/* Apple-inspired Pomodoro Timer */

/* CSS Custom Properties */
:root {
    /* Light mode - clean white */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #e8e8ed;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --text-tertiary: #aeaeb2;

    /* Pastel accents */
    --accent-work: #ff6b6b;
    --accent-work-soft: #ffebeb;
    --accent-break: #a8e6cf;
    --accent-break-soft: #e8f8f0;
    --accent-blue: #74b9ff;
    --accent-blue-soft: #e8f4ff;
    --accent-purple: #a29bfe;
    --accent-purple-soft: #f0eeff;

    /* UI elements */
    --card-bg: #ffffff;
    --card-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 4px 30px rgba(0, 0, 0, 0.1);
    --border-color: rgba(0, 0, 0, 0.06);
    --divider: rgba(0, 0, 0, 0.08);

    /* Interactive */
    --button-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --input-bg: #f5f5f7;
    --slider-track: #e8e8ed;
}

body.dark-mode {
    /* Dark mode - true black */
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --text-primary: #f5f5f7;
    --text-secondary: #8e8e93;
    --text-tertiary: #636366;

    /* Pastel accents (slightly adjusted for dark) */
    --accent-work: #ff8a8a;
    --accent-work-soft: rgba(255, 107, 107, 0.15);
    --accent-break: #7dd3a8;
    --accent-break-soft: rgba(168, 230, 207, 0.15);
    --accent-blue: #5dade2;
    --accent-blue-soft: rgba(116, 185, 255, 0.15);
    --accent-purple: #b8b0ff;
    --accent-purple-soft: rgba(162, 155, 254, 0.15);

    /* UI elements */
    --card-bg: #1c1c1e;
    --card-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 4px 30px rgba(0, 0, 0, 0.5);
    --border-color: rgba(255, 255, 255, 0.08);
    --divider: rgba(255, 255, 255, 0.1);

    /* Interactive */
    --button-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --input-bg: #2c2c2e;
    --slider-track: #3a3a3c;
}

/* Base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background-color 0.4s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 380px;
    background-color: var(--card-bg);
    border-radius: 24px;
    padding: 36px 28px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    transition: all 0.4s ease;
}

body.dark-mode .container {
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Screen management */
.screen {
    display: none;
    opacity: 0;
    transform: scale(0.98);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen.active {
    display: block;
    opacity: 1;
    transform: scale(1);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 36px;
}

.logo-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
}

.logo-text {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--accent-work) 0%, #ff8a8a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Typography */
h1 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 32px;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

h2 {
    font-size: 24px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.3px;
    color: var(--text-primary);
}

/* Slider elements */
.slider-group {
    margin-bottom: 24px;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.slider-header label {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
}

.slider-value {
    font-size: 17px;
    font-weight: 600;
    color: var(--accent-work);
    min-width: 65px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--slider-track);
    outline: none;
    transition: background 0.2s ease;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.slider::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: var(--slider-track);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Ambient sound selector */
.ambient-section {
    margin-bottom: 28px;
}

.ambient-section > label {
    display: block;
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.ambient-options {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.ambient-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 12px;
    background: var(--input-bg);
    border: 2px solid transparent;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.25s ease;
    min-width: 72px;
}

.ambient-btn:hover {
    background: var(--accent-blue-soft);
    transform: translateY(-2px);
}

.ambient-btn.active {
    background: var(--accent-blue-soft);
    border-color: var(--accent-blue);
}

.ambient-icon {
    font-size: 24px;
    line-height: 1;
}

.ambient-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.ambient-btn.active .ambient-label {
    color: var(--accent-blue);
}

.ambient-btn.small {
    padding: 10px;
    min-width: auto;
    flex-direction: row;
    font-size: 20px;
    border-radius: 12px;
}

.ambient-options.small {
    gap: 6px;
}

.volume-control {
    display: none;
    align-items: center;
    gap: 12px;
    margin-top: 14px;
    padding: 12px 14px;
    background: var(--input-bg);
    border-radius: 12px;
}

.volume-control.visible {
    display: flex;
}

.volume-control label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}

.volume-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--slider-track);
    outline: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.volume-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    border: none;
}

.timer-ambient {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

/* Toggle switches */
.toggles {
    display: flex;
    justify-content: space-between;
    margin: 28px 0;
    padding: 0 4px;
}

.toggle-group {
    display: flex;
    align-items: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
}

.toggle-switch {
    position: relative;
    width: 46px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--slider-track);
    transition: 0.3s ease;
    border-radius: 28px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s ease;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--accent-blue);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(18px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-size: 17px;
    font-weight: 600;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: -0.2px;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    width: 100%;
    background: var(--accent-work);
    color: white;
    box-shadow: 0 4px 14px rgba(255, 107, 107, 0.35);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.45);
}

.btn-secondary {
    background: var(--input-bg);
    color: var(--text-primary);
    padding: 12px 24px;
    font-size: 15px;
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

/* Timer screen */
.timer-container {
    position: relative;
    width: 220px;
    height: 220px;
    margin: 0 auto 28px;
}

.progress-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--slider-track);
    stroke-width: 6;
}

.progress-ring-progress {
    fill: none;
    stroke: var(--accent-work);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke 0.4s ease;
    filter: drop-shadow(0 0 8px rgba(255, 107, 107, 0.4));
}

body.break-mode .progress-ring-progress {
    stroke: var(--accent-break);
    filter: drop-shadow(0 0 8px rgba(168, 230, 207, 0.4));
}

.timer-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#countdown {
    font-size: 52px;
    font-weight: 300;
    font-variant-numeric: tabular-nums;
    letter-spacing: -2px;
    color: var(--text-primary);
}

.timer-info {
    text-align: center;
    margin-bottom: 28px;
}

.mode-label {
    display: block;
    font-size: 17px;
    font-weight: 600;
    color: var(--accent-work);
    margin-bottom: 6px;
    transition: color 0.3s ease;
}

body.break-mode .mode-label {
    color: var(--accent-break);
}

.run-counter {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-tertiary);
}

.timer-controls {
    display: flex;
    gap: 12px;
    justify-content: center;
}

/* Summary screen */
.summary-content {
    text-align: center;
}

.celebration-icon {
    font-size: 56px;
    margin-bottom: 24px;
    animation: float 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--input-bg);
    border-radius: 16px;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 36px;
    font-weight: 600;
    color: var(--accent-work);
    font-variant-numeric: tabular-nums;
}

.stat-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Responsive */
@media (min-width: 768px) {
    .container {
        max-width: 420px;
        padding: 44px 36px;
    }

    h1 {
        font-size: 32px;
    }

    #countdown {
        font-size: 64px;
    }

    .timer-container {
        width: 260px;
        height: 260px;
    }
}

/* Wake lock warning */
.wake-lock-warning {
    text-align: center;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-top: 20px;
    padding: 12px;
    background-color: var(--input-bg);
    border-radius: 10px;
}

/* Subtle animations */
@media (prefers-reduced-motion: no-preference) {
    .container {
        animation: fadeIn 0.5s ease;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Selection color */
::selection {
    background: var(--accent-blue-soft);
    color: var(--text-primary);
}