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

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: #1e1e36;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b8;
    --text-muted: #6c6c80;
    --accent: #6c63ff;
    --accent-hover: #5a52e0;
    --accent-glow: rgba(108, 99, 255, 0.3);
    --border: #2a2a45;
    --success: #4ecdc4;
    --warning: #ffd93d;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(108, 99, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(78, 205, 196, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(255, 217, 61, 0.04) 0%, transparent 50%);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px 60px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 48px;
}

header h1 {
    font-size: 2.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, #6c63ff, #4ecdc4, #ffd93d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Controls */
.controls {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.color-input-group {
    margin-bottom: 28px;
}

.color-input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    width: 56px;
    height: 56px;
    border: 3px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 2px;
    background: var(--bg-tertiary);
    transition: var(--transition);
}

input[type="color"]:hover {
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

#hexInput {
    flex: 1;
    max-width: 200px;
    height: 56px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.2rem;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    padding: 0 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

#hexInput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

/* Palette Type Selector */
.palette-type-selector {
    margin-bottom: 28px;
}

.palette-type-selector label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.type-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.type-btn {
    padding: 10px 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.type-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: rgba(108, 99, 255, 0.1);
}

.type-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 2px 12px var(--accent-glow);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 12px;
}

.action-btn {
    flex: 1;
    padding: 14px 24px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-color: transparent;
    color: #fff;
}

.action-btn.primary:hover {
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* Palette Container */
.palette-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.palette-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.palette-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.export-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.export-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.export-btn:hover {
    border-color: var(--success);
    color: var(--success);
    background: rgba(78, 205, 196, 0.1);
}

/* Palette Display */
.palette-display {
    display: flex;
    gap: 12px;
    min-height: 200px;
}

.color-card {
    flex: 1;
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.color-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 2;
}

.color-card.locked {
    border-color: var(--warning);
}

.color-info {
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.color-hex {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.5px;
}

.lock-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    opacity: 0;
}

.color-card:hover .lock-btn,
.color-card.locked .lock-btn {
    opacity: 1;
}

.lock-btn:hover {
    background: rgba(0, 0, 0, 0.6);
    transform: scale(1.1);
}

.color-card.locked .lock-btn {
    background: rgba(255, 217, 61, 0.3);
    color: var(--warning);
}

.copy-hint {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Info Section */
.info-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 32px;
    box-shadow: var(--shadow);
}

.info-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.info-section ul {
    list-style: none;
    padding: 0;
}

.info-section li {
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    position: relative;
    padding-left: 20px;
}

.info-section li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    pointer-events: none;
}

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

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

/* Modal for export */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 16px 64px rgba(0, 0, 0, 0.6);
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.show .modal {
    transform: scale(1);
}

.modal h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.modal pre {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 20px;
    overflow-x: auto;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.modal-btn {
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.modal-btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.modal-btn.primary:hover {
    background: var(--accent-hover);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 24px 16px 40px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .controls {
        padding: 20px;
    }

    .type-buttons {
        gap: 6px;
    }

    .type-btn {
        padding: 8px 14px;
        font-size: 0.82rem;
    }

    .action-buttons {
        flex-direction: column;
    }

    .palette-display {
        flex-wrap: wrap;
    }

    .color-card {
        flex: 1 1 calc(50% - 6px);
        min-height: 160px;
    }

    .palette-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .export-buttons {
        width: 100%;
    }

    .export-btn {
        flex: 1;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .color-card {
        flex: 1 1 100%;
        min-height: 120px;
    }

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

    input[type="color"] {
        width: 100%;
        height: 48px;
    }

    #hexInput {
        max-width: 100%;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

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

/* Animation for color generation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.color-card {
    animation: fadeInUp 0.4s ease forwards;
}

.color-card:nth-child(1) { animation-delay: 0.05s; }
.color-card:nth-child(2) { animation-delay: 0.1s; }
.color-card:nth-child(3) { animation-delay: 0.15s; }
.color-card:nth-child(4) { animation-delay: 0.2s; }
.color-card:nth-child(5) { animation-delay: 0.25s; }