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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #252542;
    --text-primary: #f0f0ff;
    --text-secondary: #a0a0c0;
    --accent-primary: #8B5CF6;
    --accent-secondary: #EC4899;
    --accent-tertiary: #F472B6;
    --border-color: #3a3a5c;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

#app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: 
        radial-gradient(ellipse at 20% 0%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
        var(--bg-primary);
}

.header {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.1) 0%, transparent 100%);
    border-bottom: 1px solid var(--border-color);
}

.title {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.emoji {
    -webkit-text-fill-color: initial;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

.main-content {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(280px, 400px) 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.section-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.resolution-section,
.presets-section,
.generator-section,
.export-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.dimension-inputs {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
}

.input-group {
    flex: 1;
}

.input-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.dimension-separator {
    font-size: 1.5rem;
    color: var(--text-secondary);
    padding-bottom: 0.5rem;
}

.lock-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

.lock-btn.locked {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--accent-primary);
}

.lock-icon {
    font-size: 1.2rem;
}

.ratio-display {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

#ratio-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.ratio-warning {
    font-size: 0.85rem;
    color: var(--accent-tertiary);
    animation: pulse 2s infinite;
}

.ratio-warning.hidden {
    display: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
}

.preset-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.preset-btn:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.preset-btn.original {
    border-color: var(--accent-secondary);
    background: rgba(236, 72, 153, 0.1);
}

.preset-btn.nice:hover {
    border-color: #84CC16;
}

.preset-label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.preset-name {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.generator-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.control-row label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.control-row select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: 'Space Grotesk', sans-serif;
    cursor: pointer;
    transition: border-color 0.2s;
}

.control-row select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.button-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.action-btn {
    padding: 0.9rem 1.25rem;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.action-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.4);
}

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

.action-btn.secondary:hover {
    border-color: var(--accent-primary);
}

.action-btn.download {
    background: linear-gradient(135deg, #10B981, #059669);
    color: white;
    width: 100%;
}

.action-btn.download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.export-info {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: center;
    background: var(--bg-secondary);
    padding: 0.75rem;
    border-radius: 8px;
}

.preview-area {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.preview-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
    min-height: 300px;
}

.preview-wrapper {
    position: relative;
    border: 3px dashed var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s;
}

#preview-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.dimension-label {
    position: absolute;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.dimension-label.top {
    top: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
}

.dimension-label.side {
    right: -4rem;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
}

.stats-panel {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.stats-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border-color);
}

.stat-item:last-of-type {
    border-bottom: none;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.achievements {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge {
    font-size: 0.75rem;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(236, 72, 153, 0.2));
    border: 1px solid var(--accent-primary);
    padding: 0.4rem 0.75rem;
    border-radius: 20px;
    color: var(--text-primary);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

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

.footer p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.footer a:hover {
    color: var(--accent-secondary);
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    border: 2px solid var(--accent-primary);
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    z-index: 1000;
    animation: slideUp 0.3s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.toast.hidden {
    display: none;
}

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateX(-50%) translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateX(-50%) translateY(0); 
    }
}

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 26, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    z-index: 1001;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

@media (max-width: 600px) {
    .main-content {
        padding: 1rem;
    }
    
    .dimension-inputs {
        flex-wrap: wrap;
    }
    
    .dimension-separator {
        display: none;
    }
    
    .input-group {
        flex: 1 1 40%;
    }
    
    .preset-buttons {
        grid-template-columns: 1fr 1fr;
    }
    
    .button-row {
        grid-template-columns: 1fr;
    }
    
    .dimension-label.side {
        display: none;
    }
}