:root {
    /* Fonts */
    --font-ui: 'Inter', -apple-system, sans-serif;
    
    /* Light Mode Variables */
    --bg-color-light: #f5f5f7;
    --text-primary-light: #1d1d1f;
    --text-secondary-light: #86868b;
    --pill-bg-light: #ffffff;
    --pill-shadow-light: 0 20px 40px rgba(0,0,0,0.08);
    --divider-light: #e5e5ea;
    --btn-secondary-bg-light: #e5e5ea;
    --btn-secondary-text-light: #1d1d1f;
    
    /* Dark Mode Variables */
    --bg-color-dark: #000000;
    --text-primary-dark: #f5f5f7;
    --text-secondary-dark: #86868b;
    --pill-bg-dark: #1c1c1e;
    --pill-shadow-dark: 0 20px 40px rgba(0,0,0,0.5);
    --divider-dark: #38383a;
    --btn-secondary-bg-dark: #333336;
    --btn-secondary-text-dark: #ffffff;

    /* Global Colors (Accents) */
    --accent-orange: #ff9f0a; /* Apple Timer Orange */
    --accent-orange-dim: rgba(255, 159, 10, 0.2);
    --accent-green: #30d158;
    --accent-red: #ff453a;
}

/* Default to Light Mode */
body {
    --bg-color: var(--bg-color-light);
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --pill-bg: var(--pill-bg-light);
    --pill-shadow: var(--pill-shadow-light);
    --divider: var(--divider-light);
    --btn-secondary-bg: var(--btn-secondary-bg-light);
    --btn-secondary-text: var(--btn-secondary-text-light);
}

/* Dark Mode Overrides */
body.dark-mode {
    --bg-color: var(--bg-color-dark);
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --pill-bg: var(--pill-bg-dark);
    --pill-shadow: var(--pill-shadow-dark);
    --divider: var(--divider-dark);
    --btn-secondary-bg: var(--btn-secondary-bg-dark);
    --btn-secondary-text: var(--btn-secondary-text-dark);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-ui);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Theme Toggle */
.theme-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 10px;
    border-radius: 50%;
    transition: color 0.2s;
}
.theme-btn:hover { color: var(--accent-orange); }
.hidden { display: none !important; }

/* App Container */
.app-container {
    width: 100%;
    max-width: 480px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 60px 20px 20px 20px;
}

/* The Dynamic Pill */
.timer-pill {
    background-color: var(--pill-bg);
    border-radius: 48px;
    padding: 30px;
    box-shadow: var(--pill-shadow);
    position: relative;
    margin-bottom: 30px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, outline 0.2s ease;
    /* Optional: subtle border */
    border: 1px solid var(--divider);
}

/* Orange Glow when running */
.timer-pill.running {
    outline: 3px solid var(--accent-orange);
    outline-offset: -3px;
    box-shadow: 0 0 30px var(--accent-orange-dim);
}

.timer-header {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    margin-bottom: 10px;
}
.timer-bell { color: var(--accent-orange); }

/* Timer Display */
.timer-display {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -2px;
    text-align: center;
    margin: 10px 0 30px 0;
    font-variant-numeric: tabular-nums;
}

/* Controls inside Pill */
.controls {
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
}

.control-btn {
    width: 130px;
    height: 54px;
    border-radius: 27px; /* Wide pill shape */
    border: 1px solid rgba(255, 255, 255, 0.05); /* Slight border for separation */
    outline: none;
    cursor: pointer;
    font-family: var(--font-ui);
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.control-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
    filter: brightness(1.1);
}
.control-btn:active:not(:disabled) { 
    transform: translateY(1px); 
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.btn-primary.start {
    background-color: var(--accent-orange-dim);
    color: var(--accent-orange);
}
.btn-primary.stop {
    background-color: rgba(255, 69, 58, 0.15);
    color: var(--accent-red);
}
.btn-secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
}
.btn-secondary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

/* Statistics Section */
.stats-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 25px;
    padding: 15px;
    background-color: var(--pill-bg);
    border-radius: 16px;
    box-shadow: var(--pill-shadow);
    border: 1px solid var(--divider);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.stat-val {
    font-size: 1.1rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.fastest-stat .stat-val { color: var(--accent-green); }
.slowest-stat .stat-val { color: var(--accent-red); }
.average-stat .stat-val { color: var(--text-primary); }

/* Laps Table */
.laps-table-container {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: none; /* Hide scrollbar for sleekness */
}
.laps-table-container::-webkit-scrollbar { display: none; }

.laps-table {
    width: 100%;
    border-collapse: collapse;
    text-align: right;
}

.laps-table th {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--divider);
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    transition: background-color 0.3s;
}

.laps-table th:first-child,
.laps-table td:first-child {
    text-align: left;
}

.laps-table td {
    padding: 15px 0;
    font-size: 1.15rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    border-bottom: 1px solid var(--divider);
}

.laps-table tr {
    animation: slideDown 0.2s ease-out forwards;
}

/* Lap Highlights */
.laps-table tr.fastest { color: var(--accent-green); }
.laps-table tr.slowest { color: var(--accent-red); }

/* Keyboard Hint */
.shortcuts-hint {
    position: fixed;
    bottom: 20px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-align: center;
    width: 100%;
}
.key {
    background-color: var(--pill-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsiveness */
@media (max-width: 400px) {
    .timer-display { font-size: 4rem; }
    .timer-pill { padding: 20px; }
}