/* ==========================================================================
   Next — Apple-Inspired Warm Editorial Design System
   Palette: Warm Linen Paper, Deep Ink, Natural Forest/Sage Accent
   Typography: Editorial Serif + SF Pro Sans + Monospace
   Layout: Flat, Upfront Screenshots, Zero 3D Skews, Generous Breathing Room
   ========================================================================== */

:root {
  /* Warm Linen & Paper Palette */
  --canvas: #f4efea;
  --surface: #faf8f5;
  --surface-muted: #f2ebe3;
  --surface-raised: #ffffff;
  --surface-selected: #e3ede0;

  /* Hairline Lines & Borders */
  --line: #ded6cc;
  --line-strong: #c8bfb3;
  --line-hover: #b0a597;

  /* Typography Colors */
  --ink: #262321;
  --ink-secondary: #59534d;
  --ink-muted: #7f766e;

  /* Signature Natural Accent: Forest / Sage Green */
  --accent: #3b5f3a;
  --accent-hover: #2b472a;
  --accent-soft: #dbe7d8;
  --accent-subtle: rgba(59, 95, 58, 0.08);

  /* Typography */
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Apple-Grade Elevation (Soft, Natural, No Slop) */
  --shadow-sm: 0 1px 3px rgba(40, 35, 30, 0.06), 0 1px 2px rgba(40, 35, 30, 0.04);
  --shadow-md: 0 8px 24px -4px rgba(40, 35, 30, 0.1), 0 2px 6px -1px rgba(40, 35, 30, 0.06);
  --shadow-lg: 0 20px 48px -10px rgba(40, 35, 30, 0.16), 0 4px 12px -2px rgba(40, 35, 30, 0.06);
  --shadow-device: 0 24px 60px -12px rgba(35, 30, 25, 0.22), 0 6px 18px -3px rgba(35, 30, 25, 0.08);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-apple: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 160ms;
  --duration-normal: 260ms;
}

/* --------------------------------------------------------------------------
   Base & Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1.5rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: top var(--duration-fast) var(--ease-apple);
}

.skip-link:focus {
  top: 1.5rem;
}

.site-shell {
  width: min(1140px, calc(100% - 3rem));
  margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Header & Sticky Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(244, 239, 234, 0.9);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.wordmark-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--ink-secondary);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.nav-link-gh {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  transition: all var(--duration-fast) ease;
}

.nav-link-gh:hover {
  border-color: var(--accent);
  background: var(--surface-raised);
}

.nav-link-gh svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.nav-contact {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink) !important;
}

.nav-contact:hover {
  border-color: var(--accent);
  background: var(--surface);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.95rem;
  background: #1c1b1a;
  color: #ffffff !important;
  border: 1px solid #1c1b1a;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  transition: all var(--duration-fast) ease;
  box-shadow: 0 2px 6px rgba(28, 27, 26, 0.12);
  text-decoration: none;
}

.nav-cta:hover {
  background: #000000;
  border-color: #000000;
  color: #ffffff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.18);
}

.nav-apple-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  fill: currentColor;
}

/* --------------------------------------------------------------------------
   Typography Standards (Apple Editorial Calm)
   -------------------------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(2.6rem, 5.2vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 3.4vw, 2.75rem);
}

h3 {
  font-size: 1.35rem;
}

.lede {
  color: var(--ink-secondary);
  font-size: clamp(1.0625rem, 1.5vw, 1.22rem);
  line-height: 1.6;
  max-width: 38rem;
}

.prose {
  color: var(--ink-secondary);
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 65ch;
}

.code-tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
}

/* --------------------------------------------------------------------------
   Buttons & Action Controls
   -------------------------------------------------------------------------- */
.actions-row, .actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.btn, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.85rem;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.btn-primary, .button:not(.button-secondary):not(.button-disabled) {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.btn-primary:hover, .button:not(.button-secondary):not(.button-disabled):hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-secondary, .button-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.btn-secondary:hover, .button-secondary:hover {
  background: var(--surface-raised);
  border-color: var(--accent);
}

.btn-disabled, .button-disabled {
  background: var(--surface-muted);
  color: var(--ink-muted);
  border: 1px solid var(--line);
  cursor: default;
}

.button-app-store {
  background: #1c1b1a !important;
  border-color: #1c1b1a !important;
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(28, 27, 26, 0.16);
  text-decoration: none;
}

