/* ═══════════════════════════════════════════════════
   拾墨 (ShiMo) — Official Website Design System
   Aesthetic: Dark stone + warm ink glow
   ═══════════════════════════════════════════════════ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@200;300;400;500;600;700;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ── */
:root {
  /* Colors — Dark Stone Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(17, 17, 24, 0.72);

  /* Ink Warm Glow */
  --ink-warm: #f5e6c8;
  --ink-warm-dim: #c4a882;
  --ink-warm-glow: rgba(245, 230, 200, 0.15);
  --ink-gold: #d4a574;
  --ink-amber: #c49a6c;

  /* Text */
  --text-primary: #e8e0d4;
  --text-secondary: rgba(232, 224, 212, 0.6);
  --text-tertiary: rgba(232, 224, 212, 0.35);
  --text-accent: var(--ink-warm);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(245, 230, 200, 0.12);

  /* Gradients */
  --grad-warm: linear-gradient(135deg, #c49a6c 0%, #d4a574 50%, #f5e6c8 100%);
  --grad-dark: linear-gradient(180deg, #0a0a0f 0%, #111118 50%, #0d0d14 100%);
  --grad-hero: radial-gradient(ellipse at 50% 30%, rgba(212, 165, 116, 0.08) 0%, transparent 70%);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Typography */
  --font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-glow: 0 0 80px rgba(245, 230, 200, 0.04), 0 0 30px rgba(212, 165, 116, 0.08);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.1), 0 12px 32px rgba(0, 0, 0, 0.3);
  --shadow-elevation: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.05);

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 600ms;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Subtle noise overlay for a tactile, artisanal "ink and paper" feel */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  background-image: url('data:image/svg+xml;utf8,%3Csvg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noiseFilter"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.65" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noiseFilter)"/%3E%3C/svg%3E');
  opacity: 0.04;
  pointer-events: none;
}

::selection {
  background: rgba(212, 165, 116, 0.25);
  color: var(--ink-warm);
}

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

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

/* ── Utility ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }
.reveal-delay-6 { transition-delay: 600ms; }

/* ═══════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
  transition: background var(--duration-normal) var(--ease-out),
              backdrop-filter var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--border-subtle);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 20px rgba(212, 165, 116, 0.15);
}

.nav-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink-warm);
  letter-spacing: 0.05em;
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--ink-warm);
  transition: width var(--duration-normal) var(--ease-out);
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* ═══════════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--space-3xl) 0;
}

/* Background layers */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-hero);
  z-index: 0;
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--space-md);
}

.hero-icon-wrapper {
  position: relative;
  display: inline-block;
  margin-bottom: var(--space-lg);
}

.hero-icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-xl);
  box-shadow:
    0 0 0 1px rgba(245, 230, 200, 0.1),
    0 0 60px rgba(212, 165, 116, 0.2),
    0 0 120px rgba(212, 165, 116, 0.08);
  animation: icon-float 6s ease-in-out infinite;
  transition: transform var(--duration-normal) var(--ease-spring);
}

.hero-icon:hover {
  transform: scale(1.05);
}

.hero-icon-glow {
  position: absolute;
  inset: -40px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 165, 116, 0.12) 0%, transparent 70%);
  animation: glow-pulse 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes icon-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  color: var(--ink-warm);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  text-shadow: 0 0 40px rgba(212, 165, 116, 0.2);
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  margin-bottom: var(--space-lg);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 540px;
  margin: 0 auto var(--space-xl);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.12) 0%, rgba(212, 165, 116, 0.03) 100%);
  color: var(--ink-warm);
  border: 1px solid rgba(212, 165, 116, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.btn-primary:hover {
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.2) 0%, rgba(212, 165, 116, 0.08) 100%);
  border-color: rgba(212, 165, 116, 0.5);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(212, 165, 116, 0.15), inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-accent);
}

.btn-ghost:hover {
  color: var(--ink-warm);
  border-color: var(--ink-warm-dim);
  background: rgba(245, 230, 200, 0.05);
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-tertiary);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  animation: scroll-hint 2s ease-in-out infinite;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--ink-warm-dim), transparent);
  animation: scroll-line-anim 2s ease-in-out infinite;
}

@keyframes scroll-hint {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

@keyframes scroll-line-anim {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ═══════════════════════════════════════════════════
   FEATURES SECTION
   ═══════════════════════════════════════════════════ */

.features {
  padding: var(--space-3xl) 0;
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-gold);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

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

.feature-card {
  position: relative;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-warm);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(212, 165, 116, 0.08);
  border: 1px solid rgba(212, 165, 116, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 1.4rem;
  color: var(--ink-gold);
  transition: all var(--duration-normal) var(--ease-out);
}

.feature-card:hover .feature-icon {
  background: rgba(212, 165, 116, 0.12);
  box-shadow: 0 0 20px rgba(212, 165, 116, 0.1);
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  letter-spacing: 0.03em;
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ═══════════════════════════════════════════════════
   SHOWCASE SECTION
   ═══════════════════════════════════════════════════ */

.showcase {
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.showcase::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(212, 165, 116, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.showcase-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.showcase-text {
  max-width: 480px;
}

.showcase-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-gold);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.showcase-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.showcase-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.showcase-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.showcase-list .check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(212, 165, 116, 0.1);
  border: 1px solid rgba(212, 165, 116, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: var(--ink-gold);
  margin-top: 2px;
}

