* { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    padding: 8px;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
  }

  /* -- Tabs -- */
  .tab-bar {
    display: flex;
    gap: 0;
    margin-bottom: -1px;
    position: relative;
    z-index: 1;
    flex-shrink: 0;
  }
  .tab-btn {
    padding: 4px 12px;
    background: var(--sz-color-button-face);
    border: 1px solid var(--sz-color-button-shadow);
    border-bottom: none;
    border-radius: 3px 3px 0 0;
    cursor: default;
    font: inherit;
    color: var(--sz-color-button-text);
    outline: none;
    margin-right: 2px;
    position: relative;
  }
  .tab-btn.active {
    background: var(--sz-color-button-face);
    border-bottom: 1px solid var(--sz-color-button-face);
    font-weight: bold;
    z-index: 2;
  }
  .tab-btn:not(.active):hover {
    background: var(--sz-color-button-light);
  }
  .tab-body {
    border: 1px solid var(--sz-color-button-shadow);
    background: var(--sz-color-button-face);
    padding: 10px;
    flex: 1;
    overflow: auto;
    position: relative;
  }
  .tab-panel { display: none; height: 100%; }
  .tab-panel.active { display: block; }

  /* -- Common controls -- */
  .xp-btn {
    background: var(--sz-color-button-face);
    color: var(--sz-color-button-text);
    border: 2px outset;
    border-color: var(--sz-color-button-highlight) var(--sz-color-button-dark-shadow) var(--sz-color-button-dark-shadow) var(--sz-color-button-highlight);
    font: inherit;
    padding: 2px 12px;
    min-height: 22px;
    cursor: default;
    outline: none;
  }
  .xp-btn:hover { background: var(--sz-color-button-light); }
  .xp-btn:active {
    border-style: inset;
    border-color: var(--sz-color-button-dark-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-dark-shadow);
  }
  .xp-input, .xp-select {
    background: var(--sz-color-window);
    color: var(--sz-color-window-text);
    border: 2px inset;
    border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
    font: inherit;
    padding: 1px 4px;
    outline: none;
  }
  .xp-select { padding: 1px 2px; }
  .group-box {
    border: 1px solid var(--sz-color-button-shadow);
    padding: 10px 8px 8px;
    margin-bottom: 8px;
    position: relative;
  }
  .group-box > legend {
    padding: 0 4px;
    font-size: 11px;
    color: var(--sz-color-button-text);
  }

  /* -- Tab 1: Date & Time -- */
  .datetime-layout {
    display: flex;
    gap: 12px;
    height: 100%;
  }
  .datetime-left { flex: 1; min-width: 0; overflow: hidden; }
  .datetime-right { width: 180px; display: flex; flex-direction: column; align-items: center; flex-shrink: 0; }

  /* Calendar */
  .cal-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 4px;
    flex-wrap: wrap;
  }
  .cal-nav .xp-btn { padding: 0 6px; min-width: 20px; min-height: 20px; font-weight: bold; flex-shrink: 0; }
  .cal-nav .xp-select { flex: 1; min-width: 60px; }
  .cal-year-wrap { display: flex; align-items: center; gap: 2px; flex-shrink: 0; }
  .cal-year-wrap .xp-input { width: 54px; text-align: center; }
  .cal-year-wrap .xp-btn { padding: 0; width: 16px; min-height: 10px; font-size: 8px; line-height: 1; }
  .cal-year-spinners { display: flex; flex-direction: column; gap: 1px; }
  .cal-grid {
    display: grid;
    grid-template-columns: auto repeat(7, 1fr);
    gap: 1px;
    text-align: center;
    font-size: 11px;
  }
  .cal-cw {
    font-size: 9px;
    color: #2266cc;
    padding: 2px 3px 2px 0;
    text-align: right;
    white-space: nowrap;
    align-self: center;
  }
  .cal-cw-header {
    font-size: 9px;
    font-weight: bold;
    color: #2266cc;
    padding: 2px 3px 2px 0;
    text-align: right;
  }
  .cal-header {
    font-weight: bold;
    padding: 2px 0;
    color: var(--sz-color-button-text);
  }
  .cal-day {
    padding: 2px 0;
    cursor: default;
    border: 1px solid transparent;
    border-radius: 2px;
  }
  .cal-day:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
  .cal-day.today {
    border-color: var(--sz-color-highlight);
    font-weight: bold;
  }
  .cal-day.selected {
    background: var(--sz-color-highlight);
    color: var(--sz-color-highlight-text);
  }
  .cal-day.other-month { color: var(--sz-color-gray-text); }
  .cal-header.sunday, .cal-day.sunday { color: #c00; }
  .cal-day.other-month.sunday { color: #c99; }
  .cal-day.sunday:hover, .cal-day.selected.sunday { color: var(--sz-color-highlight-text); }
  .cal-week-info {
    margin-top: 6px;
    text-align: center;
    font-size: 11px;
    color: var(--sz-color-button-text);
    padding: 3px 0;
    border-top: 1px solid var(--sz-color-button-shadow);
  }
  .cal-week-info .cw-number { font-weight: bold; color: #2266cc; }