.button-app-store:hover {
  background: #000000 !important;
  border-color: #000000 !important;
  color: #ffffff !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.22);
}

.btn-apple-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: currentColor;
}

/* --------------------------------------------------------------------------
   Section Structure
   -------------------------------------------------------------------------- */
.section {
  padding: clamp(4.5rem, 8vw, 7rem) 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 3rem;
  max-width: 44rem;
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
  align-items: center;
}

/* --------------------------------------------------------------------------
   Hero (Upfront, Flat, Square, No 3D Tilts)
   -------------------------------------------------------------------------- */
.hero {
  padding: clamp(3.5rem, 6vw, 5.5rem) 0 clamp(4rem, 7vw, 6rem);
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
  border-bottom: 1px solid var(--line);
}

.hero-top {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.9fr);
  align-items: end;
  gap: 3rem;
}

.hero-copy h1 {
  margin-bottom: 1.15rem;
}

.hero-copy .lede {
  margin-bottom: 1.75rem;
}

.hero-stats-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
}

.hero-stat-item strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.hero-stat-item span {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
}

/* Hero Flat Stage: Apple-style layered composition */
.hero-flat-stage {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #eae3d9 0%, #f0eae1 100%);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.hero-stage-inner {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

/* Mac Widescreen Frame (Completely Flat & Square) */
.hero-mac-frame {
  width: min(100%, 940px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(40, 35, 30, 0.12);
  background: #25282a;
  box-shadow: var(--shadow-device);
  overflow: hidden;
  cursor: zoom-in;
  transition: transform var(--duration-normal) var(--ease-apple), box-shadow var(--duration-normal) var(--ease-apple);
}

.hero-mac-frame:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 70px -15px rgba(35, 30, 25, 0.28);
}

.hero-mac-frame img {
  width: 100%;
  height: auto;
  display: block;
}

/* iPhone Companion Badge (Completely Flat & Upright) */
.hero-phone-stand {
  position: absolute;
  right: clamp(0.5rem, 4vw, 3rem);
  bottom: -1rem;
  width: clamp(140px, 18vw, 195px);
  cursor: zoom-in;
  filter: drop-shadow(0 20px 35px rgba(35, 30, 25, 0.3));
  transition: transform var(--duration-normal) var(--ease-apple);
}

.hero-phone-stand:hover {
  transform: translateY(-4px);
}

.hero-phone-stand img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-zoom-tag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-secondary);
  box-shadow: var(--shadow-sm);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Core Principles (Clear, Editorial Cards)
   -------------------------------------------------------------------------- */
.principles-row, .principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.principle-box, .principle {
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.principle-box strong, .principle strong {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink);
}

.principle-box p, .principle span {
  font-size: 0.875rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Platform Showcase (Interactive Apple-Style Stage)
   -------------------------------------------------------------------------- */
.platform-switch-container {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

.segmented-pill {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-full);
  padding: 4px;
  gap: 4px;
  box-shadow: var(--shadow-sm);
}

.segmented-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.4rem;
  border-radius: var(--radius-full);
  border: 0;
  background: transparent;
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.segmented-btn:hover {
  color: var(--ink);
}

.segmented-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(59, 95, 58, 0.25);
}

.segmented-btn svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.platform-stage-card {
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}

.platform-pane {
  display: none;
}

.platform-pane.active {
  display: block;
  animation: fadeIn 220ms ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mac Display: Clean flat widescreen window */
.mac-display-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.85fr) minmax(0, 1fr);
  gap: 2.25rem;
  align-items: start;
}

.mac-main-shot {
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
  overflow: hidden;
  box-shadow: var(--shadow-device);
  background: #23272a;
  cursor: zoom-in;
  transition: transform var(--duration-normal) var(--ease-apple);
}

.mac-main-shot:hover {
  transform: translateY(-2px);
}

.mac-main-shot img {
  width: 100%;
  display: block;
}

.mac-screen-pills {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.screen-pill-btn {
  flex: 1;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  border: 1px solid var(--line);
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}

.screen-pill-btn:hover {
  background: var(--surface-raised);
  border-color: var(--line-strong);
  color: var(--ink);
}

.screen-pill-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.mac-feature-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mac-feature-card {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: var(--surface-raised);
  border: 1px solid var(--line);
}

.mac-feature-card h4 {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--ink);
}

.mac-feature-card p {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  line-height: 1.55;
}

