/* CSS Variables for theming */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-color: #e94560;
    --accent-hover: #ff6b6b;
    --border-color: #2a2a4a;
    --card-bg: #1e1e3f;
    --code-bg: #0d1117;
    --success-color: #4ade80;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e0e0e0;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-color: #e94560;
    --accent-hover: #d63850;
    --border-color: #d0d0d0;
    --card-bg: #ffffff;
    --code-bg: #f6f8fa;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.logo-img {
    width: 48px;
    height: 48px;
    border-radius: 8px;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
}

/* Controls Section */
.controls-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.control-group select,
.control-group textarea {
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.control-group select:focus,
.control-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.control-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.control-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    appearance: none;
    cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: transform 0.2s;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.custom-text-group {
    grid-column: 1 / -1;
}

/* Font Library Section */
.font-library-section {
    margin-bottom: 2rem;
}

.font-library-section h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.font-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.category-btn {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.category-btn:hover {
    border-color: var(--accent-color);
}

.category-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.font-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.font-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.25rem;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.font-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.font-card.selected {
    border-color: var(--success-color);
    background: rgba(74, 222, 128, 0.1);
}

.font-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.font-name {
    font-size: 1.1rem;
    font-weight: 600;
}

.font-badges {
    display: flex;
    gap: 0.25rem;
}

.badge {
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
}

.badge-free {
    background: rgba(74, 222, 128, 0.2);
    color: var(--success-color);
}

.badge-paid {
    background: rgba(233, 69, 96, 0.2);
    color: var(--accent-color);
}

.badge-ligatures {
    background: rgba(96, 165, 250, 0.2);
    color: #60a5fa;
}

.font-preview {
    padding: 0.75rem;
    background: var(--code-bg);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.4;
    overflow: hidden;
    white-space: pre;
    color: var(--text-primary);
}

.font-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.font-action-btn {
    flex: 1;
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

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

.font-action-btn.download-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

/* Comparison Section */
.comparison-section {
    margin-bottom: 2rem;
}

.comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.comparison-header h2 {
    font-size: 1.5rem;
}

.clear-btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.clear-btn:hover {
    background: var(--accent-color);
    color: white;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    background: var(--card-bg);
    border-radius: 12px;
    border: 2px dashed var(--border-color);
    color: var(--text-secondary);
}

.comparison-panel {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.panel-font-name {
    font-weight: 600;
    font-size: 1rem;
}

.panel-remove-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: rgba(233, 69, 96, 0.2);
    color: var(--accent-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.panel-remove-btn:hover {
    background: var(--accent-color);
    color: white;
}

.panel-code {
    padding: 1.25rem;
    background: var(--code-bg);
    overflow-x: auto;
    white-space: pre;
    line-height: 1.5;
    min-height: 200px;
}

/* Footer Styles */
.footer {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

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

.footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 1rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: var(--success-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .logo-img {
        width: 36px;
        height: 36px;
    }

    .tagline {
        font-size: 0.95rem;
    }

    .controls-section {
        grid-template-columns: 1fr;
    }

    .font-grid {
        grid-template-columns: 1fr;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .comparison-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .font-categories {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
    }

    .category-btn {
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 1rem 0.75rem;
    }

    .font-card {
        padding: 1rem;
    }

    .panel-code {
        padding: 1rem;
        font-size: 12px;
    }

    .font-action-btn {
        padding: 0.4rem;
        font-size: 0.8rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Code syntax highlighting colors (for dark theme) */
.panel-code .keyword { color: #ff79c6; }
.panel-code .string { color: #f1fa8c; }
.panel-code .comment { color: #6272a4; }
.panel-code .function { color: #50fa7b; }
.panel-code .number { color: #bd93f9; }

[data-theme="light"] .panel-code .keyword { color: #d73a49; }
[data-theme="light"] .panel-code .string { color: #032f62; }
[data-theme="light"] .panel-code .comment { color: #6a737d; }
[data-theme="light"] .panel-code .function { color: #6f42c1; }
[data-theme="light"] .panel-code .number { color: #005cc5; }