:root {
  --bg: #070709;
  --bg-2: #121218;
  --ink: #f4f0e8;
  --muted: #9a958a;
  --accent: #ff6a1a;
  --accent-2: #ffd166;
  --good: #3ddc97;
  --bad: #ff4d6d;
  --line: rgba(244, 240, 232, 0.12);
  --font-display: "Anton", Impact, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --radius: 14px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; cursor: pointer; }
.hidden { display: none !important; }

#app { min-height: 100vh; }
.view { display: none; min-height: 100vh; }
.view.active { display: block; }

/* —— Hero —— */
.view-home { padding: 0; }
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 30%, rgba(255, 106, 26, 0.35), transparent 55%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(255, 209, 102, 0.12), transparent 50%),
    linear-gradient(160deg, #0a0a0c 0%, #1a1210 45%, #070709 100%);
  animation: glow 8s ease-in-out infinite alternate;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, transparent, transparent 48px, rgba(255,255,255,0.015) 49px),
    repeating-linear-gradient(0deg, transparent, transparent 48px, rgba(255,255,255,0.015) 49px);
  opacity: 0.6;
}
@keyframes glow {
  from { filter: saturate(1) brightness(1); }
  to { filter: saturate(1.15) brightness(1.08); }
}

.topbar {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1.5rem;
}
.logo {
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  font-size: 1.15rem;
}
.topnav { display: flex; gap: 1rem; }
.linkish {
  background: none;
  border: 0;
  color: var(--muted);
  padding: 0.35rem 0;
}
.linkish:hover { color: var(--ink); }

.hero-copy {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem 1.5rem 3.5rem;
  max-width: 720px;
  animation: rise 0.9s ease-out both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 18vw, 9rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  text-shadow: 0 8px 40px rgba(255, 106, 26, 0.35);
}
.tagline {
  margin: 1rem 0 0.4rem;
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 600;
}
.lede {
  margin: 0 0 1.6rem;
  color: var(--muted);
  max-width: 36ch;
  line-height: 1.5;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.85rem 1.4rem;
  font-weight: 600;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--accent);
  color: #120800;
  box-shadow: 0 10px 30px rgba(255, 106, 26, 0.35);
}
.btn-primary:hover { background: #ff7d38; }
.btn-ghost {
  background: rgba(255,255,255,0.06);
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-wide { width: 100%; margin-top: 0.5rem; }

.home-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
}
.inst-card {
  background: var(--bg-2);
  border: 0;
  color: inherit;
  text-align: left;
  padding: 1.4rem 1.5rem;
  transition: background 0.2s ease;
}
.inst-card:hover { background: #1a1a22; }
.inst-label {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.04em;
}
.inst-hint { color: var(--muted); font-size: 0.9rem; }

/* —— Shared —— */
.subhead {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(7,7,9,0.92);
  backdrop-filter: blur(10px);
  z-index: 5;
}
.subhead h2 { margin: 0; font-size: 1.15rem; font-weight: 700; }
.back {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 1.1rem;
}

.pick-grid, #view-songs, #view-progress, #view-tuner {
  padding: 1.25rem;
  max-width: 880px;
  margin: 0 auto;
}
.pick-block { margin-bottom: 1.5rem; }
.pick-block h3 {
  margin: 0 0 0.65rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.seg { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.seg-btn, .chip {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.55rem 1rem;
}
.seg-btn.active, .chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #120800;
  font-weight: 700;
}
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.85rem; }
.legal-note {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
  margin: 0 0 1rem;
}

.song-list { display: grid; gap: 0.65rem; }
.song-list.compact { gap: 0.5rem; }
.song-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #15151c, #101016);
  border: 1px solid var(--line);
  color: inherit;
  text-align: left;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.song-card:hover {
  border-color: rgba(255, 106, 26, 0.45);
  transform: translateY(-1px);
}
.song-card strong { display: block; font-size: 1.05rem; }
.song-card .meta { color: var(--muted); font-size: 0.85rem; }
.song-card .badge {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
}

