:root {
  --bg: #141019;
  --bg-2: #1b1520;
  --surface: #201a27;
  --surface-2: #271f30;
  --border: rgba(255, 255, 255, 0.09);
  --text: #f1ebe4;
  --muted: #a99db2;
  --ember: #ff7a2f;
  --ember-2: #ffb457;
  --chord: #ffab5e;
  --radius: 16px;
  --wrap: 680px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html, body { height: 100%; }
#app { min-height: 100%; }

body {
  background:
    radial-gradient(90% 60% at 82% -8%, rgba(255, 122, 47, 0.16), transparent 60%),
    radial-gradient(70% 50% at 8% 4%, rgba(120, 80, 200, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  line-height: 1.5;
  min-height: 100%;
}

a { color: inherit; }

/* ============ Buttons ============ */
.btn-primary, .btn-guest, .btn-ghost, .btn-toggle {
  font: inherit;
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-primary {
  width: 100%;
  padding: 0.85rem;
  font-weight: 600;
  color: #241205;
  background: linear-gradient(180deg, var(--ember-2), var(--ember));
  box-shadow: 0 8px 22px rgba(255, 122, 47, 0.28);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.6; transform: none; cursor: default; }
.btn-guest {
  width: 100%;
  padding: 0.8rem;
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border);
}
.btn-guest:hover { border-color: var(--ember); color: var(--ember-2); }
.btn-ghost {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  color: var(--muted);
  background: transparent;
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--ember); }
.btn-toggle {
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
  color: var(--muted);
  background: transparent;
  border-color: var(--border);
  margin: 1.3rem 0 0.4rem;
}
.btn-toggle:hover { color: var(--ember-2); border-color: var(--ember); }

/* ============ Flame ============ */
.flame {
  transform-origin: 50% 92%;
  animation: breathe 2.6s ease-in-out infinite;
}
.flame-outer { transform-origin: 50% 92%; transform-box: fill-box; animation: flkO 2.1s ease-in-out infinite; }
.flame-inner { transform-origin: 50% 88%; transform-box: fill-box; animation: flkI 1.5s ease-in-out infinite; }
@keyframes breathe { 0%,100% { transform: scaleY(1) scaleX(1) rotate(0); } 50% { transform: scaleY(1.035) scaleX(0.985) rotate(-0.5deg); } }
@keyframes flkO { 0%,100% { transform: scaleY(1) skewX(0); } 30% { transform: scaleY(1.05) skewX(1.4deg); } 65% { transform: scaleY(0.97) skewX(-1.4deg); } }
@keyframes flkI { 0%,100% { transform: scaleY(1) translateX(0); opacity: 0.96; } 35% { transform: scaleY(1.1) translateX(0.6px); opacity: 1; } 70% { transform: scaleY(0.92) translateX(-0.6px); opacity: 0.9; } }

.logo-flame { width: 26px; height: 35px; filter: drop-shadow(0 2px 10px rgba(255, 110, 30, 0.5)); }
.auth-flame { width: clamp(64px, 18vw, 82px); height: auto; filter: drop-shadow(0 6px 26px rgba(255, 100, 20, 0.45)); }

/* ============ Login ============ */
.auth {
  min-height: 100svh;
  min-height: 100vh;
  width: 100%;
  display: grid;
  place-items: center;
  padding: 2rem calc(1.25rem + env(safe-area-inset-right)) 2rem calc(1.25rem + env(safe-area-inset-left));
}
.auth-card {
  width: 100%;
  max-width: 400px;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 2rem 1.6rem 1.6rem;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
}
.auth-brand { text-align: center; margin-bottom: 1.5rem; }
.auth-brand h1 { font-size: 1.7rem; font-weight: 700; margin-top: 0.5rem; letter-spacing: -0.01em; }
.auth-tag { color: var(--muted); font-size: 0.92rem; margin-top: 0.3rem; }

.seg-toggle {
  display: flex;
  gap: 0.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.25rem;
  margin-bottom: 1.2rem;
}
.seg-toggle button {
  flex: 1;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.55rem;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg-toggle button.on { background: var(--surface-2); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,0.3); }

.fld { display: block; margin-bottom: 0.9rem; }
.fld span { display: block; font-size: 0.78rem; color: var(--muted); margin-bottom: 0.35rem; letter-spacing: 0.02em; }
.fld input {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 0.7rem 0.85rem;
}
.fld input:focus { outline: none; border-color: var(--ember); box-shadow: 0 0 0 3px rgba(255, 122, 47, 0.16); }

