/* Mailbox Client – modern documentation styles */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --color-bg: #ffffff;
  --color-bg-soft: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-surface: #f5f5f7;
  --color-text: #1d1d1f;
  --color-text-secondary: #424245;
  --color-text-muted: #6e6e73;
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-accent-soft: rgba(0, 113, 227, 0.08);
  --color-border: rgba(0, 0, 0, 0.1);
  --color-border-strong: rgba(0, 0, 0, 0.18);
  --color-link: #0066cc;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-purple: #af52de;
  --color-pink: #ff2d55;
  --color-teal: #5ac8fa;

  --gradient-hero: linear-gradient(135deg, #5ac8fa 0%, #0071e3 50%, #af52de 100%);
  --gradient-card-ai: linear-gradient(135deg, rgba(175, 82, 222, 0.12) 0%, rgba(0, 113, 227, 0.12) 100%);
  --gradient-card-privacy: linear-gradient(135deg, rgba(52, 199, 89, 0.12) 0%, rgba(0, 199, 190, 0.12) 100%);
  --gradient-card-cloud: linear-gradient(135deg, rgba(0, 113, 227, 0.12) 0%, rgba(90, 200, 250, 0.12) 100%);
  --gradient-card-search: linear-gradient(135deg, rgba(255, 149, 0, 0.12) 0%, rgba(255, 45, 85, 0.12) 100%);

  --max-width: 1100px;
  --max-width-narrow: 760px;
  --spacing-unit: 8px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 6px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.12), 0 6px 18px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 80px rgba(0, 113, 227, 0.25);

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #000000;
    --color-bg-soft: #0a0a0a;
    --color-bg-elevated: #161617;
    --color-surface: #1d1d1f;
    --color-text: #f5f5f7;
    --color-text-secondary: #d2d2d7;
    --color-text-muted: #86868b;
    --color-accent: #2997ff;
    --color-accent-hover: #5eb3ff;
    --color-accent-soft: rgba(41, 151, 255, 0.12);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-strong: rgba(255, 255, 255, 0.2);
    --color-link: #5eb3ff;

    --gradient-card-ai: linear-gradient(135deg, rgba(175, 82, 222, 0.18) 0%, rgba(41, 151, 255, 0.18) 100%);
    --gradient-card-privacy: linear-gradient(135deg, rgba(52, 199, 89, 0.18) 0%, rgba(0, 199, 190, 0.18) 100%);
    --gradient-card-cloud: linear-gradient(135deg, rgba(41, 151, 255, 0.18) 0%, rgba(90, 200, 250, 0.18) 100%);
    --gradient-card-search: linear-gradient(135deg, rgba(255, 149, 0, 0.18) 0%, rgba(255, 45, 85, 0.18) 100%);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 100px rgba(41, 151, 255, 0.35);
  }
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* RTL support */
html[dir="rtl"] body {
  direction: rtl;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover {
  text-decoration: underline;
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.45em;
  background: var(--color-surface);
  border-radius: 5px;
  border: 1px solid var(--color-border);
}

kbd {
  font-family: var(--font-mono);
  font-size: 0.8em;
  padding: 0.2em 0.55em;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 3);
}

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

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: calc(var(--spacing-unit) * 2) 0;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(0, 0, 0, 0.72);
  }
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-unit);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 1.25);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

.site-logo img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  box-shadow: var(--shadow-sm);
}

.nav-links {
  display: flex;
  gap: calc(var(--spacing-unit) * 3);
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-weight: 450;
  position: relative;
}

.nav-links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.nav-links a.is-active {
  color: var(--color-text);
  font-weight: 600;
}

/* Language switcher */
.lang-switcher {
  position: relative;
  display: inline-block;
}

.lang-switcher summary,
.lang-switcher-toggle {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.75);
  padding: 6px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-pill);
  background: var(--color-bg-elevated);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  color: var(--color-text);
  transition: background var(--transition), border-color var(--transition);
}

