/* ─── DESIGN TOKENS ─── */
:root {
  --bg: #F7F5F0;
  --bg-alt: #EFECE6;
  --surface: #FFFFFF;
  --surface-raised: #FDFCF9;
  --border: #E2DED8;
  --border-subtle: #EDE9E3;
  --text: #1C1A17;
  --text-muted: #6B6761;
  --text-faint: #A8A49F;
  --accent: #1C1A17;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.07);
  --shadow: 0 2px 16px rgba(0,0,0,0.09);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.13);
  --shadow-screen: 0 12px 48px rgba(0,0,0,0.16);

  --nav-h: 64px;
  --section-gap: 100px;
  --container-w: 1160px;

  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0F0E0C;
  --bg-alt: #161410;
  --surface: #1E1C18;
  --surface-raised: #242118;
  --border: #2E2B25;
  --border-subtle: #262320;
  --text: #E6E1D8;
  --text-muted: #9A9590;
  --text-faint: #5C5850;
  --accent: #E6E1D8;

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.3);
  --shadow: 0 2px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-screen: 0 12px 48px rgba(0,0,0,0.6);
}

/* ─── RESET ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

/* ─── TYPOGRAPHY ─── */
h1, h2, h3 { font-family: var(--font-serif); line-height: 1.15; color: var(--text); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; font-family: var(--font-sans); letter-spacing: -0.01em; }
p { color: var(--text-muted); }
strong { color: var(--text); font-weight: 600; }
code { font-family: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Monaco, Consolas, monospace; }

/* ─── LAYOUT ─── */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: var(--section-gap) 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}
.section-header h2 { margin-bottom: 16px; }
.section-header p { font-size: 1.05rem; }

/* ─── LOGO ADAPTIVE ─── */
.logo-adaptive { transition: filter var(--transition); }
[data-theme="dark"] .logo-adaptive { filter: invert(1); }

/* ─── NAV ─── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: var(--bg);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.nav-logo {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.nav-name { letter-spacing: -0.01em; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--border-subtle); }
.nav-gh svg { width: 16px; height: 16px; flex-shrink: 0; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--text); background: var(--border-subtle); }
.theme-toggle svg { width: 18px; height: 18px; }
.icon-sun, .icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: none; }

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100svh;
  padding-top: calc(var(--nav-h) + 48px);
  padding-bottom: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  flex: 1;
  padding-bottom: 60px;
}
.hero-text {
  max-width: 560px;
}
.hero-logo {
  width: 72px;
  height: 72px;
  margin-bottom: 24px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 36px;
}
.hero-tagline em {
  font-style: italic;
  color: var(--text);
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.hero-meta {
  font-size: 0.82rem;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

/* ─── HERO SHOT ─── */
.hero-shot {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-shot img {
  width: auto;
  max-width: 100%;
  max-height: 540px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  display: block;
  object-fit: cover;
  object-position: top;
}


.hero-fade {
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  margin-top: -80px;
  position: relative;
  z-index: 3;
}
.section-alt ~ .hero-fade { background: linear-gradient(to bottom, transparent, var(--bg-alt)); }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn-primary {
  background: var(--text);
  color: var(--bg);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.btn-ghost {
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); background: var(--border-subtle); }
.btn-outline {
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 0.9rem;
}
.btn-outline:hover { background: var(--border-subtle); }

/* ─── FEATURES ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--border);
}
.feature-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  color: var(--text-muted);
}
.feature-icon svg { width: 100%; height: 100%; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { font-size: 0.92rem; line-height: 1.6; }

/* ─── SLIDESHOW ─── */
.slideshow { max-width: 500px; margin: 0 auto; }

.slideshow-viewport {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 4;
  position: relative;
}
.slideshow-track {
  display: flex;
  height: 100%;
  transition: transform 0.42s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}
.slide {
  flex: 0 0 100%;
  height: 100%;
}
.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

.slideshow-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 24px;
}
.slide-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  flex-shrink: 0;
}
.slide-btn svg { width: 18px; height: 18px; }
.slide-btn:hover:not(:disabled) {
  color: var(--text);
  background: var(--border-subtle);
  box-shadow: var(--shadow);
}
.slide-btn:disabled { opacity: 0.35; pointer-events: none; }

.slide-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}
.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  padding: 0;
  flex-shrink: 0;
}
.dot.active {
  background: var(--text);
  width: 20px;
  border-radius: 3px;
}
.dot:hover:not(.active) { background: var(--text-faint); }

.slide-caption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-faint);
  margin-top: 16px;
  letter-spacing: 0.02em;
  min-height: 1.4em;
  transition: opacity 0.2s;
}

/* ─── STEPS ─── */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}
.step:last-child { border-bottom: none; }
.step-num {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--border);
  line-height: 1;
  padding-top: 4px;
  transition: color var(--transition);
  user-select: none;
}
.step:hover .step-num { color: var(--text-faint); }
.step-body h3 { margin-bottom: 10px; }
.step-body p { margin-bottom: 14px; }
.step-body p:last-child { margin-bottom: 0; }