  /* Analog clock */
  .clock-face {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 2px solid var(--sz-color-button-shadow);
    background: var(--sz-color-window);
    position: relative;
    margin: 8px 0;
    flex-shrink: 0;
  }
  .clock-marker {
    position: absolute;
    width: 2px;
    background: var(--sz-color-button-text);
    left: 50%;
    top: 4px;
    transform-origin: 50% calc(75px - 4px);
  }
  .clock-marker.major { height: 10px; }
  .clock-marker.minor { height: 5px; width: 1px; }
  .clock-hand {
    position: absolute;
    left: 50%;
    bottom: 50%;
    transform-origin: 50% 100%;
    border-radius: 2px;
  }
  /* Intentional clock hand colors */
  .clock-hand.hour { width: 4px; height: 38px; background: var(--sz-color-button-text); margin-left: -2px; }
  .clock-hand.minute { width: 3px; height: 50px; background: var(--sz-color-button-text); margin-left: -1.5px; }
  .clock-hand.second { width: 1px; height: 55px; background: #c00; margin-left: -0.5px; }
  .clock-center { position: absolute; width: 6px; height: 6px; background: var(--sz-color-button-text); border-radius: 50%; left: 50%; top: 50%; transform: translate(-50%, -50%); }
  .digital-time {
    font-family: 'Lucida Console', 'Consolas', monospace;
    font-size: 16px;
    text-align: center;
    margin: 4px 0;
    color: var(--sz-color-window-text);
  }
  .timezone-display {
    font-size: 10px;
    text-align: center;
    color: var(--sz-color-gray-text);
  }

  /* -- Tab 2: Alarms -- */
  .alarm-list {
    max-height: 150px;
    overflow-y: auto;
    border: 2px inset;
    border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
    background: var(--sz-color-window);
    margin-bottom: 8px;
  }
  .alarm-item {
    display: flex;
    align-items: center;
    padding: 3px 6px;
    gap: 8px;
    border-bottom: 1px solid var(--sz-color-button-light);
    font-size: 11px;
  }
  .alarm-item:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
  .alarm-item .alarm-time { font-family: 'Lucida Console', monospace; font-weight: bold; min-width: 50px; }
  .alarm-item .alarm-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .alarm-item .alarm-repeat { color: var(--sz-color-gray-text); font-size: 10px; min-width: 60px; }
  .alarm-item:hover .alarm-repeat { color: var(--sz-color-highlight-text); }
  .alarm-form { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
  .alarm-form label { font-size: 11px; }
  .alarm-notification {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--sz-color-info-window);
    border: 2px solid var(--sz-color-button-shadow);
    padding: 12px 16px;
    text-align: center;
    z-index: 100;
    box-shadow: 2px 2px 6px rgba(0,0,0,0.3);
    display: none;
    min-width: 200px;
  }
  .alarm-notification.visible { display: block; }
  .alarm-notification .alarm-notif-label { font-weight: bold; font-size: 13px; margin-bottom: 8px; }

