/* ========================================
   FlipStoppuhr — Static Dark Theme
   ======================================== */

/* Reset/Base */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
}

/* Color Tokens */
:root {
  --bg: #0a0a0a;
  --surface: #161616;
  --surface-2: #1f1f1f;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --primary: #10b981;
  --accent: #ef4444;
  --border: #262626;
}

/* Body */
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  padding: 1.25rem 1.5rem;
  z-index: 10;
}

.brand {
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* Main Container */
.main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  margin-top: 3.5rem;
}

.container {
  width: 100%;
  max-width: 600px;
  text-align: center;
}

/* Time Display */
.time-display {
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(3.5rem, 12vw, 8rem);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 3rem;
  text-shadow: 0 0 40px rgba(16, 185, 129, 0.15);
}

.time-ms {
  font-size: 0.55em;
  color: var(--text-muted);
  vertical-align: middle;
}

/* Button Bar */
.button-bar {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

/* Buttons */
.btn {
  padding: 0.875rem 1.75rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 150ms ease;
  min-width: 90px;
}

.btn:hover:not(:disabled) {
  background: var(--surface-2);
  transform: translateY(-1px);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--primary);
  color: #052e1f;
  border-color: transparent;
  font-weight: 600;
}

.btn--primary:hover:not(:disabled) {
  background: #0ea572;
}

.btn--danger {
  color: var(--accent);
  border-color: rgba(239, 68, 68, 0.3);
}

.btn--danger:hover:not(:disabled) {
  border-color: rgba(239, 68, 68, 0.5);
  background: rgba(239, 68, 68, 0.08);
}

/* Laps Section */
.laps {
  max-width: 420px;
  margin: 3rem auto 0;
}

.laps-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-weight: 600;
  margin: 0 0 1rem;
  text-align: left;
}

.laps-empty {
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.875rem;
  text-align: center;
  margin: 2rem 0;
}

.lap-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.lap-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr 1fr;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  transition: all 120ms ease;
  animation: lapFadeIn 150ms ease-out;
}

.lap-number {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
}

.lap-split {
  color: var(--text);
  font-weight: 500;
}

.lap-total {
  color: var(--text-muted);
  text-align: right;
  font-size: 0.8125rem;
}

.lap-fastest .lap-split {
  color: var(--primary);
  font-weight: 600;
}

.lap-slowest .lap-split {
  color: var(--accent);
  font-weight: 600;
}

@keyframes lapFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
.footer {
  text-align: center;
  padding: 1.5rem;
  margin-top: auto;
}

.keyboard-hint {
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* Responsive */
@media (max-width: 640px) {
  .main {
    padding: 1.5rem 1rem;
  }

  .time-display {
    margin-bottom: 2rem;
    font-size: clamp(2.5rem, 10vw, 6rem);
  }

  .button-bar {
    gap: 0.625rem;
  }

  .btn {
    padding: 0.75rem 1.25rem;
    min-width: 80px;
    font-size: 0.875rem;
  }

  .laps {
    margin-top: 2rem;
  }

  .lap-item {
    padding: 0.625rem 0.875rem;
    font-size: 0.8125rem;
    gap: 0.75rem;
  }

  .lap-number {
    font-size: 0.6875rem;
  }

  .lap-total {
    font-size: 0.75rem;
  }
}

@media (max-width: 375px) {
  .header {
    padding: 1rem 1.25rem;
  }

  .btn {
    flex: 1 1 calc(50% - 0.3125rem);
    min-width: unset;
  }
}