/* ==========================================================================
   TinySteps — Product Landing Page
   A modern task management app with AI, Pomodoro timer, and calendar.
   ==========================================================================
   Table of Contents
   --------------------------------------------------------------------------
   1.  CSS Custom Properties (Theming)
   2.  Reset & Base
   3.  Typography
   4.  Layout Utilities
   5.  Buttons
   6.  Navigation
   7.  Hero Section
   8.  Feature Cards Grid
   9.  Platform Section
   10. Detailed Features (Alternating Rows)
   11. Stats / Highlights Bar
   12. CTA Section
   13. Footer
   14. Features Page
   15. Download Page
   16. Privacy Page
   17. Card Component
   18. Screenshot Placeholder
   19. Animations
   20. Scrollbar
   21. Media Queries
   ========================================================================== */


/* ==========================================================================
   1. CSS Custom Properties
   ========================================================================== */

:root {
  /* ---- Brand colours ---- */
  --color-primary:          #FF9500;
  --color-primary-hover:    #E88600;
  --color-primary-light:    rgba(255, 149, 0, 0.12);
  --color-primary-glow:     rgba(255, 149, 0, 0.35);

  /* ---- Neutrals ---- */
  --color-white:            #FFFFFF;
  --color-gray-50:          #FAFAFA;
  --color-gray-100:         #F5F5F7;
  --color-gray-200:         #E8E8ED;
  --color-gray-300:         #D2D2D7;
  --color-gray-400:         #AEAEB2;
  --color-gray-500:         #86868B;
  --color-gray-600:         #6E6E73;
  --color-gray-700:         #48484A;
  --color-gray-800:         #2C2C2E;
  --color-gray-900:         #1C1C1E;
  --color-black:            #000000;

  /* ---- Dark palette (hero, CTA, footer) ---- */
  --color-dark-start:       #1A1A2E;
  --color-dark-end:         #16213E;
  --color-dark-surface:     #1E1E32;
  --color-dark-border:      rgba(255, 255, 255, 0.08);
  --color-dark-text:        rgba(255, 255, 255, 0.7);
  --color-dark-text-strong: rgba(255, 255, 255, 0.95);

  /* ---- Semantic ---- */
  --color-success:          #34C759;
  --color-error:            #FF3B30;

  /* ---- Typography ---- */
  --font-family:            -apple-system, BlinkMacSystemFont, 'SF Pro Display',
                            'SF Pro Text', 'Helvetica Neue', Helvetica, Arial,
                            sans-serif;
  --font-mono:              'SF Mono', SFMono-Regular, ui-monospace,
                            Menlo, Monaco, Consolas, monospace;

  --fs-xs:                  0.75rem;   /* 12px */
  --fs-sm:                  0.875rem;  /* 14px */
  --fs-base:                1rem;      /* 16px */
  --fs-md:                  1.125rem;  /* 18px */
  --fs-lg:                  1.25rem;   /* 20px */
  --fs-xl:                  1.5rem;    /* 24px */
  --fs-2xl:                 2rem;      /* 32px */
  --fs-3xl:                 2.5rem;    /* 40px */
  --fs-4xl:                 3rem;      /* 48px */
  --fs-5xl:                 3.5rem;    /* 56px */
  --fs-hero:                4.25rem;   /* 68px */

  --lh-tight:               1.1;
  --lh-snug:                1.25;
  --lh-normal:              1.5;
  --lh-relaxed:             1.7;

  --fw-regular:             400;
  --fw-medium:              500;
  --fw-semibold:            600;
  --fw-bold:                700;

  --ls-tight:               -0.03em;
  --ls-normal:              -0.01em;
  --ls-wide:                 0.02em;

  /* ---- Spacing ---- */
  --space-xs:               0.25rem;   /* 4px  */
  --space-sm:               0.5rem;    /* 8px  */
  --space-md:               1rem;      /* 16px */
  --space-lg:               1.5rem;    /* 24px */
  --space-xl:               2rem;      /* 32px */
  --space-2xl:              3rem;      /* 48px */
  --space-3xl:              4rem;      /* 64px */
  --space-4xl:              5rem;      /* 80px */
  --space-5xl:              6rem;      /* 96px */
  --space-section:          7rem;      /* 112px */

  /* ---- Layout ---- */
  --max-width:              1200px;
  --max-width-narrow:       800px;
  --max-width-prose:        680px;
  --nav-height:             72px;
  --border-radius-sm:       8px;
  --border-radius-md:       12px;
  --border-radius-lg:       16px;
  --border-radius-xl:       24px;
  --border-radius-full:     9999px;