  /* -- Tab 3: Stopwatch -- */
  .sw-display {
    font-family: 'Lucida Console', 'Consolas', monospace;
    font-size: 36px;
    text-align: center;
    padding: 16px 0;
    color: var(--sz-color-window-text);
    background: var(--sz-color-window);
    border: 2px inset;
    border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
    margin-bottom: 8px;
  }
  .sw-buttons { display: flex; gap: 6px; justify-content: center; margin-bottom: 8px; }
  .lap-list {
    max-height: 120px;
    overflow-y: auto;
    border: 2px inset;
    border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
    background: var(--sz-color-window);
    font-family: 'Lucida Console', monospace;
    font-size: 11px;
    padding: 2px 6px;
  }
  .lap-item { padding: 2px 0; display: flex; justify-content: space-between; border-bottom: 1px dotted var(--sz-color-button-light); }

  /* -- Tab 4: Timer -- */
  .timer-inputs { display: flex; gap: 4px; align-items: center; justify-content: center; margin-bottom: 8px; }
  .timer-inputs .xp-input { width: 42px; text-align: center; font-size: 14px; }
  .timer-inputs span { font-size: 14px; font-weight: bold; }
  .timer-display {
    font-family: 'Lucida Console', 'Consolas', monospace;
    font-size: 36px;
    text-align: center;
    padding: 12px 0;
    color: var(--sz-color-window-text);
  }
  .timer-progress-wrap {
    width: 100%;
    height: 18px;
    border: 2px inset;
    border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
    background: var(--sz-color-window);
    margin-bottom: 8px;
  }
  .timer-progress-bar {
    height: 100%;
    background: var(--sz-color-highlight);
    transition: width 0.25s linear;
    width: 0;
  }
  .timer-buttons { display: flex; gap: 6px; justify-content: center; }

  /* -- Tab 5: World Clock -- */
  .wc-add { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; }
  .wc-add .xp-select { flex: 1; }
  .wc-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 8px;
    max-height: 220px;
    overflow-y: auto;
  }
  .wc-card {
    border: 1px solid var(--sz-color-button-shadow);
    background: var(--sz-color-window);
    padding: 6px;
    text-align: center;
    position: relative;
  }
  .wc-card .wc-name { font-weight: bold; font-size: 11px; margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .wc-card .wc-remove {
    position: absolute;
    top: 2px;
    right: 4px;
    cursor: default;
    font-size: 10px;
    color: var(--sz-color-gray-text);
    border: none;
    background: none;
    font: inherit;
    padding: 0;
  }
  .wc-card .wc-remove:hover { color: #c00; }
  .wc-mini-clock {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 1px solid var(--sz-color-button-shadow);
    background: var(--sz-color-window);
    position: relative;
    margin: 4px auto;
  }
  .wc-mini-clock .clock-hand.hour { width: 2px; height: 16px; margin-left: -1px; }
  .wc-mini-clock .clock-hand.minute { width: 1.5px; height: 22px; margin-left: -0.75px; }
  .wc-mini-clock .clock-center { width: 3px; height: 3px; }
  .wc-card .wc-time { font-family: 'Lucida Console', monospace; font-size: 13px; margin: 2px 0; }
  .wc-card .wc-offset { font-size: 10px; color: var(--sz-color-gray-text); }

  /* -- World map -- */
  .wc-map-wrap {
    border: 2px inset;
    border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
    margin-bottom: 8px;
    line-height: 0;
    overflow: hidden;
  }
  .wc-map-wrap svg { width: 100%; height: auto; display: block; }
  .wc-map-land { fill: #5a7a4a; stroke: #4a6a3a; stroke-width: 0.5; }
  .wc-map-night { fill: rgba(0,0,20,0.3); pointer-events: none; }
  .wc-map-dot { fill: #aaa; stroke: #888; stroke-width: 0.3; cursor: pointer; }
  .wc-map-dot:hover { fill: #ffcc00; stroke: #fff; stroke-width: 0.8; }
  .wc-map-dot.active { fill: #ff4444; stroke: #fff; stroke-width: 0.6; }
  .wc-map-label { font-size: 5px; fill: #fff; text-anchor: middle; pointer-events: none; paint-order: stroke; stroke: rgba(0,0,0,0.6); stroke-width: 0.8px; font-family: sans-serif; }