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

:root {
  --bg:        #090909;
  --surface:   #111113;
  --surface2:  #1a1a1d;
  --border:    #2a2a2e;
  --text:      #f0ede8;
  --muted:     #666;
  --accent:    #ff5c1a;
  --accent2:   #ffb800;
  --cyan:      #00e5cc;
  --red:       #ff3b5c;
  --green:     #1aff8c;
  --bg-glow:   rgba(255, 92, 26, 0.07);
}

body[data-theme="light"] {
  --bg:        #f5efe8;
  --surface:   #fffaf4;
  --surface2:  #f1e7dc;
  --border:    #d8c8b8;
  --text:      #1a1612;
  --muted:     #7a6e61;
  --accent:    #e4571e;
  --accent2:   #d89a00;
  --cyan:      #009e8f;
  --red:       #d83a58;
  --green:     #1eaf6f;
  --bg-glow:   rgba(228, 87, 30, 0.08);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 16px 48px;
  background-image: radial-gradient(ellipse 80% 50% at 50% -20%, var(--bg-glow) 0%, transparent 70%);
  transition: background 0.25s ease, color 0.25s ease;
}

.app {
  width: 100%;
  max-width: 480px;
}

.header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 28px;
  padding: 0 4px;
}

.header h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 38px;
  letter-spacing: 4px;
  color: var(--text);
  line-height: 1;
}

.header-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
  margin-bottom: 4px;
}

.header-tag {
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: background 0.15s, border-color 0.15s, transform 0.1s, color 0.15s;
}

.theme-toggle:hover {
  background: var(--surface2);
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle:active {
  transform: scale(0.94);
}

.bpm-display,
.setting-block,
.beat-section,
.quickBpmBtn,
.btn-reset,
.nudge-btn,
.btn,
.btn-tap,
select,
input,
#status {
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.bpm-display {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 28px 22px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}

.bpm-display::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(255, 92, 26, 0.4), transparent);
}

.bpm-label {
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 3px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}

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

#bpmDisplay {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 96px;
  line-height: 1;
  color: var(--text);
  letter-spacing: -2px;
  transition: color 0.15s;
  min-width: 180px;
}

#bpmDisplay.pulse {
  color: var(--accent);
}

.bpm-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bpm-nudge {
  display: flex;
  gap: 6px;
}

.nudge-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.nudge-btn:hover {
  background: var(--border);
  border-color: #444;
}

.nudge-btn:active {
  transform: scale(0.93);
}

#bpm {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  padding: 8px 10px;
  width: 88px;
  text-align: center;
}

#bpm:focus {
  outline: none;
  border-color: var(--accent);
}

.bpm-tempo-label {
  font-size: 12px;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
  margin-top: 4px;
  min-height: 16px;
}

.slider-row {
  margin-top: 16px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 8px rgba(255, 92, 26, 0.5);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 14px rgba(255, 92, 26, 0.7);
}


#bpmSlider {
  background: linear-gradient(
    to right,
    var(--accent) 0%,
    var(--accent) var(--fill, 30%),
    var(--border) var(--fill, 30%),
    var(--border) 100%
  );
}

.quick-buttons {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.quickBpmBtn {
  flex: 1;
  padding: 9px 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  cursor: pointer;
  font-weight: 600;
}

.quickBpmBtn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255, 92, 26, 0.06);
}

.quickBpmBtn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255, 92, 26, 0.12);
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.setting-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
}

.setting-block.full {
  grid-column: 1 / -1;
}

.setting-label {
  font-size: 10px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 2px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.setting-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

select {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  padding: 8px 10px;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

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

.range-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent2);
  min-width: 36px;
  text-align: right;
}

.beat-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px 24px;
  margin-bottom: 16px;
  text-align: center;
}

.beat-counter-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

#beatCounter {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 80px;
  line-height: 1;
  color: var(--text);
  letter-spacing: 2px;
  transition: transform 0.07s ease, color 0.07s ease;
  display: block;
}

#beatCounter.pulse {
  transform: scale(1.12);
  color: var(--accent);
}

#beatCounter.accent-pulse {
  transform: scale(1.18);
  color: var(--accent2);
}

.beat-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.beat-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--border);
  border: 1px solid #333;
  transition: background 0.07s, transform 0.07s, box-shadow 0.07s;
}

.beat-dot.active {
  background: var(--text);
  transform: scale(1.45);
  box-shadow: 0 0 10px rgba(240, 237, 232, 0.5);
}

.beat-dot.accent {
  background: var(--accent2);
  border-color: var(--accent2);
}

.beat-dot.accent.active {
  background: var(--accent2);
  box-shadow: 0 0 14px rgba(255, 184, 0, 0.7);
}

#status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-top: 14px;
  min-height: 16px;
}

#status.running {
  color: var(--green);
}

.transport {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.btn {
  flex: 1;
  padding: 15px 10px;
  border: none;
  border-radius: 14px;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
}

.btn:active {
  transform: scale(0.96);
}

.btn-start {
  background: var(--green);
  color: #06130d;
  box-shadow: 0 4px 20px rgba(26, 255, 140, 0.2);
}

.btn-start:hover {
  box-shadow: 0 4px 28px rgba(26, 255, 140, 0.35);
}

.btn-start:disabled {
  opacity: 0.4;
  cursor: default;
}

.btn-stop {
  background: var(--red);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 59, 92, 0.2);
}

.btn-stop:hover {
  box-shadow: 0 4px 28px rgba(255, 59, 92, 0.35);
}

.btn-stop:disabled {
  opacity: 0.4;
  cursor: default;
}

.secondary-transport {
  display: flex;
  gap: 12px;
}

.btn-tap {
  flex: 2;
  padding: 13px 10px;
  border-radius: 14px;
  border: none;
  background: var(--accent2);
  color: #13100a;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(255, 184, 0, 0.15);
  letter-spacing: 0.5px;
}

.btn-tap:hover {
  box-shadow: 0 4px 28px rgba(255, 184, 0, 0.3);
}

.btn-tap:active {
  transform: scale(0.94);
}

.btn-reset {
  flex: 1;
  padding: 13px 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.5px;
}

.btn-reset:hover {
  border-color: #444;
  color: var(--text);
}

.btn-reset:active {
  transform: scale(0.96);
}

@media (max-width: 440px) {
  #bpmDisplay {
    font-size: 76px;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .setting-block.full {
    grid-column: auto;
  }
}