.lang-switcher summary::-webkit-details-marker {
  display: none;
}

.lang-switcher summary:hover {
  background: var(--color-surface);
  border-color: var(--color-text-muted);
}

.lang-switcher-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 200;
  list-style: none;
  margin: 0;
  max-height: 320px;
  overflow-y: auto;
}

html[dir="rtl"] .lang-switcher-menu {
  right: auto;
  left: 0;
}

.lang-switcher-menu li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 450;
  text-decoration: none;
  transition: background var(--transition);
}

.lang-switcher-menu li a:hover {
  background: var(--color-surface);
  text-decoration: none;
}

.lang-switcher-menu li a.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
}

.lang-switcher-menu .lang-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.lang-switcher-menu li a.is-active .lang-code {
  color: var(--color-accent);
}

/* Hero */
.hero {
  position: relative;
  text-align: center;
  padding: calc(var(--spacing-unit) * 12) 0 calc(var(--spacing-unit) * 10);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: var(--gradient-hero);
  opacity: 0.12;
  filter: blur(80px);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  .hero::before {
    opacity: 0.22;
  }
}

.hero-icon {
  width: 128px;
  height: 128px;
  margin: 0 auto calc(var(--spacing-unit) * 3);
  border-radius: 28px;
  box-shadow: var(--shadow-lg);
  animation: floatIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .subtitle {
  margin: 0 auto calc(var(--spacing-unit) * 4);
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 580px;
  line-height: 1.5;
  font-weight: 400;
}

.hero-cta {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: calc(var(--spacing-unit) * 2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 1);
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  text-align: center;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.3);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.4);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-ghost:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

/* Mac App Store badge */
.badge-app-store {
  display: inline-block;
  height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.badge-app-store .badge-svg {
  height: 100%;
  width: auto;
  display: block;
}

.badge-app-store .badge-bg {
  fill: #000;
}

@media (prefers-color-scheme: dark) {
  .badge-app-store .badge-bg {
    fill: #1d1d1f;
    stroke: rgba(255, 255, 255, 0.15);
    stroke-width: 1;
  }
}

.badge-app-store .badge-text {
  fill: #fff;
}

/* Sections */
.section {
  padding: calc(var(--spacing-unit) * 10) 0;
}

.section-alt {
  background: var(--color-bg-soft);
}

@media (prefers-color-scheme: dark) {
  .section-alt {
    background: var(--color-bg-soft);
  }
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto calc(var(--spacing-unit) * 6);
}

.section-eyebrow {
  display: inline-block;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  padding: 4px 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-pill);
}

.section-title {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section-lead {
  margin: 0;
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* Feature grid (home) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--spacing-unit) * 3);
}

.feature-card {
  padding: calc(var(--spacing-unit) * 4);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}

.feature-card .feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: calc(var(--spacing-unit) * 2);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.feature-card .feature-icon svg {
  width: 26px;
  height: 26px;
}

.feature-card.tint-ai .feature-icon {
  background: var(--gradient-card-ai);
  color: var(--color-purple);
}

.feature-card.tint-privacy .feature-icon {
  background: var(--gradient-card-privacy);
  color: var(--color-success);
}

.feature-card.tint-cloud .feature-icon {
  background: var(--gradient-card-cloud);
  color: var(--color-teal);
}

.feature-card.tint-search .feature-icon {
  background: var(--gradient-card-search);
  color: var(--color-warning);
}

.feature-card h3 {
  margin: 0 0 var(--spacing-unit);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.feature-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* Highlights / split section */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--spacing-unit) * 5);
  align-items: center;
}

@media (min-width: 768px) {
  .split.split-reverse {
    grid-template-columns: 1.1fr 1fr;
  }
  .split {
    grid-template-columns: 1fr 1.1fr;
  }
  .split.split-reverse > :first-child {
    order: 2;
  }
}