/* iPhone Display: 3-column flat cards */
.iphone-stage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.iphone-item-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.iphone-img-wrap {
  width: min(100%, 230px);
  cursor: zoom-in;
  filter: drop-shadow(0 14px 28px rgba(35, 30, 25, 0.22));
  transition: transform var(--duration-normal) var(--ease-apple);
}

.iphone-img-wrap:hover {
  transform: translateY(-4px);
}

.iphone-img-wrap img {
  width: 100%;
  display: block;
}

.iphone-item-card h4 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.iphone-item-card p {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Architecture & Vault Deep-Dive (Engineering Truth)
   -------------------------------------------------------------------------- */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: stretch;
}

.vault-window {
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
  background: #202326;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.vault-window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: #2b2f33;
  border-bottom: 1px solid #383e44;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #a4adb5;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #4a5158;
}

.vault-code {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #eceff2;
  overflow-x: auto;
}

.vault-code .c-comment { color: #828d97; }
.vault-code .c-tag { color: #52c41a; }
.vault-code .c-prop { color: #69c0ff; }
.vault-code .c-val { color: #ffd666; }
.vault-code .c-done { color: #95de64; }

.arch-guarantees {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
}

.guarantee-box {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.guarantee-box h4 {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--accent);
}

.guarantee-box p {
  font-size: 0.84rem;
  color: var(--ink-secondary);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   Feature Breakdown (Side-by-Side Apple Product Feature Cards)
   -------------------------------------------------------------------------- */
.feature-list, .features-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(4rem, 8vw, 6.5rem);
}

.feature, .feature-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.feature.reverse, .feature-panel.reverse {
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
}

.feature.reverse .feature-copy, .feature-panel.reverse .feature-desc {
  order: 2;
}

.feature.reverse .feature-shot, .feature-panel.reverse .feature-image {
  order: 1;
}

.feature-copy, .feature-desc {
  max-width: 36rem;
}

.feature-copy h3, .feature-desc h3 {
  font-size: clamp(1.65rem, 2.6vw, 2.2rem);
  line-height: 1.15;
  margin-bottom: 0.85rem;
  color: var(--ink);
}

.feature-copy p, .feature-desc p {
  color: var(--ink-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.feature-points, .feature-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 0;
  margin: 1.25rem 0 0;
}

.feature-points li, .feature-bullets li {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  font-size: 0.9375rem;
  color: var(--ink);
  line-height: 1.5;
}

.feature-points li::before, .feature-bullets li::before {
  content: "•";
  color: var(--accent);
  font-weight: 900;
  font-size: 1.1rem;
}

/* Feature Shot: Nicely Capped Apple iPhone Frame (max 300px) */
.feature-shot {
  justify-self: center;
  width: min(100%, 300px);
}

.feature-shot .screenshot,
.feature-image-box {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  border-radius: 28px;
  overflow: visible;
  background: transparent;
  cursor: zoom-in;
  transition: transform var(--duration-normal) var(--ease-apple);
}

.feature-shot .screenshot img,
.feature-image-box img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 28px;
  filter: drop-shadow(0 20px 40px rgba(44, 42, 41, 0.22));
}

.feature-shot .screenshot:hover,
.feature-image-box:hover {
  transform: translateY(-3px);
}

/* AI Dual Screenshot Showcase */
.ai-section {
  margin-top: clamp(4rem, 8vw, 6rem);
  padding: clamp(2.5rem, 5vw, 4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface-muted);
}

.ai-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.ai-shots, .ai-duo-shots {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  align-items: end;
  justify-items: center;
}

.ai-shots .screenshot,
.ai-duo-shots .feature-image-box {
  width: 100%;
  max-width: 230px;
  border-radius: 24px;
  cursor: zoom-in;
}

.ai-shots .screenshot img,
.ai-duo-shots img {
  display: block;
  width: 100%;
  max-width: 230px;
  height: auto;
  border-radius: 24px;
  filter: drop-shadow(0 18px 36px rgba(44, 42, 41, 0.2));
}

/* --------------------------------------------------------------------------
   Privacy Callout Banner
   -------------------------------------------------------------------------- */
.privacy-strip, .privacy-callout {
  padding: 2.25rem;
  border-radius: var(--radius-lg);
  background: var(--surface-selected);
  border: 1px solid #bfd5bb;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.75rem;
  align-items: center;
}

.privacy-badge-icon, .privacy-mark {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.privacy-strip h3, .privacy-callout h3 {
  font-size: 1.25rem;
  margin-bottom: 0.35rem;
}

