@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&family=Fira+Code:wght@400;500&family=Space+Mono:wght@400;700&display=swap');

:root {
    --bg-base: #0f0f23;
    --indigo: #6366f1;
    --purple: #8b5cf6;
    --amber: #f59e0b;
    --teal: #14b8a6;
    --rose: #f43f5e;

    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
}

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #1a1a3e 0%, #2d1b4e 50%, #1e3a5f 100%);
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 40px 20px;
}

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

.title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--purple), var(--indigo), var(--teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.editor-panel,
.preview-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.panel-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.preset-select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 8px;
    font-family: 'Space Mono', monospace;
    font-size: 0.85rem;
    cursor: pointer;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-family: 'Space Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--purple), var(--indigo));
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.5);
}

.shader-editor {
    flex: 1;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    resize: none;
    min-height: 500px;
}

.shader-editor:focus {
    outline: none;
    border-color: var(--purple);
}

.error-display {
    margin-top: 12px;
    padding: 12px;
    background: rgba(244, 63, 94, 0.1);
    border: 1px solid var(--rose);
    border-radius: 8px;
    color: var(--rose);
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    display: none;
}

.error-display.show {
    display: block;
}

#glCanvas {
    width: 100%;
    height: 500px;
    background: #000;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 20px;
}

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

.control span {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: 'Space Mono', monospace;
}

.control input[type="range"] {
    width: 100%;
}

.uniforms-info {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.uniforms-info code {
    color: var(--teal);
    font-family: 'Fira Code', monospace;
}

.info-section {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
}

.info-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.uniforms-list {
    display: grid;
    gap: 16px;
}

.uniform-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.uniform-item code {
    font-family: 'Fira Code', monospace;
    color: var(--purple);
    font-size: 0.9rem;
}

.uniform-item span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 1200px) {
    .main-grid {
        grid-template-columns: 1fr;
    }

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