/* ============================================
   SORA VISION — Styles
   ============================================ */

:root {
  --white: #ffffff;
  --off-white: #f7fbfd;
  --sky-50: #eef8fd;
  --sky-100: #d4f0fa;
  --sky-200: #b8e4f5;
  --sky-300: #87ceeb;
  --sky-400: #5bb8d4;
  --sky-500: #3ea8c8;
  --sky-600: #2a9db5;
  --sky-700: #1a7a9a;
  --sky-800: #0f5a78;
  --dark: #0d1b24;
  --dark-2: #152535;
  --text: #1a2e3b;
  --text-muted: #6a8fa0;
  --border: rgba(90, 184, 212, 0.15);

  --font-serif: 'Cormorant Garamond', 'Hiragino Mincho ProN', 'Yu Mincho', 'Noto Serif JP', Georgia, serif;
  --font-sans: 'Inter', 'Hiragino Sans', 'Yu Gothic', sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --transition: 0.6s var(--ease-out);
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--text);
  overflow-x: hidden;
  cursor: none;
}

a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: none; border: none; background: none; font-family: inherit; }

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.section { padding: 120px 0; }

/* ============================================
   CUSTOM CURSOR
   ============================================ */
.cursor {
  position: fixed;
  width: 8px; height: 8px;
  background: var(--sky-500);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: transform 0.1s, background 0.3s;
  mix-blend-mode: multiply;
}

.cursor-follower {
  position: fixed;
  width: 36px; height: 36px;
  border: 1.5px solid var(--sky-400);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: transform 0.12s var(--ease-out), width 0.3s, height 0.3s, border-color 0.3s;
}

body:has(a:hover) .cursor-follower,
body:has(button:hover) .cursor-follower {
  width: 56px; height: 56px;
  border-color: var(--sky-500);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 28px 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding 0.4s var(--ease-out), background 0.4s, box-shadow 0.4s;
}

.nav.scrolled {
  padding: 16px 5%;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.logo-text {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--sky-700);
  transition: color 0.4s;
}

.nav:not(.scrolled) .logo-text {
  color: rgba(255,255,255,0.95);
}

.nav:not(.scrolled) .nav-link {
  color: rgba(255,255,255,0.75);
}

.nav:not(.scrolled) .nav-link:hover {
  color: #fff;
}

.nav:not(.scrolled) .nav-link::after {
  background: rgba(255,255,255,0.8);
}

.nav:not(.scrolled) .nav-toggle span {
  background: rgba(255,255,255,0.9);
}

.nav-links {
  display: flex;
  gap: 48px;
  list-style: none;
}

.nav-link {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color 0.3s;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--sky-500);
  transition: width 0.4s var(--ease-out);
}

.nav-link:hover { color: var(--sky-600); }
.nav-link:hover::after { width: 100%; }

.nav-toggle { display: none; flex-direction: column; gap: 6px; cursor: none; }
.nav-toggle span {
  display: block; width: 24px; height: 1.5px;
  background: var(--sky-700);
  transition: transform 0.3s, opacity 0.3s;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(180deg,
    #c9eaf8 0%,
    #a8d8f0 18%,
    #87ceeb 42%,
    #70c0e8 65%,
    #b8dff5 85%,
    #e8f7fd 100%
  );
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-left: 8%;
  padding-top: 80px;
}

.hero-sub {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  margin-bottom: 20px;
  text-shadow: 0 1px 8px rgba(30,100,150,0.25);
}

.hero-title {
  display: flex;
  flex-direction: column;
  /* Cormorant Garamond の "Sora Vision" 文字のみサブセットを<head>で先行ロード済み(CLS防止) */
  font-family: var(--font-serif);
  font-size: clamp(5rem, 12vw, 11rem);
  font-weight: 300;
  line-height: 0.9;
  color: #fff;
  text-shadow: 0 2px 24px rgba(20,80,130,0.2);
  margin-bottom: 32px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.hero-title .italic {
  font-style: italic;
  color: rgba(255,255,255,0.75);
  padding-left: clamp(2rem, 5vw, 5rem);
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  color: rgba(255,255,255,0.82);
  text-shadow: 0 1px 10px rgba(20,80,130,0.2);
  margin-bottom: 48px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 36px;
  border: 1.5px solid rgba(255,255,255,0.7);
  color: #fff;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: background 0.4s, color 0.4s, border-color 0.4s, transform 0.3s;
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.2);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}

.hero-cta:hover { color: #fff; border-color: rgba(255,255,255,0.95); }
.hero-cta:hover::before { transform: scaleX(1); }
.hero-cta span, .hero-cta svg { position: relative; z-index: 1; }
.hero-cta svg { width: 18px; height: 18px; transition: transform 0.3s; }
.hero-cta:hover svg { transform: translateX(4px); }