  /* ---- Shadows ---- */
  --shadow-xs:              0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm:              0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md:              0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg:              0 8px 30px rgba(0, 0, 0, 0.1);
  --shadow-xl:              0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow:            0 0 40px var(--color-primary-glow);
  --shadow-card:            0 1px 3px rgba(0, 0, 0, 0.04),
                            0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-card-hover:      0 4px 12px rgba(0, 0, 0, 0.06),
                            0 12px 36px rgba(0, 0, 0, 0.1);

  /* ---- Transitions ---- */
  --ease-out:               cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out-back:          cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out:            cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast:          150ms;
  --duration-normal:        250ms;
  --duration-slow:          400ms;
  --duration-slower:        600ms;

  /* ---- Z-index scale ---- */
  --z-base:                 1;
  --z-dropdown:             100;
  --z-sticky:               200;
  --z-nav:                  500;
  --z-overlay:              900;
  --z-modal:                1000;
}


/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  letter-spacing: var(--ls-normal);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  overflow-x: hidden;
}

img,
video,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

button {
  cursor: pointer;
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-white);
}


/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--color-gray-900);
}

h1 {
  font-size: var(--fs-4xl);
}

h2 {
  font-size: var(--fs-3xl);
}

h3 {
  font-size: var(--fs-2xl);
}

h4 {
  font-size: var(--fs-xl);
}

h5 {
  font-size: var(--fs-lg);
}

h6 {
  font-size: var(--fs-md);
}

p {
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
}

.text-sm       { font-size: var(--fs-sm); }
.text-base     { font-size: var(--fs-base); }
.text-md       { font-size: var(--fs-md); }
.text-lg       { font-size: var(--fs-lg); }
.text-center   { text-align: center; }
.text-muted    { color: var(--color-gray-500); }
.text-primary  { color: var(--color-primary); }

.section-label {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-500);
  max-width: 560px;
}

.section-header {
  margin-bottom: var(--space-3xl);
}

.section-header.centered {
  text-align: center;
}

.section-header.centered .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}


/* ==========================================================================
   4. Layout Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--prose {
  max-width: var(--max-width-prose);
}

section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
}

.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm      { gap: var(--space-sm); }
.gap-md      { gap: var(--space-md); }
.gap-lg      { gap: var(--space-lg); }
.gap-xl      { gap: var(--space-xl); }


/* ==========================================================================
   5. Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  line-height: 1;
  letter-spacing: var(--ls-normal);
  border-radius: var(--border-radius-full);
  transition:
    background-color var(--duration-normal) var(--ease-out),
    color            var(--duration-normal) var(--ease-out),
    box-shadow       var(--duration-normal) var(--ease-out),
    transform        var(--duration-normal) var(--ease-out),
    border-color     var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary — solid orange */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(255, 149, 0, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 4px 20px rgba(255, 149, 0, 0.45);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0) scale(0.97);
}

/* Secondary — outline */
.btn-secondary {
  background-color: transparent;
  color: var(--color-gray-900);
  border: 1.5px solid var(--color-gray-300);
}

.btn-secondary:hover {
  border-color: var(--color-gray-900);
  background-color: var(--color-gray-900);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* Secondary on dark backgrounds */
.btn-secondary--dark {
  color: var(--color-dark-text-strong);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-secondary--dark:hover {
  border-color: var(--color-white);
  background-color: var(--color-white);
  color: var(--color-gray-900);
}

/* Small variant */
.btn--sm {
  padding: 10px 22px;
  font-size: var(--fs-sm);
}

/* Large variant */
.btn--lg {
  padding: 18px 42px;
  font-size: var(--fs-md);
}

/* Button group */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}


/* ==========================================================================
   6. Navigation
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  transition:
    background-color var(--duration-slow) var(--ease-out),
    box-shadow       var(--duration-slow) var(--ease-out),
    backdrop-filter   var(--duration-slow) var(--ease-out);
}

/* Transparent state (over hero) */
.nav:not(.scrolled) {
  background-color: transparent;
}

/* Solid state (on scroll) */
.nav.scrolled {
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--color-white);
  transition: color var(--duration-normal) var(--ease-out);
}

.nav.scrolled .nav__logo {
  color: var(--color-gray-900);
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-md);
  color: var(--color-white);
  flex-shrink: 0;
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--duration-normal) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link:hover {
  color: var(--color-white);
}

.nav.scrolled .nav__link {
  color: var(--color-gray-500);
}

.nav.scrolled .nav__link:hover,
.nav.scrolled .nav__link.active {
  color: var(--color-gray-900);
}

/* Nav CTA button */
.nav__cta {
  padding: 10px 24px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
  transition:
    background-color var(--duration-normal) var(--ease-out),
    box-shadow       var(--duration-normal) var(--ease-out),
    transform        var(--duration-normal) var(--ease-out);
}