.split h2 {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.split p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.split-visual {
  position: relative;
  padding: calc(var(--spacing-unit) * 4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.split-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  opacity: 0.06;
  pointer-events: none;
}

.split-visual .stat-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: calc(var(--spacing-unit) * 3);
  width: 100%;
}

.stat-tile {
  text-align: center;
  padding: calc(var(--spacing-unit) * 2);
  background: var(--color-bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.stat-tile .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  margin: 0;
  line-height: 1.1;
}

.stat-tile .stat-label {
  margin: 4px 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Bullet list with checks */
.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-success);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'><path d='M6.173 11.78a.75.75 0 01-1.06 0L2.22 8.886a.75.75 0 011.06-1.06l2.364 2.364 5.075-5.076a.75.75 0 011.06 1.061l-5.606 5.605z'/></svg>");
  background-size: 14px;
  background-position: center;
  background-repeat: no-repeat;
}

html[dir="rtl"] .check-list li {
  padding-left: 0;
  padding-right: 28px;
}

html[dir="rtl"] .check-list li::before {
  left: auto;
  right: 0;
}

/* Footer */
.site-footer {
  padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 5);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-soft);
  margin-top: calc(var(--spacing-unit) * 4);
}

.site-footer .container {
  display: grid;
  gap: calc(var(--spacing-unit) * 4);
}

@media (min-width: 720px) {
  .site-footer .container {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    align-items: start;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1.5);
}

.footer-brand .site-logo {
  font-size: 1rem;
}

.footer-brand p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  max-width: 30ch;
}

.footer-column h4 {
  margin: 0 0 calc(var(--spacing-unit) * 1.5);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.footer-column ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-unit);
}

.footer-column a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.footer-column a:hover {
  color: var(--color-text);
}

.footer-bottom {
  padding-top: calc(var(--spacing-unit) * 4);
  border-top: 1px solid var(--color-border);
  margin-top: calc(var(--spacing-unit) * 4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 2);
}

.copyright {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Page header (interior pages) */
.page-header {
  padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 4);
  text-align: center;
}

.page-title {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.page-intro {
  margin: 0 auto;
  max-width: 620px;
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: calc(var(--spacing-unit) * 3);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.back-link:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* Anchor nav (features page) */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: calc(var(--spacing-unit) * 1.5);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin: 0 0 calc(var(--spacing-unit) * 5);
  box-shadow: var(--shadow-sm);
}

.anchor-nav a {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.anchor-nav a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  text-decoration: none;
}

/* Deep dive feature sections */
.feature-section {
  padding: calc(var(--spacing-unit) * 6) 0;
  border-top: 1px solid var(--color-border);
}

.feature-section:first-of-type {
  border-top: none;
}

.feature-section .feature-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: calc(var(--spacing-unit) * 2);
  padding: 6px 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
}

.feature-section h2 {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.feature-section .lead {
  margin: 0 0 calc(var(--spacing-unit) * 3);
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 65ch;
  line-height: 1.55;
}

.feature-section ul:not(.check-list) {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  padding-left: 1.5rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.9375rem;
}

html[dir="rtl"] .feature-section ul:not(.check-list) {
  padding-left: 0;
  padding-right: 1.5rem;
}

.feature-section ul li {
  margin-bottom: calc(var(--spacing-unit) * 0.75);
}

.callout {
  margin: calc(var(--spacing-unit) * 3) 0 0;
  padding: calc(var(--spacing-unit) * 2.5);
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

html[dir="rtl"] .callout {
  border-left: none;
  border-right: 4px solid var(--color-accent);
  border-radius: var(--radius) 0 0 var(--radius);
}

.callout strong {
  color: var(--color-text);
}

.callout.callout-warning {
  border-left-color: var(--color-warning);
  background: rgba(255, 149, 0, 0.06);
}

html[dir="rtl"] .callout.callout-warning {
  border-right-color: var(--color-warning);
}

