/**
 * Kanji Heatmap - Modern Clean Styling
 * Distinct from woodpug.net's space theme
 */

:root {
    /* Primary colors */
    --primary-bg: #f8f9fa;
    --primary-text: #212529;
    --secondary-text: #6c757d;
    --accent-blue: #4a90e2;
    --accent-green: #2ecc71;
    --accent-red: #e74c3c;

    /* UI elements */
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-bg: #1a1a1a;
        --primary-text: #f8f9fa;
        --secondary-text: #adb5bd;
        --border-color: #343a40;
        --card-bg: #2d2d2d;
    }
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
    padding: 20px;
}

/* Main container */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--primary-text);
}

.header p {
    color: var(--secondary-text);
    font-size: 0.9rem;
}

/* Stats bar */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 45px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--secondary-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 3px;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-blue);
    min-height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Controls */
.controls {
    padding: 12px 0;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-group label {
    font-weight: 600;
    color: var(--secondary-text);
}

.control-group select,
.control-group button {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--card-bg);
    color: var(--primary-text);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-group select:hover {
    border-color: var(--accent-blue);
}

/* Color key */
.color-key {
    background: var(--card-bg);
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    text-align: center;
}

.color-key h3 {
    font-size: 0.75rem;
    color: var(--secondary-text);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.color-gradient {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.color-sample {
    width: 24px;
    height: 24px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.gradient-label {
    font-size: 0.75rem;
    color: var(--secondary-text);
    font-weight: 600;
}

/* Inline color key */
.color-key-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* Grid sections */
.kanji-section {
    margin-bottom: 30px;
}

.section-header {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin: 20px 0 5px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
    user-select: none;
    transition: color var(--transition-fast);
    cursor: pointer;
}

.section-header:hover {
    color: var(--secondary-text);
}

.section-header:first-of-type {
    margin-top: 0;
}

.collapse-icon {
    display: inline-block;
    width: 20px;
    font-size: 0.8em;
    transition: transform var(--transition-fast);
}

.section-subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--accent-blue);
    margin: 5px 0 15px 0;
    text-align: center;
}

/* Kanji grid */
.kanji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 4px;
    margin-bottom: 30px;
    transition: all var(--transition-normal);
    max-height: none;
    overflow: visible;
}

.kanji-grid.collapsed {
    max-height: 0;
    overflow: hidden;
    margin-bottom: 0;
}

/* Kanji tiles */
.kanji-tile {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform var(--transition-fast),
                box-shadow var(--transition-fast);
    position: relative;
    overflow: visible;
}

.kanji-tile:hover {
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.kanji-link {
    font-size: 24px;
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic Pro', 'ヒラギノ角ゴ Pro W3', 'メイリオ', Meiryo, sans-serif;
    color: #000;
    text-decoration: none;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.kanji-link:visited {
    color: #000;
}

/* Tooltip */
.kanji-tile::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 1000;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.kanji-tile:hover::after {
    opacity: 1;
}

/* Setup wizard */
.setup-wizard {
    max-width: 600px;
    margin: 50px auto;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.setup-wizard h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-text);
}

.setup-step {
    margin-bottom: 25px;
}

.setup-step label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-text);
}

.setup-step input,
.setup-step select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--card-bg);
    color: var(--primary-text);
    font-size: 1rem;
}

.setup-step .radio-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.setup-step .radio-option {
    display: flex;
    align-items: center;
    gap: 8px;
}

.setup-step .radio-option input[type="radio"] {
    width: auto;
}

.setup-step a {
    color: #0066cc;
    text-decoration: underline;
}

.setup-step a:hover {
    color: #004499;
}

.setup-step code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.setup-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover:not(:disabled) {
    background: #357abd;
}

.btn-secondary {
    background: var(--border-color);
    color: var(--primary-text);
}

.btn-secondary:hover:not(:disabled) {
    background: #adb5bd;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Icon buttons */
.btn-icon {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    color: var(--primary-text);
    font-weight: normal;
    min-width: fit-content;
    white-space: nowrap;
}

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

.btn-icon:active {
    background: var(--border-color);
}

/* Loading state */
.loading {
    text-align: center;
    padding: 60px 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    font-size: 1.1rem;
    color: var(--secondary-text);
}

.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    margin: 20px auto;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-blue);
    transition: width var(--transition-normal);
}

/* Error states */
.error-message {
    background: #fee;
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.error-message h3 {
    margin-bottom: 10px;
}

.error-message ul {
    margin-left: 20px;
}

/* Settings panel */
.settings-panel {
    position: fixed;
    right: -450px;
    top: 0;
    height: 100vh;
    width: 450px;
    background: var(--card-bg);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.2);
    transition: right var(--transition-normal);
    z-index: 1000;
    overflow-y: auto;
    padding: 30px;
}

.settings-panel.open {
    right: 0;
}

.settings-panel h2 {
    margin-bottom: 20px;
}

.settings-section {
    margin-bottom: 30px;
}

.settings-section h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--secondary-text);
}

.settings-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.settings-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .kanji-grid {
        grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
        gap: 2px;
    }

    .kanji-link {
        font-size: 18px;
    }

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

    .control-group {
        flex-direction: column;
        align-items: stretch;
    }

    .settings-panel {
        width: 100%;
        right: -100%;
    }

    .kanji-tile::after {
        font-size: 9px;
        padding: 6px 8px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .kanji-grid {
        grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
    }

    .kanji-link {
        font-size: 20px;
    }
}

/* Utility classes */
.hidden {
    display: none !important;
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* Missing kanji dropdown */
.missing-kanji-details {
    margin: 15px 0 20px 0;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
}

.missing-kanji-summary {
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    color: var(--secondary-text);
    transition: all var(--transition-fast);
    list-style: none;
}

.missing-kanji-summary::-webkit-details-marker {
    display: none;
}

.missing-kanji-summary::before {
    content: '▶';
    display: inline-block;
    margin-right: 8px;
    transition: transform var(--transition-fast);
}

.missing-kanji-details[open] .missing-kanji-summary::before {
    transform: rotate(90deg);
}

.missing-kanji-summary:hover {
    color: var(--primary-text);
    background: var(--bg-color);
}

.missing-kanji-grid {
    padding: 12px;
    margin-bottom: 0;
}

.missing-kanji-tile {
    opacity: 0.6;
}

.missing-kanji-tile .kanji-link {
    color: var(--secondary-text);
}

.missing-kanji-tile::after {
    display: none !important;
}