/* ===== CSS Variables ===== */
:root {
  --color-bg: #0a0a0f;
  --color-bg-secondary: #111118;
  --color-bg-card: #16161f;
  --color-primary: #c9a84c;
  --color-primary-light: #e4c96a;
  --color-primary-glow: rgba(201, 168, 76, 0.15);
  --color-accent: #6b4ce0;
  --color-accent-light: #8a6ef0;
  --color-text: #f0ede6;
  --color-text-muted: #9a968e;
  --color-text-dim: #5e5b54;
  --color-border: rgba(201, 168, 76, 0.12);
  --font-display: 'Playfair Display', serif;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: all 0.3s ease; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 3rem);
}

/* ===== Scroll Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== Skip Nav ===== */
.skip-nav {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-primary);
  color: var(--color-bg);
  padding: 0.75rem 1.5rem;
  z-index: 10000;
  font-weight: 700;
}
.skip-nav:focus { top: 0; }

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.4s ease;
}
header.scrolled {
  padding: 0.6rem 0;
  background: rgba(10, 10, 15, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo-img {
  height: 40px;
  width: auto;
  filter: invert(1);
  transition: opacity 0.3s ease;
}
.logo-img:hover { opacity: 0.85; }

nav ul {
  display: flex;
  gap: 2rem;
  align-items: center;
}
nav a {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s var(--ease-out-expo);
}
nav a:hover { color: var(--color-text); }
nav a:hover::after { width: 100%; }
nav a.active { color: var(--color-primary); }
nav a.active::after { width: 100%; }

.nav-cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-bg) !important;
  padding: 0.6rem 1.5rem;
  border-radius: 100px;
  font-weight: 600 !important;
  font-size: 0.75rem !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { transform: scale(1.05); box-shadow: 0 4px 20px var(--color-primary-glow); }

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}
.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

/* ===== Page Hero (Sub pages) ===== */
.page-hero {
  padding: 10rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(201, 168, 76, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(107, 76, 224, 0.06) 0%, transparent 70%);
}
.page-hero .section-tag,
.page-hero h1,
.page-hero p { position: relative; z-index: 1; }

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--color-text) 30%, var(--color-primary) 70%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero p {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 2;
}

/* ===== Section Common ===== */
section {
  padding: clamp(4rem, 10vw, 8rem) 0;
  position: relative;
}

.section-tag {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 600px;
  line-height: 2;
  font-weight: 300;
}

.section-divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  margin: 1.5rem 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  border-radius: 100px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: all 0.4s var(--ease-out-expo);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-bg);
  box-shadow: 0 4px 30px var(--color-primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(201, 168, 76, 0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ===== Cards ===== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3);
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.card:hover::before { opacity: 1; }

/* ===== Content Prose ===== */
.prose { max-width: 800px; margin: 0 auto; }
.prose p {
  color: var(--color-text-muted);
  line-height: 2;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.prose h3 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}
.prose strong { color: var(--color-text); }

/* ===== CTA Section ===== */
.cta-section {
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--color-primary-glow) 0%, transparent 60%);
}
.cta-section h2,
.cta-section p,
.cta-section .btn { position: relative; z-index: 1; }
.cta-section p {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  font-size: 1rem;
}

/* ===== Footer ===== */
footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

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

.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand p {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  line-height: 1.8;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-dim);
  padding: 0.3rem 0;
}
.footer-col a:hover { color: var(--color-primary); }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* ===== Grid Layouts ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }

/* ===== Specific Components ===== */

/* FAQ */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item:hover { border-color: rgba(201, 168, 76, 0.3); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  background: none;
  border: none;
  color: var(--color-text);
  width: 100%;
  text-align: left;
}
.faq-question .faq-icon {
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 1rem;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out-expo), padding 0.3s ease;
  padding: 0 1.5rem;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 1.5rem 1.5rem; }
.faq-answer p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 2; }

/* News list */
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
  transition: all 0.3s ease;
}
.news-item:hover { padding-left: 1rem; }
.news-date {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  white-space: nowrap;
  min-width: 100px;
  padding-top: 0.15rem;
}
.news-tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  font-family: var(--font-heading);
  letter-spacing: 0.05em;
  margin-right: 0.75rem;
}
.news-title {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}
.news-item:hover .news-title { color: var(--color-text); }

