/* ==========================================================================
   DAVIDE MASSERINI — OFFICIAL DESIGN SYSTEM & STYLESHEET
   Concept: "Light emerging from darkness"
   Visual Registers: Cinematic (Void/Teal/Magenta/Crimson) & Illustrative (Amber/Cyan/Starlight)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Dark Void & Surfaces */
  --bg-void: #05070B;
  --bg-deep: #0A0F17;
  --bg-surface: #11161F;
  --bg-surface-elevated: #161E2A;
  --bg-surface-glass: rgba(17, 22, 31, 0.78);
  --bg-surface-card: rgba(22, 30, 42, 0.7);
  --bg-line: #1C2430;
  --bg-line-bright: #2B374A;
  --bg-line-glow: rgba(61, 169, 252, 0.25);

  /* Illustrative Register (Knowledge, Connection, Human Presence) */
  --amber-core: #F5A623;
  --amber-bright: #FFC861;
  --amber-ember: #C97A16;
  --amber-glow: rgba(245, 166, 35, 0.15);
  --amber-glow-strong: rgba(245, 166, 35, 0.35);
  --cyan-node: #3DA9FC;
  --cyan-dim: #1C5D8C;
  --cyan-glow: rgba(61, 169, 252, 0.18);
  --starlight: #7FD4FF;

  /* Cinematic Register (Portraits, Homepage Video, Scrims) */
  --teal-rim: #2FE0C9;
  --teal-glow: rgba(47, 224, 201, 0.2);
  --magenta-rim: #E8397E;
  --magenta-glow: rgba(232, 57, 126, 0.2);
  --crimson-deep: #5B1030;
  --crimson-scrim: rgba(91, 16, 48, 0.45);

  /* Text & Hierarchy */
  --text-primary: #F4F6F9;
  --text-secondary: #9AA5B4;
  --text-muted: #5C6675;
  --text-inverse: #05070B;

  /* Typography */
  --font-display: 'Cinzel', 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Newsreader', 'Cormorant Garamond', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Space Mono', Consolas, monospace;

  /* Spatial & UI Scale */
  --container-max: 1200px;
  --container-reading: 720px;
  --header-height: 72px;
  --radius-xs: 3px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. RESET & BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  color-scheme: dark;
  background-color: var(--bg-void);
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-void);
  line-height: 1.65;
  font-weight: 400;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.menu-open {
  overflow: hidden;
  touch-action: none;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. ACCESSIBILITY & FOCUS
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1.5rem;
  background: var(--amber-core);
  color: var(--bg-void);
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 10000;
  transition: top var(--transition-fast);
}

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

:focus-visible {
  outline: 2px solid var(--amber-core);
  outline-offset: 3px;
}

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

/* --------------------------------------------------------------------------
   4. TYPOGRAPHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 400;
  line-height: 1.2;
}

.font-display {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}

.font-serif {
  font-family: var(--font-serif);
  font-style: italic;
}

.font-mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.headline-hero {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 400;
  letter-spacing: 0.05em;
  line-height: 1.1;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.8);
}

.headline-section {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  letter-spacing: 0.03em;
  margin-bottom: 1rem;
}

.headline-page {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.subtitle-hero {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.6;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--amber-core);
  margin-bottom: 1rem;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--amber-core);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--amber-core);
}

.eyebrow.cyan {
  color: var(--cyan-node);
}
.eyebrow.cyan::before {
  background-color: var(--cyan-node);
  box-shadow: 0 0 8px var(--cyan-node);
}

.quote-reflective {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  color: #E2E8F0;
  line-height: 1.6;
  border-left: 2px solid var(--amber-core);
  padding-left: 1.5rem;
  margin: 2rem 0;
}

/* --------------------------------------------------------------------------
   5. LAYOUT & CONTAINERS
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.container-reading {
  width: 100%;
  max-width: var(--container-reading);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
}

.page-wrapper {
  flex: 1 0 auto;
  position: relative;
  z-index: 1;
}

.page-hero {
  padding-top: calc(var(--header-height) + 4rem);
  padding-bottom: 3.5rem;
  position: relative;
  border-bottom: 1px solid var(--bg-line);
  background: radial-gradient(circle at 50% 0%, rgba(28, 93, 140, 0.12) 0%, transparent 70%);
}

