/*
 * RIVINYX - Artist Site CSS
 * Theme: Cyberpunk / Dark / Cyan
 * Version: 2.0.0
 */

/* ==========================================================================
   CSS Variables
   ========================================================================== */

:root {
  --cyan:        #00e5ff;
  --cyan-dim:    #00b8cc;
  --cyan-glow:   rgba(0, 229, 255, 0.3);
  --pink:        #ff2d78;
  --pink-dim:    #cc2260;
  --pink-glow:   rgba(255, 45, 120, 0.3);
  --bg:          #07070f;
  --bg-2:        #0d0d1a;
  --bg-3:        #111122;
  --bg-card:     #0f0f1e;
  --border:      rgba(0, 229, 255, 0.18);
  --border-dim:  rgba(0, 229, 255, 0.08);
  --text:        #e0e8f0;
  --text-dim:    #8090a8;
  --text-muted:  #4a5568;
  --header-h:    70px;
  --max-w:       1100px;
  --radius:      4px;
  --radius-lg:   8px;
  --font-tech:   'Orbitron', 'Rajdhani', monospace;
  --font-body:   'Rajdhani', 'Noto Sans JP', sans-serif;
  --font-jp:     'Noto Sans JP', sans-serif;

  /* RIVI Studio freq colors */
  --freq-low:    #ff3d3d;
  --freq-mid:    #00e5ff;
  --freq-high:   #ffe100;
}

/* ==========================================================================
   Reset / Base
   ========================================================================== */

.rivinyx-front *,
.rivinyx-front *::before,
.rivinyx-front *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.rivinyx-front {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Cocoon override */
body.rivinyx-front #container,
body.rivinyx-front #main,
body.rivinyx-front .site-header,
body.rivinyx-front .navi,
body.rivinyx-front .footer {
  display: none !important;
}

body.rivinyx-front a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.2s;
}

body.rivinyx-front a:hover {
  color: var(--cyan-dim);
}

/* ==========================================================================
   Header
   ========================================================================== */

.rivi-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(7, 7, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.rivi-header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rivi-logo {
  font-family: var(--font-tech);
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--cyan) !important;
  letter-spacing: 0.1em;
  text-shadow: 0 0 16px var(--cyan-glow);
}

.logo-bracket {
  color: var(--pink);
  opacity: 0.8;
}

/* Nav */
.rivi-nav__list {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.rivi-nav__list a {
  font-family: var(--font-tech);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-dim) !important;
  transition: color 0.2s, text-shadow 0.2s;
  text-transform: uppercase;
}

.rivi-nav__list a:hover {
  color: var(--cyan) !important;
  text-shadow: 0 0 12px var(--cyan-glow);
}

.nav-num {
  color: var(--cyan);
  font-size: 0.65rem;
  margin-right: 4px;
}

/* Mobile toggle */
.rivi-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.rivi-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--cyan);
  transition: all 0.3s;
}

@media (max-width: 768px) {
  .rivi-nav-toggle {
    display: flex;
  }

  .rivi-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(7, 7, 15, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 24px;
  }

  .rivi-nav.is-open {
    display: block;
  }

  .rivi-nav__list {
    flex-direction: column;
    gap: 1rem;
  }

  .rivi-nav__list a {
    font-size: 0.9rem;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-tech);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all 0.25s;
  cursor: pointer;
}

.btn--primary {
  background: var(--cyan);
  color: var(--bg) !important;
  border: 1px solid var(--cyan);
  box-shadow: 0 0 20px var(--cyan-glow);
}

.btn--primary:hover {
  background: transparent;
  color: var(--cyan) !important;
  box-shadow: 0 0 30px var(--cyan-glow);
}

.btn--outline {
  background: transparent;
  color: var(--cyan) !important;
  border: 1px solid var(--border);
}

.btn--outline:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 20px var(--cyan-glow);
}

.btn--large {
  padding: 16px 36px;
  font-size: 0.9rem;
}

.btn-arrow {
  transition: transform 0.2s;
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.rivi-hero {
  position: relative;
  min-height: 100vh;
  padding-top: var(--header-h);
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Grid background */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

/* Scanline effect */
.hero-scanline {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.15) 2px,
    rgba(0,0,0,0.15) 4px
  );
  pointer-events: none;
  opacity: 0.3;
}

/* Glow orbs */
.rivi-hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,229,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.rivi-hero::after {
  content: '';
  position: absolute;
  bottom: 10%;
  right: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,45,120,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--pink);
  margin-bottom: 16px;
}

.hero-name {
  font-family: var(--font-tech);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}

.hero-name__rivi {
  color: var(--text);
  display: block;
}

.hero-name__nyx {
  color: var(--cyan);
  text-shadow: 0 0 30px var(--cyan-glow), 0 0 60px rgba(0,229,255,0.2);
  display: block;
}

.hero-sub {
  font-family: var(--font-jp);
  font-size: 1rem;
  color: var(--text-dim);
  margin-bottom: 40px;
  max-width: 400px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Waveform */
.waveform-container {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow: hidden;
}

.waveform-container::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,229,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

#heroWaveform {
  width: 100%;
  height: auto;
  display: block;
}

.waveform-label {
  font-family: var(--font-tech);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  margin-top: 12px;
  text-align: right;
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-tech);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

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

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }
}

/* ==========================================================================
   Sections (共通)
   ========================================================================== */

.rivi-section {
  padding: 100px 0;
  position: relative;
}

.rivi-section--alt {
  background: var(--bg-2);
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 60px;
}