.showcase-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Phone mockup */
.phone-mockup {
  position: relative;
  width: 280px;
  height: 560px;
  border-radius: 36px;
  background: var(--bg-secondary);
  border: 2px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 0 0 6px rgba(0, 0, 0, 0.3),
    var(--shadow-elevation),
    0 0 80px rgba(212, 165, 116, 0.08);
  overflow: hidden;
  transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
  transition: transform var(--duration-slow) var(--ease-out);
}

.phone-mockup:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

/* Phone notch */
.phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: var(--bg-primary);
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

/* Phone screen content */
.phone-screen {
  width: 100%;
  height: 100%;
  padding: 40px 16px 20px;
  display: flex;
  flex-direction: column;
  background: linear-gradient(170deg, #14141e 0%, #0d0d14 100%);
}

.phone-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.phone-header-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--ink-warm);
  font-weight: 600;
}

.phone-header-dots {
  display: flex;
  gap: 4px;
}

.phone-header-dots span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-tertiary);
}

.phone-search {
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.phone-books {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  flex: 1;
  padding-bottom: 10px;
}

.phone-book {
  border-radius: 4px;
  aspect-ratio: 2/3;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 2px 4px 12px rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-book::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  box-shadow: inset 1px 0 2px rgba(255,255,255,0.2), inset -1px 0 2px rgba(0,0,0,0.3);
  z-index: 2;
}

.phone-book::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, transparent 100%);
  z-index: 1;
  pointer-events: none;
}

/* Exquisite elegant Japanese/traditional colored book covers */
.phone-book:nth-child(1) { background: #3c3431; }
.phone-book:nth-child(2) { background: #2f3638; }
.phone-book:nth-child(3) { background: #3d352b; }
.phone-book:nth-child(4) { background: #2c3834; }
.phone-book:nth-child(5) { background: #3b3034; }
.phone-book:nth-child(6) { background: #2b353a; }

.phone-book-title {
  position: absolute;
  font-family: var(--font-serif);
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.85);
  z-index: 2;
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 0.15em;
  padding: 6px 0;
}

.phone-nav {
  display: flex;
  justify-content: space-around;
  padding: 12px 0 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  background: rgba(13, 13, 20, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin: auto -16px -20px;
  position: relative;
  z-index: 10;
}

.phone-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.55rem;
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
}

.phone-nav-item.active {
  color: var(--ink-warm);
}

.phone-nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ═══════════════════════════════════════════════════
   FORMATS SECTION
   ═══════════════════════════════════════════════════ */

.formats {
  padding: var(--space-3xl) 0;
  text-align: center;
}

.formats-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  margin-top: var(--space-xl);
}

.format-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
  min-width: 100px;
}

.format-badge:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.format-ext {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--grad-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.format-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

/* ═══════════════════════════════════════════════════
   CTA SECTION
   ═══════════════════════════════════════════════════ */

.cta {
  padding: var(--space-3xl) 0;
  position: relative;
}

.cta-card {
  position: relative;
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(212, 165, 116, 0.06) 0%, rgba(212, 165, 116, 0.02) 100%);
  border: 1px solid var(--border-accent);
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(212, 165, 116, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  position: relative;
}

.cta-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

/* ═══════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════ */

.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--border-subtle);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  opacity: 0.7;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  transition: color var(--duration-fast);
}

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

/* ═══════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════ */

@media (max-width: 968px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .showcase-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .showcase-text {
    max-width: 100%;
  }

  .showcase-visual {
    order: -1;
  }

  .phone-mockup {
    transform: none;
    width: 240px;
    height: 480px;
  }

  .phone-mockup:hover {
    transform: none;
  }

  .showcase-list li {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

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

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-icon {
    width: 90px;
    height: 90px;
  }

  .formats-row {
    gap: var(--space-sm);
  }

  .format-badge {
    padding: var(--space-sm) var(--space-md);
    min-width: 80px;
  }

  .footer .container {
    flex-direction: column;
    text-align: center;
  }

  .phone-mockup {
    width: 200px;
    height: 400px;
    border-radius: 28px;
  }

  .phone-notch {
    width: 90px;
    height: 22px;
  }
}

/* ═══════════════════════════════════════════════════
   TOAST OVERLAY
   ═══════════════════════════════════════════════════ */

.toast-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  pointer-events: none;
  opacity: 0;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.toast-overlay.active {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  pointer-events: all;
  opacity: 1;
}

.toast-card {
  text-align: center;
  padding: var(--space-xl) var(--space-2xl);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(20, 20, 30, 0.95), rgba(15, 15, 22, 0.98));
  border: 1px solid var(--border-accent);
  box-shadow:
    0 0 0 1px rgba(245, 230, 200, 0.05),
    0 24px 80px rgba(0, 0, 0, 0.5),
    0 0 120px rgba(212, 165, 116, 0.06);
  max-width: 380px;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast-overlay.active .toast-card {
  transform: scale(1) translateY(0);
}

.toast-icon-ring {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(212, 165, 116, 0.08);
  border: 1px solid rgba(212, 165, 116, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  color: var(--ink-gold);
}

.toast-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink-warm);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.toast-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.toast-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 2.5rem;
  border-radius: var(--radius-full);
  background: rgba(212, 165, 116, 0.1);
  border: 1px solid rgba(212, 165, 116, 0.2);
  color: var(--ink-warm);
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}

.toast-close:hover {
  background: rgba(212, 165, 116, 0.18);
  border-color: rgba(212, 165, 116, 0.35);
  transform: translateY(-1px);
}

/* ═══════════════════════════════════════════════════
   AMBIENT TEXTURE OVERLAY
   ═══════════════════════════════════════════════════ */

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.025'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}