.privacy-strip p, .privacy-callout p {
  font-size: 0.875rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Closing Section & Footer
   -------------------------------------------------------------------------- */
.closing-block, .closing {
  text-align: center;
  padding: clamp(4rem, 7vw, 6rem) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.closing-logo-img, .closing-logo {
  width: 60px;
  height: 60px;
  border-radius: 15px;
  box-shadow: var(--shadow-md);
  margin-bottom: 0.5rem;
}

.closing-block h2, .closing h2 {
  font-size: clamp(2.2rem, 4vw, 3rem);
}

.closing-block p, .closing p {
  color: var(--ink-secondary);
  font-size: 1.05rem;
  max-width: 36rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.25rem 0 3.25rem;
  background: var(--canvas);
}

.footer-content, .footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.footer-brand-lockup, .footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-nav, .footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-nav a:hover, .footer-links a:hover {
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   Subpage Layouts (Privacy, Support, 404)
   -------------------------------------------------------------------------- */
.page-hero {
  max-width: 47rem;
  padding: clamp(3.5rem, 6vw, 5rem) 0 2.5rem;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  margin-bottom: 0.85rem;
}

.page-hero .lede {
  margin-bottom: 1rem;
}

.updated {
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.content {
  max-width: 50rem;
  padding: 3rem 0 5rem;
}

.content h2 {
  margin: 2.5rem 0 0.75rem;
  font-size: 1.65rem;
}

.content h3 {
  margin: 1.5rem 0 0.45rem;
  font-size: 1.15rem;
  font-family: var(--font-sans);
}

.content p, .content li {
  color: var(--ink-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.content ul {
  padding-left: 1.25rem;
  margin: 0.75rem 0 1.25rem;
}

.content li + li {
  margin-top: 0.35rem;
}

.content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.callout {
  margin: 1.5rem 0 2rem;
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius-sm);
  background: var(--surface-selected);
  border-left: 4px solid var(--accent);
  color: var(--ink);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin: 2rem 0;
}

.support-card {
  padding: 1.35rem;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--line);
}

.support-card h3 {
  font-size: 1rem;
  font-family: var(--font-sans);
  margin-bottom: 0.45rem;
}

.support-card p {
  font-size: 0.84rem;
  color: var(--ink-secondary);
}

.not-found {
  min-height: 65vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.25rem;
  padding: 4rem 1.5rem;
}

/* --------------------------------------------------------------------------
   Lightbox Modal
   -------------------------------------------------------------------------- */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(30, 25, 20, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity var(--duration-normal) ease;
}

.lightbox-overlay.active {
  display: flex;
  opacity: 1;
}

.lightbox-modal-body {
  position: relative;
  max-width: min(1200px, 92vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}

.lightbox-view-img {
  max-width: 100%;
  max-height: calc(85vh - 50px);
  border-radius: var(--radius-md);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  object-fit: contain;
}

.lightbox-caption-text {
  font-size: 0.84rem;
  color: #fff;
  background: rgba(0, 0, 0, 0.6);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
}

.lightbox-dismiss {
  position: absolute;
  top: -2.5rem;
  right: 0;
  background: #fff;
  border: 0;
  color: #000;
  font-size: 1.25rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* --------------------------------------------------------------------------
   Responsive Overrides
   -------------------------------------------------------------------------- */
@media (max-width: 980px) {
  .hero-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .mac-display-grid {
    grid-template-columns: 1fr;
  }
  .arch-grid {
    grid-template-columns: 1fr;
  }
  .feature,
  .feature.reverse,
  .feature-panel,
  .feature-panel.reverse {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .feature.reverse .feature-copy,
  .feature-panel.reverse .feature-desc { order: 1; }
  .feature.reverse .feature-shot,
  .feature-panel.reverse .feature-image { order: 2; }
  .feature-shot {
    width: min(100%, 280px);
  }
  .ai-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .ai-shots {
    max-width: 460px;
    margin: 0 auto;
  }
  .principles-row, .principles {
    grid-template-columns: 1fr;
  }
  .iphone-stage-grid {
    grid-template-columns: 1fr;
  }
  .privacy-strip, .privacy-callout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: calc(100% - 2rem);
  }
  .nav-links {
    display: none;
  }
  .hero-phone-stand {
    display: none;
  }
  .support-grid {
    grid-template-columns: 1fr;
  }
  .footer-content, .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}