/* ─── Reset & base ───────────────────────────────────────────────────────── */

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

:root {
  --bg:          #0f0f11;
  --surface:     #1c1c21;
  --border:      #2e2e38;
  --accent:      #7c6af7;
  --accent-beat: #f7c06a;
  --text:        #e8e8f0;
  --text-muted:  #7a7a90;
  --btn-radius:  10px;
  --transition:  0.15s ease;
}

[data-theme="light"] {
  --bg:         #f4f4f8;
  --surface:    #ffffff;
  --border:     #d0d0dc;
  --accent:     #5b4ee0;
  --accent-beat:#d4900a;
  --text:       #18181f;
  --text-muted: #6b6b80;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  /*min-height: 100vh;*/
}

/* ─── Layout ─────────────────────────────────────────────────────────────── */

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 40px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  width: min(420px, 92vw);
  margin-top: 5rem;
}

/* ─── Beat indicator ─────────────────────────────────────────────────────── */

.beat-indicator {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--transition);
}

@keyframes pulse {
  0%   { transform: scale(1.25); background: var(--accent); box-shadow: 0 0 24px var(--accent); }
  100% { transform: scale(1);    background: var(--border);  box-shadow: none; }
}

@keyframes pulse-accent {
  0%   { transform: scale(1.35); background: var(--accent-beat); box-shadow: 0 0 32px var(--accent-beat); }
  100% { transform: scale(1);    background: var(--border);       box-shadow: none; }
}

.beat-indicator.pulse {
  animation: pulse 0.18s ease-out forwards;
}

.beat-indicator.pulse-accent {
  animation: pulse-accent 0.18s ease-out forwards;
}

/* ─── BPM display ────────────────────────────────────────────────────────── */

.bpm-display {
  display: flex;
  align-items: center;
  gap: 16px;
}

.bpm-value {
  font-size: 5rem;
  font-weight: 700;
  letter-spacing: -2px;
  min-width: 3ch;
  text-align: center;
  cursor: pointer;
  user-select: none;
  line-height: 1;
}

.bpm-value:hover {
  color: var(--accent);
}

.bpm-edit-input {
  font-size: 5rem;
  font-weight: 700;
  letter-spacing: -2px;
  width: 3.5ch;
  text-align: center;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--accent);
  color: var(--text);
  outline: none;
  line-height: 1;
}

.bpm-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.bpm-btn:hover {
  background: var(--border);
  border-color: var(--accent);
}

.bpm-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-top: -18px;
}

/* ─── BPM slider ─────────────────────────────────────────────────────────── */

.bpm-slider {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ─── Beat counter ───────────────────────────────────────────────────────── */

.beat-counter {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  gap: 4px;
  align-items: baseline;
}

#beat-display {
  color: var(--text);
  min-width: 1ch;
  text-align: right;
}

.beat-separator {
  color: var(--border);
}

/* ─── Row controls (time sig, volume) ────────────────────────────────────── */

.time-sig-row,
.volume-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.time-sig-row label,
.volume-row label {
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  flex-shrink: 0;
}

.time-sig-select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--btn-radius);
  color: var(--text);
  padding: 6px 10px;
  font-size: 0.95rem;
  cursor: pointer;
  outline: none;
}

.time-sig-select:focus {
  border-color: var(--accent);
}

.volume-slider {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */

.controls {
  display: flex;
  gap: 12px;
  width: 100%;
}

.btn-primary,
.btn-secondary {
  flex: 1;
  padding: 14px 0;
  border: none;
  border-radius: var(--btn-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary.running {
  background: #e05c5c;
}

.btn-primary:hover  { opacity: 0.88; }
.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-secondary:hover { opacity: 0.75; }

.btn-primary:active,
.btn-secondary:active {
  transform: scale(0.97);
}

/* ─── Theme toggle ───────────────────────────────────────────────────────── */

.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  z-index: 10;
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--border);
}

/* ─── Subdivisions & Presets rows ────────────────────────────────────────── */

.subdivision-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.subdivision-row label {
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  flex-shrink: 0;
}

.presets-row {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.presets-row > label {
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.presets-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-btn {
  flex: 1;
  min-width: 60px;
  padding: 8px 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--btn-radius);
  color: var(--text);
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  line-height: 1.4;
  transition: border-color var(--transition), background var(--transition);
}

.preset-btn small {
  display: block;
  color: var(--text-muted);
  font-weight: 400;
}

.preset-btn:hover {
  border-color: var(--accent);
  background: var(--surface);
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */

.site-footer {
  text-align: center;
  padding: 16px;
  font-size: 0.85rem;
  color: var(--text-muted, #888);
}

.site-footer p {
  margin: 4px 0;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 480px) {
  .bpm-value {
    font-size: 4rem;
  }

  .container {
    padding: 28px 20px;
    gap: 18px;
  }
}

@media (max-height: 700px) {
  main.container {
    margin-top: 5%;
  }

  .presets-row {
    display: none;
  }

  .theme-toggle {
    display: none;
  }
}