.nav__cta:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 2px 12px rgba(255, 149, 0, 0.4);
  transform: translateY(-1px);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  z-index: calc(var(--z-nav) + 10);
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition:
    transform        var(--duration-normal) var(--ease-out),
    opacity          var(--duration-normal) var(--ease-out),
    background-color var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.nav.scrolled .nav__hamburger span {
  background-color: var(--color-gray-900);
}

/* Hamburger active (open) */
.nav__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: calc(var(--z-nav) - 1);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity    var(--duration-slow) var(--ease-out),
    visibility var(--duration-slow) var(--ease-out);
}

.nav__mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.nav__mobile-menu-inner {
  position: absolute;
  top: 0;
  right: 0;
  width: min(320px, 85vw);
  height: 100%;
  background-color: var(--color-white);
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
}

.nav__mobile-menu.open .nav__mobile-menu-inner {
  transform: translateX(0);
}

.nav__mobile-link {
  display: block;
  padding: var(--space-md) 0;
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--color-gray-900);
  border-bottom: 1px solid var(--color-gray-100);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__mobile-link:hover {
  color: var(--color-primary);
}

.nav__mobile-cta {
  margin-top: var(--space-lg);
}


/* ==========================================================================
   7. Hero Section
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(
    165deg,
    var(--color-dark-start) 0%,
    var(--color-dark-end) 50%,
    #0F3460 100%
  );
  padding-top: calc(var(--nav-height) + var(--space-3xl));
  padding-bottom: var(--space-4xl);
  overflow: hidden;
}

/* Ambient background glow */
.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  width: 800px;
  height: 800px;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(255, 149, 0, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
}

/* Subtle grid pattern overlay */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: var(--z-base);
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 18px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid rgba(255, 149, 0, 0.2);
  border-radius: var(--border-radius-full);
  margin-bottom: var(--space-xl);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

.hero__title {
  font-size: var(--fs-hero);
  font-weight: var(--fw-bold);
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-lg);
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--color-primary), #FFB84D);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--color-dark-text);
  max-width: 540px;
  margin: 0 auto var(--space-2xl);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-4xl);
}

/* Hero screenshot / mockup area */
.hero__mockup {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
}

.hero__mockup-wrapper {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.2),
    0 16px 48px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* Glow behind the mockup */
.hero__mockup::before {
  content: '';
  position: absolute;
  inset: -40px;
  background: radial-gradient(
    ellipse at center,
    rgba(255, 149, 0, 0.12) 0%,
    transparent 70%
  );
  z-index: -1;
  filter: blur(20px);
}

/* Light-streak decoration */
.hero__mockup::after {
  content: '';
  position: absolute;
  top: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 149, 0, 0.5),
    transparent
  );
}


/* ==========================================================================
   8. Feature Cards Grid
   ========================================================================== */

.features {
  background-color: var(--color-white);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  position: relative;
  padding: var(--space-2xl);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  transition:
    transform  var(--duration-slow) var(--ease-out),
    box-shadow var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-gray-300);
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, var(--color-primary-light), rgba(255, 149, 0, 0.05));
  margin-bottom: var(--space-lg);
  font-size: var(--fs-xl);
  color: var(--color-primary);
  transition: background var(--duration-normal) var(--ease-out);
}

.feature-card:hover .feature-card__icon {
  background: linear-gradient(135deg, rgba(255, 149, 0, 0.2), var(--color-primary-light));
}

.feature-card__title {
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--space-sm);
}

.feature-card__desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-500);
}


/* ==========================================================================
   9. Platform Section
   ========================================================================== */

.platform {
  background-color: var(--color-gray-50);
}

.platform__content {
  text-align: center;
}

.platform__devices {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: var(--space-xl);
  max-width: 900px;
  margin: var(--space-3xl) auto 0;
}

/* Individual device mockup containers */
.platform__device {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-gray-200);
}

.platform__device--mac {
  width: 60%;
  aspect-ratio: 16 / 10;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.platform__device--ipad {
  width: 28%;
  aspect-ratio: 3 / 4;
  border-radius: var(--border-radius-md);
}

.platform__device--iphone {
  width: 15%;
  aspect-ratio: 9 / 19;
  border-radius: var(--border-radius-xl);
}

.platform__labels {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.platform__label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-gray-600);
}

.platform__label-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}


/* ==========================================================================
   10. Detailed Features (Alternating Rows)
   ========================================================================== */

.detailed-features {
  background-color: var(--color-white);
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.feature-row + .feature-row {
  margin-top: var(--space-section);
}

