/* MediTimer - Nature-Inspired Meditation Timer */

/* CSS Variables */
:root {
    --bg-primary: #f5f0e8;
    --bg-secondary: #ebe5d9;
    --color-primary: #5d7a5d;
    --color-primary-dark: #4a634a;
    --color-accent: #8b7355;
    --color-accent-light: #a08b70;
    --color-text: #3d3225;
    --color-text-muted: #6b5d4d;
    --color-white: #ffffff;
    --shadow-soft: 0 2px 8px rgba(61, 50, 37, 0.1);
    --shadow-medium: 0 4px 16px rgba(61, 50, 37, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.5;
}

/* Container */
.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* Main Content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Timer Display */
.timer-display {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-medium);
    cursor: ns-resize;
    user-select: none;
    touch-action: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.timer-display:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(61, 50, 37, 0.18);
}

.timer-display:active {
    transform: translateY(0);
}

.timer-display.running {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.timer-display.running #timerText {
    color: var(--color-white);
}

.timer-display.paused {
    background: var(--color-accent);
}

.timer-display.paused #timerText {
    color: var(--color-white);
    animation: pulse 1.5s ease-in-out infinite;
}

.timer-display.completed {
    background: linear-gradient(135deg, #7a9a7a 0%, var(--color-primary) 100%);
}

#timerText {
    font-size: 4.5rem;
    font-weight: 300;
    font-variant-numeric: tabular-nums;
    color: var(--color-text);
    letter-spacing: 0.02em;
    transition: color var(--transition-normal);
}

.timer-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: -0.75rem;
}

/* Section Titles */
.section-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

/* Duration Section */
.duration-section {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-soft);
}

.preset-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.preset-btn {
    flex: 1;
    min-width: 60px;
    padding: 0.625rem 0.5rem;
    border: 2px solid var(--bg-secondary);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-btn:hover {
    border-color: var(--color-primary);
    background: var(--bg-secondary);
}

.preset-btn.active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
}

/* Custom Duration */
.custom-duration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.adjust-btn {
    width: 44px;
    height: 44px;
    border: 2px solid var(--bg-secondary);
    background: var(--bg-primary);
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.adjust-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
}

.custom-duration input {
    width: 70px;
    padding: 0.5rem;
    border: 2px solid var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    text-align: center;
    color: var(--color-text);
    background: var(--color-white);
}

.custom-duration input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.custom-duration .unit {
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

/* Interval Section */
.interval-section {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-soft);
}

.interval-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Toggle Switch */
.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.toggle-label input {
    display: none;
}

.toggle-switch {
    width: 48px;
    height: 28px;
    background: var(--bg-secondary);
    border-radius: 14px;
    position: relative;
    transition: background var(--transition-fast);
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: var(--color-white);
    border-radius: var(--radius-full);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
    transition: transform var(--transition-fast);
}

.toggle-label input:checked + .toggle-switch {
    background: var(--color-primary);
}

.toggle-label input:checked + .toggle-switch::after {
    transform: translateX(20px);
}

.toggle-text {
    font-size: 0.95rem;
    color: var(--color-text);
}

.interval-controls select {
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 2px solid var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-white);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b5d4d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

.interval-controls select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.interval-controls select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Sound Section */
.sound-section {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-soft);
}

.sound-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sound-controls select {
    flex: 1;
    padding: 0.625rem 2rem 0.625rem 0.75rem;
    border: 2px solid var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-white);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b5d4d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

.sound-controls select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.preview-btn {
    width: 44px;
    height: 44px;
    border: 2px solid var(--bg-secondary);
    background: var(--bg-primary);
    border-radius: var(--radius-full);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
}

/* Timer Controls */
.timer-controls {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.control-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn.primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(93, 122, 93, 0.3);
}

.control-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(93, 122, 93, 0.4);
}

.control-btn.primary:active {
    transform: translateY(0);
}

.control-btn.secondary {
    background: var(--bg-secondary);
    color: var(--color-text);
}

.control-btn.secondary:hover {
    background: var(--color-accent-light);
    color: var(--color-white);
}

/* Footer */
footer {
    margin-top: 2rem;
    text-align: center;
}

.shortcuts-hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

kbd {
    display: inline-block;
    padding: 0.15rem 0.4rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.75rem;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(61, 50, 37, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    z-index: 100;
    animation: fadeIn 0.3s ease;
}

.modal[hidden] {
    display: none;
}

.modal-content {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    max-width: 320px;
    width: 100%;
    box-shadow: var(--shadow-medium);
    animation: slideUp 0.3s ease;
}

.completion-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.modal-content h2 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.modal-content p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.modal-content .control-btn {
    width: 100%;
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 400px) {
    .container {
        padding: 1.5rem 1rem;
    }

    #timerText {
        font-size: 3.5rem;
    }

    .preset-buttons {
        gap: 0.375rem;
    }

    .preset-btn {
        padding: 0.5rem 0.25rem;
        font-size: 0.85rem;
        min-width: 50px;
    }

    .shortcuts-hint {
        font-size: 0.7rem;
    }

    .interval-controls {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Dark mode support (optional, follows system preference) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #2a2520;
        --bg-secondary: #3d3530;
        --color-white: #f5f0e8;
        --color-text: #e8e0d5;
        --color-text-muted: #a89a8a;
        --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.4);
    }

    .timer-display {
        background: var(--bg-secondary);
    }

    .duration-section,
    .interval-section,
    .sound-section {
        background: var(--bg-secondary);
    }

    .custom-duration input,
    .interval-controls select,
    .sound-controls select {
        background: var(--bg-primary);
        color: var(--color-text);
    }

    .modal-content {
        background: var(--bg-secondary);
    }
}