/* ── Variables ───────────────────────────────────────────── */
:root {
  --bg:           #121212;
  --surface:      #181818;
  --elevated:     #282828;
  --hover:        #333333;
  --green:        #1DB954;
  --green-hover:  #1ed760;
  --green-dim:    rgba(29, 185, 84, 0.12);
  --text:         #FFFFFF;
  --text-sub:     #B3B3B3;
  --text-muted:   #535353;
  --border:       rgba(255, 255, 255, 0.08);
  --error:        #E91429;
  --error-dim:    rgba(233, 20, 41, 0.12);
  --warning:      #FFA42B;
  --warning-dim:  rgba(255, 164, 43, 0.12);
  --radius:       8px;
  --radius-lg:    16px;
  --transition:   0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --max-w:        720px;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
[hidden] { display: none !important; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ──────────────────────────────────────────────── */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 0 16px;
}

.main {
  flex: 1;
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding-bottom: 56px;
}

/* ── Header ──────────────────────────────────────────────── */
.header {
  padding: 52px 0 36px;
  text-align: center;
}

.header-content { max-width: var(--max-w); margin: 0 auto; }

.header-top {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-bottom: 6px;
}

.header-top .logout-btn {
  position: absolute;
  right: 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.logo-icon { width: 36px; height: 36px; color: var(--green); }

.logo-text {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-subtitle { color: var(--text-sub); font-size: 14px; }

/* ── Search Card ─────────────────────────────────────────── */
.search-section { margin-bottom: 20px; }

.search-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Input row */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 13px;
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  pointer-events: none;
  flex-shrink: 0;
}

.track-input {
  width: 100%;
  padding: 13px 40px 13px 42px;
  background: var(--elevated);
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.track-input::placeholder { color: var(--text-muted); }

.track-input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-dim);
}

.track-input.shake {
  animation: shake 0.38s ease;
  border-color: var(--error) !important;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-7px); }
  40%      { transform: translateX(7px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

.clear-btn {
  position: absolute;
  right: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--hover);
  border: none;
  border-radius: 50%;
  color: var(--text-sub);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.clear-btn:hover { background: var(--text-muted); color: var(--text); }
.clear-btn svg  { width: 13px; height: 13px; }

/* Controls row */
.controls {
  display: flex;
  gap: 10px;
  align-items: center;
}

.format-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.format-label { font-size: 13px; color: var(--text-sub); white-space: nowrap; }

.format-select {
  padding: 10px 12px;
  background: var(--elevated);
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}
.format-select:focus { border-color: var(--green); }

.fetch-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  background: var(--green);
  border: none;
  border-radius: 500px;
  color: #000;
  font-size: 13px;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.fetch-btn:hover {
  background: var(--green-hover);
  transform: scale(1.02);
  box-shadow: 0 4px 18px rgba(29, 185, 84, 0.35);
}
.fetch-btn:active  { transform: scale(0.97); }
.fetch-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-icon { width: 15px; height: 15px; }

/* Example chips */
.examples {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.examples-label { font-size: 12px; color: var(--text-muted); }

.example-chip {
  padding: 4px 12px;
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 500px;
  color: var(--text-sub);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.example-chip:hover {
  background: var(--hover);
  color: var(--text);
  border-color: rgba(255,255,255,0.18);
}

/* ── Loading ─────────────────────────────────────────────── */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 56px 24px;
  color: var(--text-sub);
  font-size: 14px;
}

.bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 32px;
}

.bars span {
  display: block;
  width: 4px;
  background: var(--green);
  border-radius: 2px;
  animation: bar 1s ease-in-out infinite;
}
.bars span:nth-child(1) { animation-delay: 0s;    }
.bars span:nth-child(2) { animation-delay: 0.1s;  }
.bars span:nth-child(3) { animation-delay: 0.2s;  }
.bars span:nth-child(4) { animation-delay: 0.3s;  }
.bars span:nth-child(5) { animation-delay: 0.4s;  }

@keyframes bar {
  0%, 100% { height: 8px;  opacity: 0.4; }
  50%       { height: 32px; opacity: 1;   }
}

/* ── Error Card ──────────────────────────────────────────── */
.error-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--surface);
  border: 1px solid rgba(233, 20, 41, 0.25);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  animation: fadeUp 0.2s ease;
}

.error-card svg {
  width: 36px;
  height: 36px;
  color: var(--error);
  flex-shrink: 0;
  margin-top: 2px;
}

.error-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.error-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.55;
}

/* ── Results ─────────────────────────────────────────────── */
.results-section { animation: fadeUp 0.25s ease; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0);    }
}

.results-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--elevated);
  border-bottom: 1px solid var(--border);
}

.results-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sync-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 500px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.sync-badge.synced   { background: var(--green-dim);   color: var(--green);   }
.sync-badge.unsynced { background: var(--warning-dim); color: var(--warning); }