/* Reverse every other row */
.feature-row:nth-child(even) {
  direction: rtl;
}

.feature-row:nth-child(even) > * {
  direction: ltr;
}

.feature-row__media {
  position: relative;
}

.feature-row__screenshot {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

/* Decorative accent behind screenshots */
.feature-row__media::before {
  content: '';
  position: absolute;
  inset: -12px;
  background: linear-gradient(
    135deg,
    var(--color-primary-light),
    transparent 60%
  );
  border-radius: var(--border-radius-xl);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.feature-row:hover .feature-row__media::before {
  opacity: 1;
}

.feature-row__text {
  max-width: 480px;
}

.feature-row__label {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.feature-row__title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-lg);
}

.feature-row__desc {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-xl);
}

.feature-row__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-row__list-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: var(--fs-base);
  color: var(--color-gray-700);
  line-height: var(--lh-normal);
}

.feature-row__list-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 50%;
  font-size: var(--fs-xs);
  margin-top: 1px;
}


/* ==========================================================================
   11. Stats / Highlights Bar
   ========================================================================== */

.stats {
  background: linear-gradient(
    135deg,
    var(--color-dark-start),
    var(--color-dark-end)
  );
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.stat {
  position: relative;
  padding: var(--space-lg) var(--space-md);
}

/* Divider between stats */
.stat:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
}

.stat__value {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.stat__label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-dark-text);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}


/* ==========================================================================
   12. CTA Section
   ========================================================================== */

.cta {
  position: relative;
  background: linear-gradient(
    165deg,
    var(--color-dark-start) 0%,
    var(--color-dark-end) 50%,
    #0F3460 100%
  );
  text-align: center;
  overflow: hidden;
}

/* Radial glow */
.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(255, 149, 0, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.cta__content {
  position: relative;
  z-index: var(--z-base);
  max-width: 600px;
  margin: 0 auto;
}

.cta__title {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-lg);
}

.cta__desc {
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-dark-text);
  margin-bottom: var(--space-2xl);
}

.cta__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}


/* ==========================================================================
   13. Footer
   ========================================================================== */

.footer {
  background-color: var(--color-gray-900);
  color: var(--color-dark-text);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand {
  max-width: 280px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-md);
}

.footer__logo-icon {
  width: 28px;
  height: 28px;
  background-color: var(--color-primary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-sm);
  color: var(--color-white);
}

.footer__tagline {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-500);
}

.footer__column-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-lg);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  transition: color var(--duration-fast) var(--ease-out);
  padding: 2px 0;
}

.footer__link:hover {
  color: var(--color-primary);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-dark-border);
}

.footer__copyright {
  font-size: var(--fs-xs);
  color: var(--color-gray-600);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-gray-500);
  font-size: var(--fs-sm);
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color            var(--duration-fast) var(--ease-out);
}

.footer__social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}


/* ==========================================================================
   14. Features Page
   ========================================================================== */

.page-hero {
  background: linear-gradient(
    165deg,
    var(--color-dark-start),
    var(--color-dark-end)
  );
  padding-top: calc(var(--nav-height) + var(--space-4xl));
  padding-bottom: var(--space-4xl);
  text-align: center;
}

.page-hero__title {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-bold);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-md);
}

.page-hero__subtitle {
  font-size: var(--fs-md);
  color: var(--color-dark-text);
  max-width: 540px;
  margin: 0 auto;
}

/* Feature blocks for the dedicated features page */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  padding: var(--space-4xl) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.feature-block:last-child {
  border-bottom: none;
}

.feature-block:nth-child(even) {
  direction: rtl;
}

.feature-block:nth-child(even) > * {
  direction: ltr;
}

.feature-block__media {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.feature-block__text {
  max-width: 480px;
}

.feature-block__label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  margin-bottom: var(--space-md);
}

.feature-block__title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-lg);
}

.feature-block__desc {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-xl);
}

.feature-block__bullets {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-block__bullet {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--color-gray-700);
}

.feature-block__bullet::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}


/* ==========================================================================
   15. Download Page
   ========================================================================== */

.download {
  padding-top: calc(var(--nav-height) + var(--space-section));
  padding-bottom: var(--space-section);
  text-align: center;
}

.download__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  max-width: 700px;
  margin: var(--space-3xl) auto 0;
}

.download-card {
  position: relative;
  padding: var(--space-2xl) var(--space-xl);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  text-align: center;
  transition:
    transform    var(--duration-slow) var(--ease-out),
    box-shadow   var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out);
}

.download-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.download-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  border-radius: var(--border-radius-md);
  background: var(--color-gray-100);
  font-size: var(--fs-2xl);
  color: var(--color-gray-700);
}

.download-card__platform {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-xs);
}

.download-card__version {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-xl);
}