.hero-scroll {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.7);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  z-index: 2;
}

.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.7), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal-up, .reveal-left {
  opacity: 0;
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  transition-delay: var(--delay, 0s);
}

.reveal-up { transform: translateY(40px); }
.reveal-left { transform: translateX(-40px); }

.reveal-up.visible, .reveal-left.visible {
  opacity: 1;
  transform: none;
}

/* ============================================
   SECTION LABELS & TITLES
   ============================================ */
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--sky-500);
  margin-bottom: 16px;
  display: block;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 300;
  line-height: 1.15;
  color: var(--sky-800);
  margin-bottom: 48px;
}

.section-title em {
  font-style: italic;
  color: var(--sky-500);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

/* ============================================
   ABOUT
   ============================================ */
.about {
  background: var(--white);
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: center;
}

.about-image-wrap {
  position: relative;
}

.about-image-frame {
  position: relative;
  padding-top: 130%;
}

.about-image-inner {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: 2px;
}

.about-img-placeholder {
  width: 100%; height: 100%;
  transition: transform 0.8s var(--ease-out);
}

.about-img-placeholder svg { width: 100%; height: 100%; }
.about-img-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 75% 5%;
  display: block;
}

.about-image-wrap:hover .about-img-placeholder { transform: scale(1.04); }

.about-float-card {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 24px 28px;
  box-shadow: 0 20px 60px rgba(90,184,212,0.12);
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 2;
}

.float-num {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 400;
  color: var(--sky-600);
  line-height: 1.2;
  letter-spacing: 0.05em;
}

.about-desc {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ============================================
   MUSIC PLAYER
   ============================================ */
.music {
  position: relative;
  background: var(--dark);
  overflow: hidden;
}

.music .section-label { color: var(--sky-400); }
.music .section-title { color: var(--white); margin-bottom: 56px; }

.music-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(62,168,200,0.12) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(42,157,181,0.08) 0%, transparent 50%);
}

.player-wrap {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: start;
}

.track-list { display: flex; flex-direction: column; gap: 0; }

.track {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.3s;
  cursor: none;
}

.track:hover { background: rgba(255,255,255,0.03); }
.track.active { background: rgba(62,168,200,0.1); }

.track-num {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.2);
  width: 24px;
  flex-shrink: 0;
}

.track.active .track-num { color: var(--sky-400); }

.track-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.track-name {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  transition: color 0.3s;
}

.track.active .track-name { color: var(--white); }
.track:hover .track-name { color: var(--white); }

.track-album {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.3);
}

.track-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 16px;
  width: 20px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.3s;
}

.track.active.playing .track-bars { opacity: 1; }

.track-bars span {
  display: block;
  width: 3px;
  background: var(--sky-400);
  border-radius: 2px;
  animation: bar 0.8s ease-in-out infinite alternate;
}

.track-bars span:nth-child(1) { height: 8px; animation-delay: 0s; }
.track-bars span:nth-child(2) { height: 14px; animation-delay: 0.15s; }
.track-bars span:nth-child(3) { height: 10px; animation-delay: 0.3s; }
.track-bars span:nth-child(4) { height: 6px; animation-delay: 0.45s; }

@keyframes bar {
  from { transform: scaleY(0.3); }
  to { transform: scaleY(1); }
}

.track-dur {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
  flex-shrink: 0;
}

/* Player Controls */
.player-controls {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 36px;
  border-radius: 2px;
}

.now-playing {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
}

.now-playing-art {
  width: 72px; height: 72px;
  flex-shrink: 0;
}

.vinyl-disc {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    #0d1b24 0%, #1a3a4a 10%, #0d1b24 20%, #152535 30%,
    #0d1b24 40%, #1a3a4a 50%, #0d1b24 60%, #152535 70%,
    #0d1b24 80%, #1a3a4a 90%, #0d1b24 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(62,168,200,0.2);
  transition: animation 0.3s;
}

.vinyl-disc.spinning {
  animation: spin 4s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.vinyl-inner {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--sky-500);
  box-shadow: 0 0 12px var(--sky-400);
}

.np-label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sky-400);
  margin-bottom: 6px;
}

.np-title {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--white);
  margin-bottom: 4px;
}

.np-artist {
  display: block;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
}

.progress-wrap { margin-bottom: 28px; }

.progress-bar {
  height: 2px;
  background: rgba(255,255,255,0.08);
  margin-bottom: 8px;
  cursor: none;
  position: relative;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(to right, var(--sky-400), var(--sky-300));
  width: 0%;
  transition: width 0.3s linear;
}

.progress-times {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  color: rgba(255,255,255,0.25);
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.ctrl-btn {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  transition: color 0.3s;
}