.page-content {
  padding: 4rem 0 6rem;
}

/* --------------------------------------------------------------------------
   6. GLOBAL NAVIGATION & HEADER
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal),
              backdrop-filter var(--transition-normal),
              box-shadow var(--transition-normal);
}

.site-header.scrolled {
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--bg-line);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  font-weight: 500;
}

.brand-dot {
  width: 7px;
  height: 7px;
  background-color: var(--amber-core);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--amber-core);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.site-brand:hover .brand-dot {
  transform: scale(1.3);
  box-shadow: 0 0 14px var(--amber-bright);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--amber-core);
  transition: width var(--transition-normal);
  box-shadow: 0 0 6px var(--amber-core);
}

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

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  width: 100%;
}

.nav-link[aria-current="page"] {
  color: var(--amber-bright);
  font-weight: 500;
}

/* Nav Action Button */
.nav-action-btn {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  padding: 0.5rem 1.1rem;
  color: var(--amber-core);
  border: 1px solid rgba(245, 166, 35, 0.4);
  border-radius: var(--radius-pill);
  background: rgba(245, 166, 35, 0.05);
  transition: all var(--transition-fast);
}

.nav-action-btn:hover {
  background: rgba(245, 166, 35, 0.15);
  border-color: var(--amber-core);
  box-shadow: 0 0 16px rgba(245, 166, 35, 0.25);
  color: var(--amber-bright);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-sm);
  z-index: 1001;
}

.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.mobile-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(5, 7, 11, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 999;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-drawer.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.mobile-nav-link {
  font-family: var(--font-display);
  font-size: 1.75rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link[aria-current="page"] {
  color: var(--amber-core);
}

/* --------------------------------------------------------------------------
   7. HOMEPAGE SCROLL-DRIVEN VIDEO THEATER
   -------------------------------------------------------------------------- */
.home-story-track {
  position: relative;
  height: 600vh;
  background-color: transparent !important;
}

.home-video-stage {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}

.home-bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  opacity: 0.92;
  transition: opacity var(--transition-normal);
}

.home-poster-fallback {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  opacity: 0;
  transition: opacity var(--transition-slow);
  z-index: 1;
}

.home-video-stage.use-poster .home-poster-fallback {
  opacity: 0.92;
}

.home-video-stage.use-poster .home-bg-video {
  display: none;
}

/* Dynamic Cinematic Scrims (Ensures text legibility without burying the face) */
.home-scrim-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 80% 40%, rgba(91, 16, 48, 0.18) 0%, transparent 65%),
    linear-gradient(180deg, rgba(5, 7, 11, 0.4) 0%, rgba(5, 7, 11, 0.1) 40%, rgba(5, 7, 11, 0.7) 100%),
    linear-gradient(90deg, rgba(5, 7, 11, 0.85) 0%, rgba(5, 7, 11, 0.4) 45%, transparent 85%);
  transition: background var(--transition-normal);
}

/* Homepage Narrative Panels Container */
.home-panels-container {
  position: relative;
  z-index: 10;
  width: 100%;
  background: transparent !important;
  pointer-events: none;
}

.home-panel {
  min-height: 120vh;
  min-height: 120svh;
  display: flex;
  align-items: center;
  padding: 6rem 0;
  box-sizing: border-box;
}

.home-panel-inner {
  pointer-events: auto;
  max-width: 600px;
  background: rgba(5, 7, 11, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--bg-line);
  padding: clamp(1.75rem, 4vw, 3rem);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(28, 93, 140, 0.1);
  position: relative;
  overflow: hidden;
}

.home-panel-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--amber-core), var(--cyan-node), transparent);
}

/* Panel Layout Variants */
.home-panel.pos-left .home-panel-inner {
  margin-right: auto;
}

.home-panel.pos-right .home-panel-inner {
  margin-left: auto;
}

.home-panel.pos-center .home-panel-inner {
  margin: 0 auto;
  max-width: 760px;
}

/* Hero Section Special */
.home-panel-hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.home-hero-card {
  pointer-events: auto;
  max-width: 640px;
  padding: 2.5rem 0;
}

.home-hero-card .headline-hero {
  margin-bottom: 1.25rem;
}

.home-hero-card .subtitle-hero {
  margin-bottom: 2rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  pointer-events: auto;
  transition: opacity var(--transition-normal);
}