.download-card__requirements {
  font-size: var(--fs-xs);
  color: var(--color-gray-400);
  margin-top: var(--space-md);
}

/* Recommended badge */
.download-card--recommended::before {
  content: 'Recommended';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 14px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
  white-space: nowrap;
}


/* ==========================================================================
   16. Privacy Page
   ========================================================================== */

.privacy {
  padding-top: calc(var(--nav-height) + var(--space-4xl));
  padding-bottom: var(--space-section);
}

.privacy__content {
  max-width: var(--max-width-prose);
  margin: 0 auto;
}

.privacy__content h1 {
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-md);
}

.privacy__content h2 {
  font-size: var(--fs-xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.privacy__content h3 {
  font-size: var(--fs-lg);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.privacy__content p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-md);
}

.privacy__content ul,
.privacy__content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.privacy__content ul {
  list-style: disc;
}

.privacy__content ol {
  list-style: decimal;
}

.privacy__content li {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-sm);
}

.privacy__content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration-fast) var(--ease-out);
}

.privacy__content a:hover {
  color: var(--color-primary-hover);
}

.privacy__meta {
  font-size: var(--fs-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-gray-200);
}


/* ==========================================================================
   17. Card Component
   ========================================================================== */

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
  transition:
    transform    var(--duration-slow) var(--ease-out),
    box-shadow   var(--duration-slow) var(--ease-out),
    border-color var(--duration-slow) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-gray-300);
}

.card--flat {
  box-shadow: none;
}

.card--bordered {
  border: 1px solid var(--color-gray-200);
}

.card--dark {
  background-color: var(--color-dark-surface);
  border-color: var(--color-dark-border);
  color: var(--color-dark-text-strong);
}

.card--dark:hover {
  border-color: rgba(255, 255, 255, 0.15);
}


/* ==========================================================================
   18. Screenshot Placeholder
   ========================================================================== */

.screenshot-placeholder {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background-color: var(--color-gray-100);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  overflow: hidden;
}

.screenshot-placeholder::before {
  content: '';
  display: block;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--border-radius-sm);
  background:
    linear-gradient(
      135deg,
      transparent 40%,
      var(--color-gray-300) 40%,
      var(--color-gray-300) 60%,
      transparent 60%
    );
}

.screenshot-placeholder::after {
  content: 'Screenshot';
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-gray-400);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* Variant: tall for mobile */
.screenshot-placeholder--tall {
  aspect-ratio: 9 / 16;
}

/* Variant: square */
.screenshot-placeholder--square {
  aspect-ratio: 1 / 1;
}

/* Variant: wide for desktop */
.screenshot-placeholder--wide {
  aspect-ratio: 16 / 9;
}

/* Variant: on dark bg */
.screenshot-placeholder--dark {
  background-color: var(--color-dark-surface);
  border-color: rgba(255, 255, 255, 0.1);
}

.screenshot-placeholder--dark::before {
  border-color: rgba(255, 255, 255, 0.15);
  background:
    linear-gradient(
      135deg,
      transparent 40%,
      rgba(255, 255, 255, 0.15) 40%,
      rgba(255, 255, 255, 0.15) 60%,
      transparent 60%
    );
}

.screenshot-placeholder--dark::after {
  color: rgba(255, 255, 255, 0.25);
}


/* ==========================================================================
   19. Animations
   ========================================================================== */

/* Scroll-triggered fade-in */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity   var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children — add .stagger to parent, .fade-in to children */
.stagger .fade-in:nth-child(1)  { transition-delay: 0ms; }
.stagger .fade-in:nth-child(2)  { transition-delay: 80ms; }
.stagger .fade-in:nth-child(3)  { transition-delay: 160ms; }
.stagger .fade-in:nth-child(4)  { transition-delay: 240ms; }
.stagger .fade-in:nth-child(5)  { transition-delay: 320ms; }
.stagger .fade-in:nth-child(6)  { transition-delay: 400ms; }

/* Fade-in from left */
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition:
    opacity   var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Fade-in from right */
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition:
    opacity   var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale-in */
.scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition:
    opacity   var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Subtle float animation for decorative elements */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

.animate-float {
  animation: float 6s var(--ease-in-out) infinite;
}

/* Pulse animation */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.5; }
}

.animate-pulse {
  animation: pulse 2s var(--ease-in-out) infinite;
}

/* Shimmer loading effect */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
}

/* Reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in,
  .fade-in-left,
  .fade-in-right,
  .scale-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}


/* ==========================================================================
   20. Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-gray-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-gray-400);
}


/* ==========================================================================
   21. Media Queries
   ========================================================================== */