.callout.callout-success {
  border-left-color: var(--color-success);
  background: rgba(52, 199, 89, 0.06);
}

html[dir="rtl"] .callout.callout-success {
  border-right-color: var(--color-success);
}

/* Requirements grid */
.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: calc(var(--spacing-unit) * 2);
  margin: calc(var(--spacing-unit) * 3) 0;
}

.requirement-card {
  padding: calc(var(--spacing-unit) * 2.5);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.requirement-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.requirement-card h4 {
  margin: 0 0 var(--spacing-unit);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.requirement-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text);
  font-weight: 500;
}

/* Install / steps */
.steps {
  display: grid;
  gap: calc(var(--spacing-unit) * 3);
  margin: calc(var(--spacing-unit) * 4) 0;
  counter-reset: step;
}

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: calc(var(--spacing-unit) * 3);
  align-items: start;
  padding: calc(var(--spacing-unit) * 3);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.125rem;
}

.step h3 {
  margin: 0 0 var(--spacing-unit);
  font-size: 1.0625rem;
  font-weight: 600;
}

.step p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* FAQ */
.faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1.5);
}

.faq-item {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover {
  border-color: var(--color-border-strong);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: calc(var(--spacing-unit) * 2.5);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  position: relative;
  padding-right: calc(var(--spacing-unit) * 6);
  transition: background var(--transition);
}

html[dir="rtl"] .faq-item summary {
  padding-right: calc(var(--spacing-unit) * 2.5);
  padding-left: calc(var(--spacing-unit) * 6);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: calc(var(--spacing-unit) * 2.5);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform var(--transition);
}

html[dir="rtl"] .faq-item summary::after {
  right: auto;
  left: calc(var(--spacing-unit) * 2.5);
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  color: var(--color-accent);
}

.faq-item summary:hover {
  background: var(--color-surface);
}

.faq-item .faq-body {
  padding: 0 calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 2.5);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.faq-item .faq-body p {
  margin: 0 0 var(--spacing-unit);
}

.faq-item .faq-body p:last-child {
  margin-bottom: 0;
}

/* Forms */
.contact-form {
  max-width: 520px;
  margin-top: calc(var(--spacing-unit) * 4);
}

.form-group {
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-unit);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-soft);
}

/* Legal content */
.legal-content {
  max-width: 70ch;
  margin: 0 auto;
}

.legal-content h2 {
  margin: calc(var(--spacing-unit) * 5) 0 calc(var(--spacing-unit) * 1.5);
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.legal-content h2:first-of-type {
  margin-top: 0;
}

.legal-content p,
.legal-content ul {
  margin: 0 0 calc(var(--spacing-unit) * 2);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.legal-content ul {
  padding-left: 1.5rem;
}

html[dir="rtl"] .legal-content ul {
  padding-left: 0;
  padding-right: 1.5rem;
}

.legal-content li {
  margin-bottom: calc(var(--spacing-unit) * 0.75);
}

/* Table for data locations */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--spacing-unit) * 2) 0;
  font-size: 0.9375rem;
  background: var(--color-bg-elevated);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.data-table th,
.data-table td {
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

html[dir="rtl"] .data-table th,
html[dir="rtl"] .data-table td {
  text-align: right;
}

.data-table th {
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table td {
  color: var(--color-text-secondary);
}

/* Reduced motion */
@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;
  }
}

/* Mobile tweaks */
@media (max-width: 640px) {
  .nav-links {
    gap: calc(var(--spacing-unit) * 2);
  }
  .nav-links li:not(:last-child) {
    display: none;
  }
  .hero {
    padding: calc(var(--spacing-unit) * 8) 0 calc(var(--spacing-unit) * 6);
  }
  .hero-icon {
    width: 96px;
    height: 96px;
  }
  .step {
    grid-template-columns: 40px 1fr;
    gap: calc(var(--spacing-unit) * 2);
    padding: calc(var(--spacing-unit) * 2);
  }
  .step-number {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
}