.inline-code {
  display: inline-block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text);
  font-family: 'SF Mono', 'Fira Code', Menlo, monospace;
  word-break: break-all;
}

/* ─── EXTENSIONS ─── */
.ext-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.ext-text { display: flex; flex-direction: column; gap: 16px; }
.ext-text p { font-size: 0.97rem; }
.ext-text a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border); }
.ext-text a:hover { text-decoration-color: var(--text-muted); }

.ext-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.card-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}
.code-block {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: 'SF Mono', 'Fira Code', Menlo, monospace;
  font-size: 0.82rem;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-all;
  margin-bottom: 20px;
}
.ext-steps { display: flex; flex-direction: column; gap: 12px; }
.ext-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.88rem;
}
.ext-step span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--border);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-top: 1px;
}
.ext-step p { color: var(--text-muted); margin: 0; }
.ext-step strong { color: var(--text); }

/* ─── INSTALL ─── */
.install-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.install-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: steps;
}
.install-steps li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.95rem;
  color: var(--text-muted);
  counter-increment: steps;
  position: relative;
}
.install-steps li:last-child { border-bottom: none; }
.install-steps li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-faint);
  flex-shrink: 0;
  margin-top: 1px;
}
.install-steps a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border); }
.install-steps a:hover { text-decoration-color: var(--text-muted); }
.install-steps code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.82em;
  color: var(--text);
}

.install-paths {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.path-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.device-tag {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.install-paths code {
  font-family: 'SF Mono', 'Fira Code', Menlo, monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  word-break: break-all;
}

/* ─── DISCLAIMER ─── */
.disclaimer {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  max-width: 800px;
  margin: 0 auto;
}
.disclaimer-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--text-faint);
}
.disclaimer-icon svg { width: 100%; height: 100%; }
.disclaimer h3 {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.disclaimer p {
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ─── FOOTER ─── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-right: 8px;
  flex-shrink: 0;
}
.footer-logo { width: 20px; height: 20px; }
.footer-nav {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
  flex: 1;
}
.footer-nav a {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 4px 9px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}
.footer-nav a:hover { color: var(--text); background: var(--border-subtle); }
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-faint);
  white-space: nowrap;
  margin-left: auto;
  flex-shrink: 0;
}
.footer-copy a {
  color: var(--text-faint);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
  transition: color var(--transition);
}
.footer-copy a:hover { color: var(--text-muted); }

/* ─── SCROLL REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 960px) {
  :root { --section-gap: 72px; }

  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
    padding-bottom: 0;
  }
  .hero-text { max-width: 100%; }
  .hero-logo { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-meta { text-align: center; }

  .hero-shot img { max-height: 400px; }
  .hero-fade { height: 40px; margin-top: -40px; }

  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .ext-layout, .install-layout { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 600px) {
  :root { --section-gap: 56px; --nav-h: 56px; }

  .nav-links a:not(.nav-gh) { display: none; }
  .nav-gh span { display: none; }

  .hero-screens {
    height: auto;
    gap: 6px;
    padding-bottom: 0;
  }
  .hero-screen--center { width: 130px; height: 300px; }
  .hero-screen--side { width: 100px; height: 240px; }

  .hero-shot { display: none; }
  .hero-title { font-size: clamp(2.8rem, 14vw, 3.5rem); }
  .features-grid { grid-template-columns: 1fr; }

  .step { grid-template-columns: 56px 1fr; gap: 0 16px; }
  .step-num { font-size: 2rem; }

  .disclaimer { flex-direction: column; padding: 20px; gap: 12px; }

  .footer-inner { gap: 6px; }
  .footer-copy { margin-left: 0; }
}

/* ─── SLIDESHOW CLICK HINT ─── */
.slideshow-viewport { cursor: zoom-in; }

/* ─── MODAL / LIGHTBOX ─── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: modalIn 0.18s ease;
}
.modal-backdrop[hidden] { display: none; }
@keyframes modalIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-height: 100%;
}
.modal-img {
  max-height: calc(100svh - 120px);
  max-width: min(420px, calc(100vw - 160px));
  width: auto;
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.7);
  object-fit: contain;
  animation: modalImgIn 0.22s ease;
}
@keyframes modalImgIn {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}
.modal-caption {
  color: rgba(255,255,255,0.65);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-align: center;
}
.modal-close {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  z-index: 201;
}
.modal-close:hover { background: rgba(255,255,255,0.22); }
.modal-close svg { width: 18px; height: 18px; }
.modal-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.8);
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}
.modal-nav:hover { background: rgba(255,255,255,0.2); color: #fff; }
.modal-nav svg { width: 22px; height: 22px; }

@media (max-width: 600px) {
  .modal-nav { display: none; }
  .modal-img { max-width: calc(100vw - 32px); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .slideshow-track { transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}