/* ---- Tablet and below (max-width: 1024px) ---- */
@media (max-width: 1024px) {
  :root {
    --fs-hero:  3.25rem;
    --fs-5xl:   3rem;
    --fs-4xl:   2.5rem;
    --fs-3xl:   2rem;
    --fs-2xl:   1.75rem;
    --space-section: 5rem;
  }

  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-row {
    gap: var(--space-2xl);
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .stat:nth-child(2)::after {
    display: none;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .feature-block {
    gap: var(--space-2xl);
  }
}


/* ---- Tablet portrait (max-width: 768px) ---- */
@media (max-width: 768px) {
  :root {
    --fs-hero:  2.5rem;
    --fs-4xl:   2rem;
    --fs-3xl:   1.75rem;
    --fs-2xl:   1.5rem;
    --nav-height: 64px;
    --space-section: 4rem;
  }

  .container {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }

  /* Navigation — show hamburger, hide desktop links */
  .nav__links {
    display: none;
  }

  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile-menu {
    display: block;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }

  .hero__subtitle {
    font-size: var(--fs-base);
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--space-2xl);
  }

  .hero__actions .btn {
    width: 100%;
    max-width: 320px;
  }

  /* Feature rows — stack vertically */
  .feature-row,
  .feature-block {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .feature-row:nth-child(even),
  .feature-block:nth-child(even) {
    direction: ltr;
  }

  .feature-row__text {
    max-width: 100%;
    order: 2;
  }

  .feature-row__media {
    order: 1;
  }

  .feature-block__text {
    max-width: 100%;
  }

  /* Platform — stack devices */
  .platform__devices {
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
  }

  .platform__device--mac   { width: 90%; }
  .platform__device--ipad  { width: 55%; }
  .platform__device--iphone { width: 35%; }

  .platform__labels {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  /* Stats */
  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat::after {
    display: none;
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer__brand {
    max-width: 100%;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}


/* ---- Mobile (max-width: 480px) ---- */
@media (max-width: 480px) {
  :root {
    --fs-hero:  2rem;
    --fs-4xl:   1.75rem;
    --fs-3xl:   1.5rem;
    --fs-2xl:   1.25rem;
    --space-section: 3.5rem;
  }

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    padding: var(--space-xl);
  }

  .stats__grid {
    grid-template-columns: 1fr 1fr;
  }

  .stat {
    padding: var(--space-md) var(--space-sm);
  }

  .stat__value {
    font-size: var(--fs-2xl);
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-group .btn {
    width: 100%;
  }

  .download__cards {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: var(--fs-2xl);
  }

  .hero__badge {
    font-size: var(--fs-xs);
    padding: 6px 14px;
  }
}


/* ---- Large screens (min-width: 1440px) ---- */
@media (min-width: 1440px) {
  :root {
    --max-width: 1320px;
    --fs-hero: 5rem;
  }
}


/* ---- Hover capability — ensure hover effects only on devices that support it ---- */
@media (hover: none) {
  .feature-card:hover,
  .card:hover,
  .download-card:hover {
    transform: none;
    box-shadow: var(--shadow-card);
  }

  .btn-primary:hover,
  .btn-secondary:hover {
    transform: none;
  }
}


/* ==========================================================================
   22. Compatibility Layer
   ---------------------------------------------------------------------------
   The HTML templates use simpler class names than the BEM conventions above.
   These rules bridge the gap so existing markup renders correctly.
   ========================================================================== */

/* ---- Site header wrapper ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  background-color: transparent;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  transition:
    background-color var(--duration-slow) var(--ease-out),
    box-shadow       var(--duration-slow) var(--ease-out);
}

.site-header .nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ---- Nav — simple class names ---- */
.nav-logo,
nav .logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--color-dark-text-strong);
  transition: color var(--duration-normal) var(--ease-out);
}

.nav.scrolled .nav-logo,
nav.scrolled .logo {
  color: var(--color-gray-900);
}

.nav-logo-icon {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--duration-normal) var(--ease-out);
}

.nav.scrolled .nav-links a,
nav.scrolled .nav-links a {
  color: var(--color-gray-500);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-white);
}

.nav.scrolled .nav-links a:hover,
.nav.scrolled .nav-links a.active,
nav.scrolled .nav-links a:hover,
nav.scrolled .nav-links a.active {
  color: var(--color-gray-900);
}

.nav-cta,
.btn-nav {
  padding: 10px 24px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  background-color: var(--color-primary);
  border-radius: var(--border-radius-full);
  transition:
    background-color var(--duration-normal) var(--ease-out),
    box-shadow       var(--duration-normal) var(--ease-out),
    transform        var(--duration-normal) var(--ease-out);
}