.auth-error {
  background: rgba(255, 90, 70, 0.12);
  border: 1px solid rgba(255, 90, 70, 0.35);
  color: #ff9d8f;
  font-size: 0.85rem;
  border-radius: 10px;
  padding: 0.55rem 0.75rem;
  margin-bottom: 0.9rem;
}
.auth-or { display: flex; align-items: center; gap: 0.8rem; color: var(--muted); font-size: 0.78rem; margin: 1.1rem 0; }
.auth-or::before, .auth-or::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.auth-fine { color: var(--muted); font-size: 0.72rem; line-height: 1.4; margin-top: 1.1rem; text-align: center; }

/* ============ Top bar ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem calc(1.1rem + env(safe-area-inset-right)) 0.7rem calc(1.1rem + env(safe-area-inset-left));
  background: rgba(20, 16, 25, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.logo { display: inline-flex; align-items: center; gap: 0.5rem; text-decoration: none; font-weight: 700; letter-spacing: -0.01em; }
.nav { display: flex; gap: 0.3rem; margin-left: auto; }
.nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
}
.nav a:hover { color: var(--text); }
.nav a.on { color: var(--text); background: var(--surface-2); }
.pill {
  display: inline-grid;
  place-items: center;
  min-width: 1.15rem;
  height: 1.15rem;
  padding: 0 0.3rem;
  font-size: 0.7rem;
  border-radius: 999px;
  background: var(--ember);
  color: #241205;
  font-weight: 700;
}
.user { display: flex; align-items: center; gap: 0.6rem; }
.uname { color: var(--muted); font-size: 0.88rem; max-width: 8rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============ Content ============ */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 1.6rem calc(1.25rem + env(safe-area-inset-right)) 4rem calc(1.25rem + env(safe-area-inset-left)); }
.page-title { font-size: 1.9rem; font-weight: 700; letter-spacing: -0.02em; }
.list-intro { color: var(--muted); margin: 0.35rem 0 1.5rem; }
.empty { color: var(--muted); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; text-align: center; }

/* Song list rows */
.song-list { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.row {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, transform 0.12s ease, background 0.15s ease;
}
.row:hover { border-color: rgba(255, 122, 47, 0.5); background: var(--surface-2); }
.row-main { flex: 1; display: flex; flex-direction: column; gap: 0.15rem; padding: 1rem 0.4rem 1rem 1.15rem; text-decoration: none; min-width: 0; }
.row-title { font-size: 1.12rem; font-weight: 600; }
.row-meta { color: var(--muted); font-size: 0.85rem; }

/* Favourite heart */
.fav {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  margin-right: 0.55rem;
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  color: var(--muted);
}
.fav svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; transition: transform 0.12s ease; }
.fav:hover { color: var(--ember-2); }
.fav:active svg { transform: scale(0.85); }
.fav.is-fav { color: var(--ember); }
.fav.is-fav svg { fill: currentColor; stroke: none; }
.fav.big { width: 48px; height: 48px; margin: 0; }
.fav.big svg { width: 26px; height: 26px; }

/* Song page */
.back { display: inline-block; color: var(--muted); text-decoration: none; font-size: 0.92rem; margin-bottom: 1.3rem; }
.back:hover { color: var(--ember-2); }
.song-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.song-head h1 { font-size: clamp(1.7rem, 6vw, 2.3rem); font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; }
.song-meta { color: var(--muted); margin-top: 0.35rem; }
.song-note {
  margin-top: 1rem;
  color: var(--ember-2);
  background: rgba(255, 122, 47, 0.08);
  border: 1px solid rgba(255, 122, 47, 0.22);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  font-size: 0.9rem;
}
.song-body { margin-top: 1.4rem; }
.section { margin: 1.7rem 0; }
.section-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.16em; color: var(--muted); margin-bottom: 0.7rem; }
.section.chorus { padding-left: 1rem; border-left: 2px solid rgba(255, 122, 47, 0.45); }

.line { font-size: 1.15rem; line-height: 1.35; margin: 0.05rem 0; }
.line.blank { height: 0.9rem; }
.seg { display: inline-block; vertical-align: bottom; }
.chord { display: block; height: 1.25em; line-height: 1.25em; font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.78rem; font-weight: 600; color: var(--chord); white-space: pre; }
.lyric { white-space: pre; }
.hide-chords .chord { display: none; }
.hide-chords .line { line-height: 1.75; }

@media (max-width: 460px) {
  .logo span { display: none; }
  .nav a { padding: 0.4rem 0.55rem; }
  .uname { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .flame, .flame-outer, .flame-inner { animation: none; }
  .btn-primary:hover, .row:hover { transform: none; }
}