/* ============================================
   SYNC AS AGREEMENT — Website Styles
   ============================================ */

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

:root {
  --bg: #060608;
  --bg-elevated: #0e0e12;
  --bg-card: #12121a;
  --text: #e0ddd8;
  --text-dim: #8a8780;
  --text-muted: #5a5854;
  --accent-sound: #e8a04c;
  --accent-visual: #5c8aed;
  --accent-agreement: #ffffff;
  --accent-sound-dim: rgba(232, 160, 76, 0.15);
  --accent-visual-dim: rgba(92, 138, 237, 0.15);
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(255, 255, 255, 0.12);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --content-width: 800px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection {
  background: rgba(92, 138, 237, 0.3);
  color: #fff;
}

a {
  color: var(--accent-visual);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-agreement);
}

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 200;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 1.5rem;
  color: var(--text);
}

h3 {
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.2rem;
  color: var(--text);
}

.text-dim { color: var(--text-dim); }
.text-muted { color: var(--text-muted); }
.text-sound { color: var(--accent-sound); }
.text-visual { color: var(--accent-visual); }
.text-white { color: var(--accent-agreement); }

small {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.container--narrow {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
  position: relative;
}

section + section {
  border-top: 1px solid var(--border);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  section { padding: 4rem 0; }
}

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(6, 6, 8, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}

nav .nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

nav .nav-logo {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
}

nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav .nav-links a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}

nav .nav-links a:hover,
nav .nav-links a.active {
  color: var(--text);
}

nav .nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent-visual);
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-hamburger { display: block; }
  nav .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(6, 6, 8, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }
  nav .nav-links.open { display: flex; }
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 60px;
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 300;
  color: var(--text-dim);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-meta {
  display: flex;
  gap: 2rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.4;
}

/* --- Section Label --- */
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  transition: border-color 0.3s, transform 0.3s;
}

.card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.card-label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.card h4 {
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
  color: var(--accent-agreement);
}

.card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.card--sound { border-left: 2px solid var(--accent-sound); }
.card--visual { border-left: 2px solid var(--accent-visual); }
.card--agreement { border-left: 2px solid var(--accent-agreement); }

/* --- Diagram --- */
.diagram {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3rem 2rem;
  text-align: center;
  margin: 2.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  overflow-x: auto;
}

.diagram-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.diagram-node {
  padding: 0.8rem 1.5rem;
  border-radius: 6px;
  font-weight: 500;
  white-space: nowrap;
}

.diagram-node--sound {
  background: var(--accent-sound-dim);
  color: var(--accent-sound);
  border: 1px solid rgba(232, 160, 76, 0.3);
}

.diagram-node--visual {
  background: var(--accent-visual-dim);
  color: var(--accent-visual);
  border: 1px solid rgba(92, 138, 237, 0.3);
}

.diagram-node--ir {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-agreement);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.diagram-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent-sound), var(--accent-visual));
  opacity: 0.3;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  transform: translateX(-3px);
}

.timeline-item.active::before {
  background: var(--accent-agreement);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* --- Tags --- */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.tag--sound {
  background: var(--accent-sound-dim);
  color: var(--accent-sound);
  border-color: rgba(232, 160, 76, 0.2);
}

.tag--visual {
  background: var(--accent-visual-dim);
  color: var(--accent-visual);
  border-color: rgba(92, 138, 237, 0.2);
}

/* --- Table --- */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-accent);
  font-weight: 500;
}

tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: top;
}

tbody tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* --- Stat --- */
.stat {
  text-align: center;
  padding: 2rem 1rem;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 200;
  color: var(--accent-agreement);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* --- Blockquote --- */
blockquote {
  border-left: 2px solid var(--accent-visual);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--text);
  font-style: italic;
}

blockquote cite {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: normal;
  margin-top: 0.75rem;
}

/* --- Code Block --- */
.code-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-dim);
  overflow-x: auto;
  margin: 1.5rem 0;
}

.code-block .key { color: var(--accent-visual); }
.code-block .val { color: var(--accent-sound); }
.code-block .comment { color: var(--text-muted); }

/* --- Artist Profile --- */
.artist-section {
  padding: 6rem 0;
}

.artist-header {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 3rem;
}

.artist-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.artist-photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 100;
  color: var(--text-muted);
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
}

.artist-name {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 200;
  margin-bottom: 0.5rem;
}

.artist-role {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.artist-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.artist-link {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  transition: all 0.2s;
}

.artist-link:hover {
  border-color: var(--accent-visual);
  color: var(--accent-visual);
}

@media (max-width: 768px) {
  .artist-header {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .artist-photo {
    margin: 0 auto;
    width: 150px;
    height: 150px;
  }
  .artist-links { justify-content: center; }
}

/* --- Footer --- */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* --- Utilities --- */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 3rem; }

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Animated Background --- */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image:
    linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-content {
  position: relative;
  z-index: 1;
}

/* --- Zone Cards --- */
.zone-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .zone-grid { grid-template-columns: 1fr; }
}

.zone-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s;
}

.zone-card:hover {
  border-color: var(--border-accent);
}

.zone-card::before {
  content: attr(data-zone);
  position: absolute;
  top: -10px;
  right: 1rem;
  font-size: 5rem;
  font-weight: 200;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
}

.zone-card h4 {
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.zone-card p {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* --- Layer Stack --- */
.layer-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 2rem 0;
}

.layer {
  padding: 1.2rem 1.5rem;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: background 0.2s;
}

.layer:first-child { border-radius: 8px 8px 0 0; }
.layer:last-child { border-radius: 0 0 8px 8px; }
.layer + .layer { border-top: none; }

.layer:hover { background: rgba(255, 255, 255, 0.02); }

.layer-badge {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  min-width: 80px;
  text-align: center;
  font-weight: 500;
}

.layer-badge--ir {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.layer-badge--osc {
  background: var(--accent-sound-dim);
  color: var(--accent-sound);
}

.layer-badge--sync {
  background: var(--accent-visual-dim);
  color: var(--accent-visual);
}

.layer-text {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* --- Mapping Table Special --- */
.mapping-row {
  display: grid;
  grid-template-columns: 1fr 40px 1fr 80px;
  gap: 0.5rem;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.mapping-arrow {
  text-align: center;
  color: var(--text-muted);
}

.mapping-badge {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
  text-align: center;
}

.mapping-badge--high {
  background: rgba(76, 232, 133, 0.15);
  color: #4ce885;
}

/* --- Bilingual --- */
.ja { font-family: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', var(--font-body); }

.bilingual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

@media (max-width: 768px) {
  .bilingual { grid-template-columns: 1fr; gap: 1rem; }
}

/* --- Works List --- */
.works-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.work-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.work-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-top: 0.15rem;
}

.work-title {
  font-weight: 400;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.work-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
}