.section-num {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  color: var(--pink);
  letter-spacing: 0.1em;
  opacity: 0.8;
}

.section-title {
  font-family: var(--font-tech);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--text);
}

.section-title .accent {
  color: var(--cyan);
  text-shadow: 0 0 20px var(--cyan-glow);
}

.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
}

/* ==========================================================================
   About
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-lead {
  font-family: var(--font-jp);
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 16px;
  font-weight: 700;
}

.about-text p {
  font-family: var(--font-jp);
  color: var(--text-dim);
  margin-bottom: 28px;
  line-height: 1.9;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.04);
}

.about-stat {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.stat-item {
  text-align: center;
  padding: 24px;
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.stat-num {
  font-family: var(--font-tech);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--cyan);
  text-shadow: 0 0 20px var(--cyan-glow);
}

.stat-label {
  font-family: var(--font-tech);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  margin-top: 6px;
}

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

  .about-stat {
    flex-direction: row;
  }

  .stat-item {
    flex: 1;
  }
}

/* ==========================================================================
   Music Grid
   ========================================================================== */

.music-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.music-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.music-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,229,255,0.12);
}

.music-card__link {
  display: block;
  color: var(--text) !important;
}

.music-card__thumb {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
}

.music-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.music-card:hover .music-card__thumb img {
  transform: scale(1.06);
}

.music-card__placeholder {
  width: 100%;
  height: 100%;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-icon {
  font-size: 3rem;
  color: var(--text-muted);
}

.music-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,229,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.music-card:hover .music-card__overlay {
  opacity: 1;
}

.play-btn {
  font-size: 2rem;
  color: var(--cyan);
  text-shadow: 0 0 20px var(--cyan-glow);
}

.music-card__body {
  padding: 16px;
}

.music-card__genre {
  font-family: var(--font-tech);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--pink);
  text-transform: uppercase;
}

.music-card__title {
  font-family: var(--font-tech);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin: 6px 0 4px;
  letter-spacing: 0.05em;
}

.music-card__date {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-tech);
}

.no-content {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 0;
  color: var(--text-muted);
}

.no-content__icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.3;
}

.section-more {
  text-align: center;
}

@media (max-width: 900px) {
  .music-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .music-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   RIVI Studio Promo
   ========================================================================== */

.rivi-studio-promo {
  background: var(--bg-3);
  overflow: hidden;
}

.studio-bg-effect {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(0,229,255,0.06) 0%, transparent 70%),
    linear-gradient(rgba(0,229,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.02) 1px, transparent 1px);
  background-size: auto, 40px 40px, 40px 40px;
  pointer-events: none;
}

.studio-promo-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.studio-lead {
  font-family: var(--font-jp);
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 24px;
  font-weight: 700;
}

.studio-features {
  list-style: none;
  margin-bottom: 36px;
}

.studio-features li {
  font-family: var(--font-jp);
  color: var(--text-dim);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-dim);
  display: flex;
  align-items: center;
  gap: 12px;
}

.feat-icon {
  color: var(--cyan);
  font-size: 0.8rem;
}

/* Studio screen mockup */
.studio-screen {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0,229,255,0.08);
}

.screen-bar {
  background: var(--bg-2);
  padding: 10px 16px;
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border-dim);
}

.screen-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.screen-bar span:first-child { background: #ff5f57; }
.screen-bar span:nth-child(2) { background: #febc2e; }
.screen-bar span:last-child { background: #28c840; }

.screen-content {
  padding: 24px 20px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 160px;
}

.freq-bar {
  flex: 1;
  border-radius: 2px 2px 0 0;
  transition: height 0.15s ease;
}

.freq-low  { background: linear-gradient(to top, var(--freq-low), rgba(255,61,61,0.3)); }
.freq-mid  { background: linear-gradient(to top, var(--freq-mid), rgba(0,229,255,0.3)); }
.freq-high { background: linear-gradient(to top, var(--freq-high), rgba(255,225,0,0.3)); }

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

/* ==========================================================================
   SNS / Connect
   ========================================================================== */

.sns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.sns-card {
  display: block;
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s;
  color: var(--text) !important;
}

.sns-card:hover {
  transform: translateY(-4px);
}

.sns-card--x:hover     { border-color: #1da1f2; box-shadow: 0 8px 30px rgba(29,161,242,0.2); }
.sns-card--yt:hover    { border-color: #ff0000; box-shadow: 0 8px 30px rgba(255,0,0,0.2); }
.sns-card--tunee:hover { border-color: var(--pink); box-shadow: 0 8px 30px var(--pink-glow); }

.sns-card__icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  line-height: 1;
}

.sns-card__label {
  font-family: var(--font-tech);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.sns-card__handle {
  font-family: var(--font-tech);
  font-size: 0.85rem;
  color: var(--cyan);
}

@media (max-width: 560px) {
  .sns-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.rivi-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border-dim);
  padding: 40px 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-logo {
  font-family: var(--font-tech);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-shadow: 0 0 12px var(--cyan-glow);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-tech);
  letter-spacing: 0.1em;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  font-family: var(--font-tech);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-muted) !important;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: var(--cyan) !important;
}

/* ==========================================================================
   Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--cyan-dim);
  border-radius: 2px;
}

/* ==========================================================================
   Selection
   ========================================================================== */

::selection {
  background: rgba(0, 229, 255, 0.25);
  color: var(--text);
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.rivi-section {
  animation: fadeInUp 0.6s ease both;
}