/* —— Practice —— */
.view-practice { display: none; flex-direction: column; min-height: 100vh; }
.view-practice.active { display: flex; }
.practice-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
}
.practice-meta strong { display: block; }
.practice-meta span { color: var(--muted); font-size: 0.85rem; }
.practice-stats {
  display: flex;
  gap: 1rem;
  align-items: center;
}
.practice-score {
  text-align: right;
}
.practice-score #hit-pct,
.practice-score #combo-val {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--accent-2);
  line-height: 1;
}
.score-label { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }

.mode-row {
  display: flex;
  gap: 0.4rem;
  padding: 0.65rem 1rem 0;
  flex-wrap: wrap;
}
.mode-btn {
  flex: 1;
  min-width: 6.5rem;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.55rem 0.75rem;
  font-weight: 600;
  font-size: 0.85rem;
}
.mode-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #120800;
}
.tog {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
  user-select: none;
}
.tog input { accent-color: var(--accent); }
.stars {
  font-size: 1.6rem;
  color: var(--accent-2);
  letter-spacing: 0.15em;
  margin: 0 0 1rem;
}

.stage-wrap {
  position: relative;
  flex: 1;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255,106,26,0.12), transparent 55%),
    #0c0c10;
  display: flex;
  flex-direction: column;
}
#stage {
  width: 100%;
  height: min(58vh, 520px);
  display: block;
}
.live-meter {
  padding: 0.85rem 1.25rem 1.1rem;
  display: grid;
  gap: 0.45rem;
}
.meter-pitch {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.04em;
}
.cents { font-family: var(--font-body); font-size: 1rem; color: var(--muted); }
.meter-bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}
.meter-bar i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--bad), var(--accent-2), var(--good));
  transition: width 0.08s linear;
}
.meter-status { color: var(--muted); font-size: 0.9rem; }

.transport {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  padding: 1rem 1.15rem 1.4rem;
  border-top: 1px solid var(--line);
  background: var(--bg-2);
}
.bpm-ctrl {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  margin-left: auto;
}
.bpm-ctrl input { width: 110px; accent-color: var(--accent); }

.result-panel {
  position: fixed;
  inset: auto 1rem 5.5rem;
  max-width: 420px;
  margin: 0 auto;
  left: 1rem;
  right: 1rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  background: rgba(18,18,24,0.96);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  z-index: 20;
}
.result-panel h3 { margin: 0 0 0.4rem; font-family: var(--font-display); letter-spacing: 0.04em; }
.result-panel p { color: var(--muted); margin: 0 0 1rem; }

/* —— Tuner —— */
.tuner-panel {
  text-align: center;
  padding: 2rem 0;
}
.tuner-note {
  font-family: var(--font-display);
  font-size: 5rem;
  line-height: 1;
  letter-spacing: 0.04em;
}
.tuner-needle-wrap {
  position: relative;
  height: 12px;
  margin: 1.5rem auto;
  max-width: 320px;
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  overflow: visible;
}
.tuner-needle {
  position: absolute;
  top: -8px;
  left: 50%;
  width: 4px;
  height: 28px;
  margin-left: -2px;
  border-radius: 2px;
  background: var(--accent);
  transition: left 0.08s linear, background 0.15s ease;
}
.tuner-cents { color: var(--muted); margin-bottom: 1.5rem; }
.string-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.5rem;
}
.string-row button {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-weight: 700;
}
.string-row button.active {
  border-color: var(--accent);
  background: rgba(255,106,26,0.15);
  color: var(--accent-2);
}

.stats-grid {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.stat-card {
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-2);
}
.stat-card strong { display: block; font-size: 1.4rem; }
.stat-card span { color: var(--muted); font-size: 0.85rem; }

@media (max-width: 640px) {
  .bpm-ctrl { margin-left: 0; width: 100%; }
  .home-strip { grid-template-columns: 1fr; }
}