.nav-cta:hover,
.btn-nav:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 2px 12px rgba(255, 149, 0, 0.4);
  transform: translateY(-1px);
}

/* Hamburger — simple class */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  z-index: calc(var(--z-nav) + 10);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition:
    transform        var(--duration-normal) var(--ease-out),
    opacity          var(--duration-normal) var(--ease-out),
    background-color var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.nav.scrolled .hamburger span,
nav.scrolled .hamburger span {
  background-color: var(--color-gray-900);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Bare <nav> element (features.html, download.html pattern without .nav class) */
body > nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  background-color: transparent;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  transition:
    background-color var(--duration-slow) var(--ease-out),
    box-shadow       var(--duration-slow) var(--ease-out);
}

body > nav.scrolled {
  background-color: rgba(255, 255, 255, 0.88);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

/* Nav container (features.html pattern) */
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 100%;
  padding: 0 var(--space-xl);
}

/* ---- Standalone btn-primary / btn-secondary (without .btn parent) ---- */
a.btn-primary,
a.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  line-height: 1;
  border-radius: var(--border-radius-full);
  white-space: nowrap;
  transition:
    background-color var(--duration-normal) var(--ease-out),
    color            var(--duration-normal) var(--ease-out),
    box-shadow       var(--duration-normal) var(--ease-out),
    transform        var(--duration-normal) var(--ease-out),
    border-color     var(--duration-normal) var(--ease-out);
}

a.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(255, 149, 0, 0.3);
}

a.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 4px 20px rgba(255, 149, 0, 0.45);
  transform: translateY(-1px);
}

a.btn-secondary {
  background-color: transparent;
  color: var(--color-gray-900);
  border: 1.5px solid var(--color-gray-300);
}

a.btn-secondary:hover {
  border-color: var(--color-gray-900);
  background-color: var(--color-gray-900);
  color: var(--color-white);
  transform: translateY(-1px);
}

a.btn-sm {
  padding: 10px 22px;
  font-size: var(--fs-sm);
}

a.btn-lg {
  padding: 18px 42px;
  font-size: var(--fs-md);
}

/* ---- Hero — simple class names (index.html) ---- */
.hero-content {
  position: relative;
  z-index: var(--z-base);
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.hero h1 {
  font-size: var(--fs-hero);
  font-weight: var(--fw-bold);
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-lg);
}

.hero-subheadline {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--color-dark-text);
  max-width: 540px;
  margin: 0 auto var(--space-2xl);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-4xl);
}

.hero .btn-secondary {
  color: var(--color-dark-text-strong);
  border-color: rgba(255, 255, 255, 0.25);
}

.hero .btn-secondary:hover {
  border-color: var(--color-white);
  background-color: var(--color-white);
  color: var(--color-gray-900);
}

.hero-image {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
}

.hero-image .screenshot-placeholder {
  background-color: var(--color-dark-surface);
  border-color: rgba(255, 255, 255, 0.1);
}

.hero-image .screenshot-placeholder::before {
  border-color: rgba(255, 255, 255, 0.15);
  background:
    linear-gradient(
      135deg,
      transparent 40%,
      rgba(255, 255, 255, 0.15) 40%,
      rgba(255, 255, 255, 0.15) 60%,
      transparent 60%
    );
}

.hero-image .screenshot-placeholder::after {
  color: rgba(255, 255, 255, 0.25);
}

/* ---- Feature cards grid — simple class names (index.html) ---- */
.features-grid {
  background-color: var(--color-gray-50);
}

.features-grid .section-title {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.feature-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, var(--color-primary-light), rgba(255, 149, 0, 0.05));
  margin: 0 auto var(--space-lg);
  color: var(--color-primary);
}

.feature-card h3 {
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-500);
}

/* ---- Platform section — simple class names (index.html) ---- */
.platform-section {
  text-align: center;
}

.platform-section .section-title {
  text-align: center;
  margin-bottom: var(--space-md);
}

.platform-section .section-subtitle {
  margin: 0 auto var(--space-3xl);
  text-align: center;
}

.platform-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.platform-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.platform-card h3 {
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-xs);
}

.platform-card-note {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

/* ---- Feature detail rows — simple class names (index.html) ---- */
.feature-detail {
  border-bottom: 1px solid var(--color-gray-200);
}

.feature-detail:last-of-type {
  border-bottom: none;
}

.feature-detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.feature-detail--reversed .feature-detail-row {
  direction: rtl;
}

.feature-detail--reversed .feature-detail-row > * {
  direction: ltr;
}

.feature-detail-text h2 {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-lg);
}

.feature-detail-text p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-xl);
}

.feature-detail-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-detail-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--color-gray-700);
}