.ctrl-btn svg { width: 18px; height: 18px; }
.ctrl-btn:hover { color: var(--white); }

.play-btn {
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 1.5px solid var(--sky-400) !important;
  color: var(--sky-400);
  position: relative;
  overflow: hidden;
  transition: color 0.3s, background 0.3s;
}

.play-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--sky-400);
  border-radius: 50%;
  transform: scale(0);
  transition: transform 0.4s var(--ease-out);
}

.play-btn:hover { color: var(--white); }
.play-btn:hover::before { transform: scale(1); }
.play-btn svg { position: relative; z-index: 1; width: 22px; height: 22px; }

.icon-pause { display: none; }
.playing .icon-play { display: none; }
.playing .icon-pause { display: block; }

/* ============================================
   LYRICS FEATURE
   ============================================ */
.live {
  background: var(--white);
  overflow: hidden;
}

.lyrics-layout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 16px;
  border: 1px solid var(--border);
}

.lyrics-block {
  padding: 48px 40px;
  border-right: 1px solid var(--border);
}

.lyrics-block:last-of-type { border-right: none; }

.lyric-line {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 2;
  color: var(--text-muted);
  transition: color 0.3s;
}

.lyric-line.highlight {
  color: var(--sky-600);
  font-weight: 400;
}

.lyrics-feature {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
}

.lyrics-video {
  position: relative;
  flex: 0 0 50%;
  max-width: 560px;
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--border);
  overflow: hidden;
}

.lyrics-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

@media (max-width: 768px) {
  .lyrics-feature { gap: 24px; }
  .lyrics-video {
    flex: 1 1 100%;
    max-width: none;
  }
}

.lyrics-cta {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 24px;
  min-width: 0;
}

.apple-music-embed {
  width: 100%;
  max-width: 660px;
  height: 150px;
  border: 0;
  background: transparent;
  overflow: hidden;
  border-radius: 8px;
  display: block;
}

.live-btn {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sky-600);
  border: 1px solid var(--sky-300);
  padding: 10px 24px;
  transition: background 0.3s, color 0.3s;
}

.live-btn:hover {
  background: var(--sky-500);
  color: var(--white);
  border-color: var(--sky-500);
}

.lyrics-watch-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 22px 32px;
  background: transparent;
  border: 1px solid var(--sky-300);
  color: var(--sky-700);
  text-decoration: none;
  overflow: hidden;
  isolation: isolate;
  transition: color 0.45s ease, border-color 0.45s ease;
}

.lyrics-watch-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--sky-700);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.55s cubic-bezier(0.16, 0.84, 0.36, 1);
  z-index: -1;
}

.lyrics-watch-btn:hover,
.lyrics-watch-btn:focus-visible {
  color: #fff;
  border-color: var(--sky-700);
}

.lyrics-watch-btn:hover::before,
.lyrics-watch-btn:focus-visible::before {
  transform: scaleX(1);
}

.lyrics-watch-btn .btn-eyebrow {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--sky-400);
  padding-right: 20px;
  border-right: 1px solid var(--border);
  transition: color 0.4s ease, border-color 0.4s ease;
}

.lyrics-watch-btn:hover .btn-eyebrow,
.lyrics-watch-btn:focus-visible .btn-eyebrow {
  color: rgba(255, 255, 255, 0.7);
  border-right-color: rgba(255, 255, 255, 0.3);
}

.lyrics-watch-btn .btn-label {
  font-family: 'Noto Serif JP', serif;
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.lyrics-watch-btn .btn-arrow {
  width: 32px;
  height: 12px;
  margin-left: auto;
  transition: transform 0.45s cubic-bezier(0.16, 0.84, 0.36, 1);
  flex-shrink: 0;
}

.lyrics-watch-btn:hover .btn-arrow,
.lyrics-watch-btn:focus-visible .btn-arrow {
  transform: translateX(6px);
}

@media (max-width: 480px) {
  .lyrics-watch-btn {
    padding: 18px 22px;
    gap: 14px;
  }
  .lyrics-watch-btn .btn-eyebrow {
    padding-right: 14px;
    font-size: 0.65rem;
    letter-spacing: 0.24em;
  }
  .lyrics-watch-btn .btn-label { font-size: 0.92rem; }
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
  position: relative;
  background: var(--off-white);
  overflow: hidden;
}

.contact-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(184,228,245,0.3) 0%, transparent 60%);
}

.contact-inner {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.contact-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 56px;
  margin-top: -24px;
}

.contact-form { text-align: left; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  position: relative;
  margin-bottom: 28px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 18px 0 14px;
  border: none;
  border-bottom: 1.5px solid var(--border);
  background: transparent;
  font-family: var(--font-sans);
  /* 16px以上でiOSの自動ズームを抑止 */
  font-size: 16px;
  color: var(--text);
  outline: none;
  transition: border-color 0.3s;
  resize: none;
  cursor: none;
}

