:root {
    --bg-dark: #0f172a;
    --bg-panel: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #334155;
    --success: #10b981;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
}

.generator-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

h2 {
    margin-top: 0;
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.gradient-preview {
    width: 100%;
    height: 250px;
    border-radius: 8px;
    border: 2px solid var(--border);
    margin-bottom: 1rem;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input[type="color"] {
    height: 40px;
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-dark);
    cursor: pointer;
}

input[type="range"],
input[type="number"] {
    width: 100%;
    padding: 8px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-main);
}

input[type="range"] {
    height: 6px;
    padding: 0;
}

select {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
}

select:focus,
input:focus {
    outline: none;
    border-color: var(--accent);
}

.color-stops {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 1rem;
}

.color-stop {
    display: grid;
    grid-template-columns: 60px 1fr 80px 40px;
    gap: 10px;
    align-items: center;
}

.btn-add {
    background: var(--accent);
    border: none;
    color: #fff;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
}

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

.btn-remove {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px;
    border-radius: 4px;
    cursor: pointer;
}

.btn-remove:hover {
    border-color: #ef4444;
    color: #ef4444;
}

.code-output-wrapper {
    position: relative;
}

.code-output {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    padding: 12px;
    padding-right: 70px;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    color: var(--accent);
    word-wrap: break-word;
    min-height: 60px;
}

.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    z-index: 10;
}

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

.presets {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.preset-btn {
    height: 60px;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.preset-btn:hover {
    border-color: var(--accent);
    transform: scale(1.05);
}

.export-tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 1rem;
}

.tab-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
}

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