.feature-detail-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---- Feature grid — simple class names (features.html) ---- */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.feature-grid.img-right {
  direction: rtl;
}

.feature-grid.img-right > * {
  direction: ltr;
}

.feature-text h2 {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-lg);
}

.feature-text p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-xl);
}

.feature-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-details li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--color-gray-700);
}

.feature-details li::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

.feature-image .screenshot-placeholder {
  aspect-ratio: 4 / 3;
}

/* ---- Page hero — simple class names (features.html) ---- */
.page-hero h1 {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-bold);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-md);
}

.page-hero p {
  font-size: var(--fs-md);
  color: var(--color-dark-text);
  max-width: 540px;
  margin: 0 auto;
}

/* ---- Highlights bar — simple class names (index.html) ---- */
.highlights-bar {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-hover)
  );
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.highlight-item {
  color: var(--color-white);
}

.highlight-item strong {
  display: block;
  font-size: var(--fs-lg);
  margin-bottom: var(--space-xs);
}

.highlight-item span {
  font-size: var(--fs-sm);
  opacity: 0.85;
}

/* ---- CTA section — simple class names ---- */
.cta-section {
  position: relative;
  background: linear-gradient(
    165deg,
    var(--color-dark-start) 0%,
    var(--color-dark-end) 50%,
    #0F3460 100%
  );
  text-align: center;
  overflow: hidden;
}

.cta-section h2 {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-lg);
}

.cta-section p {
  font-size: var(--fs-md);
  color: var(--color-dark-text);
  margin-bottom: var(--space-2xl);
}

/* ---- Footer — simple class names ---- */
.site-footer,
body > footer {
  background-color: var(--color-gray-900);
  color: var(--color-dark-text);
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-xl);
}

.footer-columns,
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand .footer-logo,
.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-500);
}

.footer-column h4,
.footer-links h4 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-lg);
}

.footer-column ul,
.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-column li,
.footer-links li {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
}

.footer-column a,
.footer-links a {
  color: var(--color-gray-500);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-column a:hover,
.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-dark-border);
}

.footer-bottom p {
  font-size: var(--fs-xs);
  color: var(--color-gray-600);
}

/* ---- Download page — simple class names ---- */
.download-hero {
  background: linear-gradient(
    165deg,
    var(--color-dark-start) 0%,
    var(--color-dark-end) 50%,
    #0F3460 100%
  );
  padding-top: calc(var(--nav-height) + var(--space-4xl));
  padding-bottom: var(--space-4xl);
  text-align: center;
}

.download-hero h1 {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-bold);
  color: var(--color-dark-text-strong);
  margin-bottom: var(--space-md);
}

.download-hero p {
  font-size: var(--fs-md);
  color: var(--color-dark-text);
  max-width: 540px;
  margin: 0 auto;
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  max-width: 700px;
  margin: 0 auto;
}

.download-card-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
}

.download-card h2 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-xs);
}

.download-card .version-info {
  font-size: var(--fs-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-xl);
}

.requirements-section {
  background-color: var(--color-gray-50);
}

.requirements-section h2 {
  font-size: var(--fs-2xl);
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  max-width: 700px;
  margin: 0 auto;
}

.requirement-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
}

.requirement-card h3 {
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-md);
}

.requirement-card li {
  padding: var(--space-sm) 0;
  font-size: var(--fs-sm);
  color: var(--color-gray-600);
  border-bottom: 1px solid var(--color-gray-100);
}

.requirement-card li:last-child {
  border-bottom: none;
}

/* ---- Legal / Privacy — simple class names ---- */
.legal-content {
  padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-xl) var(--space-section);
  max-width: var(--max-width-prose);
  margin: 0 auto;
}

.legal-content h1 {
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-sm);
}

.legal-content .last-updated {
  font-size: var(--fs-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-gray-200);
}

.legal-content h2 {
  font-size: var(--fs-xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.legal-content p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-md);
}

.legal-content ul {
  list-style: disc;
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

.legal-content li {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-gray-600);
  margin-bottom: var(--space-sm);
}

/* ---- Responsive overrides for simple class names ---- */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-columns {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: var(--space-xl);
    gap: var(--space-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-nav);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    color: var(--color-gray-900) !important;
    font-size: var(--fs-md);
  }

  .nav-cta {
    display: none;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons a {
    width: 100%;
    max-width: 320px;
  }

  .feature-detail-row,
  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .feature-detail--reversed .feature-detail-row,
  .feature-grid.img-right {
    direction: ltr;
  }

  .platform-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .download-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .requirements-grid {
    grid-template-columns: 1fr;
  }

  .footer-columns,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }

  .highlights-grid {
    grid-template-columns: 1fr 1fr;
  }
}