.form-group label {
  position: absolute;
  top: 18px; left: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  transition: top 0.3s, font-size 0.3s, color 0.3s;
  pointer-events: none;
}

.form-group input:focus,
.form-group textarea:focus { border-color: var(--sky-400); }

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
  top: 0;
  font-size: 0.68rem;
  color: var(--sky-500);
  letter-spacing: 0.1em;
}

.submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 48px;
  background: var(--sky-700);
  color: var(--white);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: background 0.3s, transform 0.3s;
  position: relative;
  overflow: hidden;
  margin: 12px auto 0;
  display: flex;
}

.submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--sky-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}

.submit-btn:hover::before { transform: scaleX(1); }
.submit-btn span, .submit-btn svg { position: relative; z-index: 1; }
.submit-btn svg { width: 16px; height: 16px; }

.social-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 64px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: var(--sky-600);
  border: 1px solid rgba(90, 184, 212, 0.25);
  background: transparent;
  transition: color 0.3s ease, border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.social-link:hover,
.social-link:focus-visible {
  color: var(--sky-400);
  border-color: var(--sky-400);
  background: rgba(91, 184, 212, 0.08);
  transform: translateY(-2px);
}

.social-icon {
  width: 20px;
  height: 20px;
  display: block;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--dark);
  padding: 56px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--sky-400);
  margin-bottom: 8px;
}

.footer-copy {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.1em;
}

.footer-made {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.15);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-image-frame { padding-top: 70%; }
  .player-wrap { grid-template-columns: 1fr; }
  .player-controls { order: -1; }
  .lyrics-layout { grid-template-columns: 1fr; }
  .lyrics-block { border-right: none; border-bottom: 1px solid var(--border); }
}

@media (max-width: 640px) {
  .lyrics-layout { grid-template-columns: 1fr; }
  .lyrics-block { padding: 32px 24px; }
  .nav-links {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: 260px;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    gap: 32px;
    transform: translateX(100%);
    transition: transform 0.5s var(--ease-out);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: flex; z-index: 2; }
  .nav-link { font-size: 1rem; }
  .form-row { grid-template-columns: 1fr; }
  .hero-content { padding-left: 5%; }
  .section { padding: 80px 0; }
  .live-item { grid-template-columns: 60px 1fr; }
  .live-status { display: none; }
  .about-float-card { right: 0; }
}

/* ==========================================================
   アクセシビリティ / フォーム追加スタイル
   ========================================================== */

/* Skip link(キーボード操作時のみ表示) */
.skip-link {
  position: absolute;
  top: -48px;
  left: 0;
  background: var(--sky-700);
  color: #fff;
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  z-index: 10000;
  transition: top 0.2s ease;
  text-decoration: none;
}
.skip-link:focus {
  top: 0;
  outline: 2px solid var(--sky-100);
  outline-offset: -2px;
}

/* 視覚的非表示(SEO/スクリーンリーダー向け) */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* フォーカスリング(キーボードユーザー向け) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--sky-400);
  outline-offset: 3px;
}

/* ハニーポット(ボット対策) — 視覚・読み上げ両方から隠す */
.hp-field {
  position: absolute !important;
  left: -9999px;
  top: auto;
  width: 1px; height: 1px;
  overflow: hidden;
}

/* プライバシー同意チェックボックス */
.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 12px 0 20px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1.6;
}
.consent-row input[type="checkbox"] {
  width: 18px; height: 18px;
  margin-top: 3px;
  accent-color: var(--sky-500);
  flex-shrink: 0;
  cursor: pointer;
}
.consent-row a { color: var(--sky-700); text-decoration: underline; }
.consent-row a:hover { color: var(--sky-400); }

/* フォーム送信ステータス */
.form-status {
  margin-top: 16px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  min-height: 1.4em;
  text-align: center;
}
.form-status.is-success { color: var(--sky-700); }
.form-status.is-error   { color: #c04040; }
.form-status.is-loading { color: var(--text-muted); }

/* フッターナビ(プライバシー等のリンク) */
.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 12px 0 8px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  flex-wrap: wrap;
}
.footer-link {
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
  padding: 6px 4px;
}
.footer-link:hover,
.footer-link:focus-visible { color: #fff; }
.footer-sep { color: rgba(255,255,255,0.3); }

/* タップターゲット拡大(44×44px以上) */
@media (max-width: 768px) {
  .nav-link {
    padding: 14px 18px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .social-link {
    width: 44px;
    height: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .ctrl-btn {
    min-width: 44px;
    min-height: 44px;
  }
  .submit-btn {
    min-height: 48px;
  }
}