/* Producer cards */
.producer-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-glow), rgba(107, 76, 224, 0.15));
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.producer-artists {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  line-height: 1.7;
}
.producer-artists strong {
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Voice cards */
.voice-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 2rem;
  position: relative;
}
.voice-card::before {
  content: '"';
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--color-primary);
  opacity: 0.2;
  position: absolute;
  top: 0.5rem;
  left: 1.5rem;
  line-height: 1;
}
.voice-quote { font-size: 0.95rem; line-height: 2; color: var(--color-text-muted); margin-bottom: 1.5rem; font-style: italic; }
.voice-author { font-family: var(--font-heading); font-size: 0.85rem; font-weight: 600; color: var(--color-text); }
.voice-meta { font-size: 0.75rem; color: var(--color-text-dim); }

/* Flow steps */
.flow-step {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all 0.4s var(--ease-out-expo);
}
.flow-step:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.step-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 1rem;
}
.step-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.flow-step p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.7; }

/* About features */
.about-feature {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.25rem;
  transition: all 0.3s ease;
}
.about-feature:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.about-feature .feature-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.about-feature h4 { font-family: var(--font-heading); font-size: 0.85rem; font-weight: 600; margin-bottom: 0.25rem; }
.about-feature p { font-size: 0.75rem; color: var(--color-text-dim); line-height: 1.6; margin: 0; }

/* Collaboration */
.collab-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s var(--ease-out-expo);
}
.collab-card:hover { transform: translateY(-4px); border-color: var(--color-primary); box-shadow: 0 20px 50px rgba(0,0,0,0.3); }
.collab-card-body { padding: 1.5rem; }
.collab-card-img {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-bg), var(--color-bg-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border-bottom: 1px solid var(--color-border);
}
.collab-card h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.collab-card p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.7; }

/* Event card */
.event-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s var(--ease-out-expo);
}
.event-card:hover { transform: translateY(-4px); border-color: var(--color-primary); }
.event-card-img {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, rgba(107,76,224,0.1), rgba(201,168,76,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.event-card-body { padding: 1.5rem; }
.event-card h3 { font-size: 0.95rem; margin-bottom: 0.5rem; }
.event-card p { font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.7; }
.event-date { font-family: var(--font-heading); font-size: 0.75rem; color: var(--color-primary); margin-bottom: 0.5rem; }

/* Column/Article */
.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s var(--ease-out-expo);
}
.article-card:hover { transform: translateY(-4px); border-color: var(--color-primary); }
.article-card-img {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, rgba(201,168,76,0.08), rgba(107,76,224,0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}
.article-card-body { padding: 1.5rem; }
.article-card h3 { font-size: 0.95rem; margin-bottom: 0.5rem; line-height: 1.5; }
.article-card p { font-size: 0.8rem; color: var(--color-text-muted); line-height: 1.7; }
.article-date { font-family: var(--font-heading); font-size: 0.7rem; color: var(--color-text-dim); margin-bottom: 0.5rem; }

/* Form */
.form-group { margin-bottom: 1.5rem; }
.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}
.form-group .required {
  color: var(--color-primary);
  font-size: 0.75rem;
  margin-left: 0.25rem;
}
.form-input {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: all 0.3s ease;
  outline: none;
}
.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}
textarea.form-input { min-height: 150px; resize: vertical; }
select.form-input { cursor: pointer; appearance: none; }

/* Media badges */
.media-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  transition: all 0.3s ease;
}
.media-badge:hover { border-color: var(--color-primary); }
.media-badge-icon { font-size: 2rem; }
.media-badge-text h4 { font-family: var(--font-heading); font-size: 0.85rem; font-weight: 600; }
.media-badge-text p { font-size: 0.75rem; color: var(--color-text-dim); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  nav ul { display: none; }
  .mobile-toggle { display: flex; }
  nav ul.open {
    display: flex !important;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.98);
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-auto { grid-template-columns: 1fr; }

  .page-hero { padding: 8rem 1.5rem 3rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }

  .news-item { flex-direction: column; gap: 0.5rem; }
}