/* Thai Writing Practice Sheet Styles - based on Japanese version */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@300;400;500;700&display=swap');

:root {
    --primary-color: #DC143C;
    --secondary-color: #8B0000;
    --background-color: #FFFFFF;
    --surface-color: #F8F8F8;
    --text-color: #333333;
    --border-color: #E0E0E0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --grid-color: #CCCCCC;
    --stroke-color: #DC143C;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #F44336;
}

[data-theme="dark"] {
    --background-color: #1A1A1A;
    --surface-color: #2D2D2D;
    --text-color: #FFFFFF;
    --border-color: #404040;
    --shadow-color: rgba(255, 255, 255, 0.1);
    --grid-color: #555555;
}

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

body {
    font-family: 'Noto Sans Thai', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header styles */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    position: relative;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: center;
}

header p {
    font-size: 1.2rem;
    text-align: center;
    opacity: 0.9;
}

.theme-toggle {
    position: absolute;
    top: 1rem;
    right: 2rem;
}

.theme-toggle button {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.theme-toggle button:hover {
    background: rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .light-icon,
[data-theme="light"] .dark-icon {
    display: none;
}

main {
    padding: 2rem 0;
}

.controls-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .controls-panel {
        grid-template-columns: 1fr;
    }
}

section {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow-color);
    margin-bottom: 2rem;
}

h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.script-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--surface-color);
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    background: rgba(220, 20, 60, 0.1);
}

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

.character-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    max-height: 300px;
    overflow-y: auto;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--background-color);
}

.character-item {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.5rem;
    font-weight: 500;
    background: var(--surface-color);
    position: relative;
}

.character-item:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.character-item.selected {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.character-item .stroke-count {
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 0.7rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 1px 3px;
    border-radius: 3px;
}

.quick-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input[type="range"] {
    width: 100%;
    margin-right: 1rem;
}

.form-group input[type="checkbox"] {
    margin-right: 0.5rem;
}

.form-group select,
.form-group input[type="range"] {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface-color);
    color: var(--text-color);
    font-size: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(220, 20, 60, 0.1);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.preview-section {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.preview-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.sheet-container {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin: 0 auto;
    max-width: 800px;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.practice-sheet {
    font-family: 'Noto Sans Thai', 'Noto Sans JP', sans-serif;
}

.character-section {
    margin-bottom: 3rem;
    page-break-inside: avoid;
}

.character-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

.character-display {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 80px;
    text-align: center;
}

.character-info {
    flex: 1;
}

.character-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.character-info p {
    margin-bottom: 0.25rem;
    color: var(--text-color);
    opacity: 0.8;
}

.practice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.practice-box {
    aspect-ratio: 1;
    border: 2px solid var(--grid-color);
    border-radius: 8px;
    position: relative;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-color);
}

.practice-box.with-grid {
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 25% 25%;
}

.practice-box.with-stroke-order {
    background-image: 
        radial-gradient(circle at 20% 20%, var(--stroke-color) 2px, transparent 2px),
        radial-gradient(circle at 80% 30%, var(--stroke-color) 2px, transparent 2px),
        radial-gradient(circle at 40% 70%, var(--stroke-color) 2px, transparent 2px),
        radial-gradient(circle at 70% 80%, var(--stroke-color) 2px, transparent 2px);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.stroke-order-demo {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.demo-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.demo-container {
    display: flex;
    align-items: center;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

#strokeCanvas {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: white;
}

.stroke-info {
    text-align: center;
}

.stroke-info h3 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stroke-info p {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

footer {
    background: var(--surface-color);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

@media print {
    header,
    .controls-panel,
    .preview-controls,
    .demo-controls,
    footer {
        display: none !important;
    }

    .sheet-container {
        box-shadow: none;
        border: none;
        padding: 0;
    }

    .practice-sheet {
        font-size: 12pt;
    }

    .character-display {
        font-size: 3rem;
    }

    .practice-box {
        border: 1px solid #000;
        page-break-inside: avoid;
    }

    body {
        background: white;
        color: black;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    header h1 {
        font-size: 2rem;
    }

    .controls-panel {
        gap: 1rem;
    }

    section {
        padding: 1.5rem;
    }

    .character-grid {
        grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    }

    .character-item {
        font-size: 1.2rem;
    }

    .actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .demo-container {
        flex-direction: column;
    }

    #strokeCanvas {
        width: 150px;
        height: 150px;
    }
}

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

.preview-section,
.stroke-order-demo {
    animation: fadeIn 0.5s ease-out;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}