.scroll-mouse {
  width: 20px;
  height: 32px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.scroll-wheel {
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 6px;
  background-color: var(--amber-core);
  border-radius: 2px;
  animation: scrollPulse 1.8s infinite;
}

@keyframes scrollPulse {
  0% { transform: translate(-50%, 0); opacity: 1; }
  100% { transform: translate(-50%, 12px); opacity: 0; }
}

/* --------------------------------------------------------------------------
   8. BUTTONS & INTERACTIVE ELEMENTS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--amber-core);
  color: var(--bg-void);
  border: 1px solid var(--amber-core);
  box-shadow: 0 4px 18px rgba(245, 166, 35, 0.25);
}

.btn-primary:hover {
  background: var(--amber-bright);
  border-color: var(--amber-bright);
  box-shadow: 0 6px 24px rgba(245, 166, 35, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(22, 30, 42, 0.6);
  color: var(--text-primary);
  border: 1px solid var(--bg-line);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: var(--cyan-node);
  color: var(--cyan-node);
  background: rgba(61, 169, 252, 0.08);
  box-shadow: 0 0 18px rgba(61, 169, 252, 0.2);
  transform: translateY(-1px);
}

.btn-text {
  padding: 0.5rem 0;
  color: var(--amber-core);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.btn-text:hover {
  color: var(--amber-bright);
  gap: 0.8rem;
}

/* --------------------------------------------------------------------------
   9. SYSTEM NODE & CONNECTED ARCHITECTURE CARDS (Work & Systems)
   -------------------------------------------------------------------------- */
.system-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.system-card {
  background: var(--bg-surface-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  overflow: hidden;
}

.system-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan-node);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 20px var(--cyan-glow);
}

.system-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--cyan-node);
  opacity: 0.6;
}

.system-card.amber-accent::before {
  background: var(--amber-core);
  opacity: 0.8;
}

.system-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.system-card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.03em;
  color: var(--text-primary);
}

.system-card-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(61, 169, 252, 0.1);
  color: var(--cyan-node);
  border: 1px solid rgba(61, 169, 252, 0.3);
}

.system-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--bg-line);
  color: var(--text-secondary);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.tech-badge:hover {
  border-color: var(--amber-core);
  color: var(--amber-bright);
}

/* --------------------------------------------------------------------------
   10. ABOUT PAGE & EDITORIAL LONGFORM
   -------------------------------------------------------------------------- */
.editorial-prose {
  color: #D1D8E0;
  font-size: 1.08rem;
  line-height: 1.8;
}

.editorial-prose p {
  margin-bottom: 1.6rem;
}

.editorial-prose p:last-child {
  margin-bottom: 0;
}

.editorial-prose h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  letter-spacing: 0.03em;
  margin: 3.5rem 0 1.25rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.editorial-prose h2::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 2px;
  background-color: var(--amber-core);
}

.about-family-figure {
  margin: 3.5rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--bg-line);
  background: var(--bg-deep);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(245, 166, 35, 0.08);
}

.about-family-img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.about-family-caption {
  padding: 1rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border-top: 1px solid var(--bg-line);
  text-align: center;
}

.history-callout {
  background: rgba(22, 30, 42, 0.75);
  border-left: 3px solid var(--cyan-node);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.5rem 1.75rem;
  margin: 2.5rem 0;
  font-size: 0.98rem;
  color: var(--text-secondary);
}

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

/* --------------------------------------------------------------------------
   11. BOOKS PAGE (LIBRARY, FILTERS & LIST)
   -------------------------------------------------------------------------- */
.library-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-md);
  margin-bottom: 2.5rem;
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--bg-line);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.filter-pill:hover {
  border-color: var(--amber-core);
  color: var(--text-primary);
}

.filter-pill.active {
  background: var(--amber-core);
  border-color: var(--amber-core);
  color: var(--bg-void);
  font-weight: 600;
}

.filter-pill-count {
  font-size: 0.72rem;
  opacity: 0.8;
}

.library-search-box {
  position: relative;
  min-width: 240px;
}

.library-search-input {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.5rem 0.9rem 0.5rem 2.2rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.library-search-input:focus {
  border-color: var(--cyan-node);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.books-category-section {
  margin-bottom: 3.5rem;
}

.books-category-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--bg-line);
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
}

.books-category-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: 0.03em;
  color: var(--text-primary);
}

