:root {
  --bg: #2b2f31;
  --panel: #303538;
  --accent: #f0b000;
  --muted: #9aa0a4;
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--muted);
}
.container {
  max-width: 1000px;
  margin: 24px auto;
  padding: 20px;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
h1 {
  color: var(--accent);
  margin: 0;
  font-weight: 700;
}
.tabs {
  display: flex;
  gap: 8px;
}
.tab {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}
.tab.active {
  background: var(--panel);
  color: var(--accent);
}
.panel {
  display: none;
  padding: 18px;
  background: var(--panel);
  border-radius: 8px;
  margin-bottom: 16px;
}
.panel.visible {
  display: block;
}
.big-digits {
  font-family: monospace, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas;
  font-size: 72px;
  color: var(--accent);
  text-align: center;
  padding: 24px;
}
.btn-row {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 12px;
}
button {
  background: var(--accent);
  border: none;
  color: #111;
  padding: 10px 14px;
  border-radius: 6px;
  cursor: pointer;
}
button[disabled] {
  opacity: 0.4;
  cursor: default;
}
.input-group {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: center;
}
input[type="number"],
input[type="time"],
input[type="text"] {
  padding: 6px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: #fff3;
  color: #fff;
  min-width: 80px;
}
.laps,
.alarms {
  list-style: none;
  padding: 10px;
  margin: 12px 0;
  border-top: 1px dashed rgba(255, 255, 255, 0.04);
}
.laps li,
.alarms li {
  padding: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.02);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.notification {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: var(--panel);
  padding: 12px;
  border-radius: 8px;
  border: 2px solid var(--accent);
  color: var(--accent);
  display: flex;
  gap: 12px;
  align-items: center;
}
.hidden {
  display: none;
}
footer {
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
}

@media (max-width: 600px) {
  .big-digits {
    font-size: 42px;
  }
  .container {
    padding: 12px;
  }
}