.lines-count { font-size: 12px; color: var(--text-muted); }

.results-actions { display: flex; gap: 2px; }

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: transparent;
  border: none;
  border-radius: var(--radius);
  color: var(--text-sub);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.action-btn svg { width: 16px; height: 16px; }
.action-btn:hover  { background: var(--hover); color: var(--text); }
.action-btn.active { color: var(--green); background: var(--green-dim); }
.action-btn.copied { color: var(--green); }

/* ── Lyrics ──────────────────────────────────────────────── */
.lyrics-container {
  max-height: 540px;
  overflow-y: auto;
  padding: 10px 0 16px;
}

.lyrics-container::-webkit-scrollbar       { width: 4px; }
.lyrics-container::-webkit-scrollbar-track { background: transparent; }
.lyrics-container::-webkit-scrollbar-thumb { background: var(--hover); border-radius: 4px; }

/* Individual line */
.lyric-line {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 9px 18px;
  margin: 0 8px;
  border-radius: 6px;
  transition: background var(--transition);
  cursor: default;
}
.lyric-line:hover            { background: var(--elevated); }
.lyric-line.active           { background: var(--green-dim); }
.lyric-line.active .words    { color: var(--green); font-weight: 600; }
.lyric-line.active .ts       { color: rgba(29, 185, 84, 0.7); }

.ts {
  font-size: 10px;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 48px;
  letter-spacing: 0.3px;
  transition: color var(--transition);
}

.words {
  font-size: 15px;
  color: var(--text);
  line-height: 1.65;
  transition: color var(--transition), font-weight var(--transition);
}

.words.empty { color: var(--text-muted); font-style: italic; }

/* Raw / pre-formatted (lrc / srt) */
.raw-block {
  margin: 16px 18px;
  padding: 16px;
  background: var(--elevated);
  border-radius: var(--radius);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  color: var(--text-sub);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.8;
  overflow-x: auto;
}

/* ── Karaoke hint bar ─────────────────────────────────────── */
.karaoke-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--green-dim);
  border-bottom: 1px solid rgba(29, 185, 84, 0.2);
  font-size: 12px;
  color: var(--green);
}

.karaoke-hint svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  padding: 20px 0 28px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

.footer a {
  color: var(--text-sub);
  text-decoration: none;
  transition: color var(--transition);
}
.footer a:hover { color: var(--green); }

/* ── Login Page ──────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 24px 16px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px 36px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}

.login-card.shake {
  animation: shake 0.38s ease;
}

.login-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.login-logo svg {
  width: 52px;
  height: 52px;
  color: var(--green);
}

.login-title {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.3px;
  margin-bottom: 28px;
}

/* Fields */
.field-group {
  margin-bottom: 16px;
}

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.field-input {
  width: 100%;
  padding: 13px 14px;
  background: var(--elevated);
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.field-input::placeholder { color: var(--text-muted); }

.field-input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-dim);
}

/* Password wrapper */
.pwd-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.pwd-wrapper .field-input {
  padding-right: 46px;
}

.pwd-toggle {
  position: absolute;
  right: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition);
}

.pwd-toggle:hover { color: var(--text-sub); }

.pwd-toggle svg {
  width: 18px;
  height: 18px;
}

/* Login error */
.login-error {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  background: var(--error-dim);
  border: 1px solid rgba(233, 20, 41, 0.3);
  border-radius: var(--radius);
  color: #ff6b7a;
  font-size: 13px;
  margin-bottom: 16px;
  animation: fadeUp 0.2s ease;
}

.login-error svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--error);
}

/* Remember me */
.remember-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-sub);
  cursor: pointer;
  user-select: none;
  margin-bottom: 24px;
}

.remember-check { display: none; }

.remember-box {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--text-muted);
  border-radius: 4px;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.remember-check:checked + .remember-box {
  background: var(--green);
  border-color: var(--green);
}

.remember-check:checked + .remember-box::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid #000;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

/* Login button */
.login-btn {
  width: 100%;
  padding: 14px;
  background: var(--green);
  border: none;
  border-radius: 500px;
  color: #000;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.login-btn:hover:not(:disabled) {
  background: var(--green-hover);
  transform: scale(1.01);
  box-shadow: 0 4px 18px rgba(29, 185, 84, 0.35);
}

.login-btn:active:not(:disabled) { transform: scale(0.98); }

.login-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Logout button (main app header) ─────────────────────── */
.logout-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 500px;
  color: var(--text-sub);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.logout-btn svg { width: 14px; height: 14px; }

.logout-btn:hover {
  background: var(--elevated);
  color: var(--text);
  border-color: rgba(255,255,255,0.2);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 580px) {
  .header { padding: 36px 0 24px; }
  .logo-text { font-size: 22px; }
  .logo-icon { width: 28px; height: 28px; }

  .search-card { padding: 16px; gap: 12px; }

  .controls { flex-wrap: wrap; }
  .format-group { width: 100%; }
  .format-select { flex: 1; }
  .fetch-btn { width: 100%; }

  .lyrics-container { max-height: 420px; }
  .lyric-line { padding: 8px 12px; margin: 0 4px; }
  .words { font-size: 14px; }

  .error-card { flex-direction: column; align-items: center; text-align: center; }
}