.books-category-note {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1.5rem;
  line-height: 1.5;
  background: rgba(22, 30, 42, 0.5);
  padding: 0.9rem 1.2rem;
  border-left: 2px solid var(--cyan-dim);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.book-card {
  background: var(--bg-surface);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;
  transition: all var(--transition-fast);
  position: relative;
}

.book-card:hover {
  border-color: var(--amber-core);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4), 0 0 15px var(--amber-glow);
}

.book-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.35;
}

.book-author {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.book-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  border-top: 1px solid var(--bg-line);
  padding-top: 0.5rem;
  margin-top: 0.25rem;
}

.audiobook-badge {
  color: var(--amber-bright);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* --------------------------------------------------------------------------
   12. MUSIC PAGE (ATMOSPHERIC SOUNDTRACK)
   -------------------------------------------------------------------------- */
.music-room {
  background: radial-gradient(circle at 50% 30%, rgba(61, 169, 252, 0.08) 0%, rgba(5, 7, 11, 0.95) 75%);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 4rem);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), 0 0 40px rgba(61, 169, 252, 0.08);
  margin-top: 2rem;
}

.spotify-frame-wrapper {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--bg-line-bright);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
  margin-top: 2.5rem;
}

.spotify-frame-wrapper iframe {
  width: 100%;
  min-height: 480px;
  border: 0;
}

/* --------------------------------------------------------------------------
   13. CONTACT PAGE & DIRECT PATHWAYS
   -------------------------------------------------------------------------- */
.contact-pathways-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
  margin: 3rem 0;
}

.contact-card {
  background: var(--bg-surface-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  transition: all var(--transition-fast);
  position: relative;
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--amber-core);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 25px var(--amber-glow);
}

.contact-card.cyan-card:hover {
  border-color: var(--cyan-node);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 25px var(--cyan-glow);
}

.contact-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
}

.contact-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.contact-value-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
}

.copy-btn {
  color: var(--amber-core);
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-xs);
  background: rgba(245, 166, 35, 0.1);
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--amber-core);
  color: var(--bg-void);
}

/* Toast alert */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--amber-core);
  color: var(--bg-void);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 10000;
  pointer-events: none;
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   14. EXPLORE INDEX GRID (Homepage Section 5)
   -------------------------------------------------------------------------- */
.explore-index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.explore-index-row {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem 1.75rem;
  background: rgba(17, 22, 31, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--bg-line);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.explore-index-row:hover {
  border-color: var(--amber-core);
  transform: translateX(6px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4), 0 0 20px var(--amber-glow);
}

.explore-row-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

.explore-row-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.explore-row-arrow {
  color: var(--amber-core);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  transition: transform var(--transition-fast);
}

.explore-index-row:hover .explore-row-arrow {
  transform: translateX(4px);
  color: var(--amber-bright);
}

/* --------------------------------------------------------------------------
   15. GLOBAL FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--bg-line);
  background-color: var(--bg-void);
  padding: 4.5rem 0 3rem;
  position: relative;
  z-index: 10;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.footer-tagline {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 420px;
  line-height: 1.6;
}

.footer-location {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan-node);
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-nav-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--amber-core);
}

.footer-bottom {
  border-top: 1px solid var(--bg-line);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-evolving-quote {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   16. REDUCED MOTION & RESPONSIVE OVERRIDES
   -------------------------------------------------------------------------- */
@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;
  }

  .home-story-track {
    height: auto !important;
  }

  .home-video-stage {
    position: relative !important;
    height: 60vh !important;
  }

  .home-bg-video {
    display: none !important;
  }

  .home-poster-fallback {
    opacity: 0.92 !important;
  }

  .home-panel {
    min-height: auto !important;
    padding: 3rem 0 !important;
  }
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .explore-index-row {
    grid-template-columns: 120px 1fr auto;
    gap: 1rem;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .mobile-toggle, .mobile-drawer {
    display: flex;
  }

  .home-panel {
    min-height: 100vh;
    min-height: 100svh;
    padding: 4rem 0;
  }

  .home-panel-inner {
    max-width: 100% !important;
    margin: 0 !important;
    padding: 1.5rem;
  }

  .explore-index-row {
    grid-template-columns: 1fr auto;
  }

  .explore-row-desc {
    grid-column: 1 / -1;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .headline-hero {
    font-size: 2.2rem;
  }
  .btn {
    width: 100%;
  }
  .cta-group {
    flex-direction: column;
    width: 100%;
  }
}