:root {
    --bg-color: #121418;
    --panel-bg: #1c1f26;
    --panel-border: #2d333f;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-primary: #FFB300;
    --accent-hover: #ffca28;
    --accent-secondary: #00E5FF;
    --danger: #ef4444;
    --font-mono: 'ui-monospace', 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    padding-bottom: 2rem;
}

header {
    text-align: center;
    padding: 2rem 1rem;
    background-color: #0b0c0f;
    border-bottom: 1px solid var(--panel-border);
}

header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: 1px;
    margin-top: 0.25rem;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1rem;
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .container {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
    
    .results-panel {
        grid-row: span 2;
    }
}

/* Ad Placeholders */
.ad-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #1a1a1a;
    border: 2px dashed #444;
    color: #666;
    font-size: 0.8rem;
    text-transform: uppercase;
    margin: 1rem auto;
}

.ad-desktop {
    display: none;
    width: 728px;
    height: 90px;
}

.ad-mobile {
    width: 320px;
    height: 50px;
}

@media (min-width: 768px) {
    .ad-desktop {
        display: flex;
    }
    .ad-mobile {
        display: none;
    }
}

/* Panels */
section {
    background-color: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.section-header h2 {
    font-size: 1.25rem;
    color: #fff;
    margin-bottom: 1.25rem;
    border-bottom: 2px solid var(--panel-border);
    padding-bottom: 0.5rem;
}

/* Presets */
.presets {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.preset-btn {
    background-color: #2a2f3a;
    color: var(--text-primary);
    border: 1px solid var(--panel-border);
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background-color: #353b47;
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Form */
.input-group {
    margin-bottom: 1.25rem;
}

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

.input-group input {
    width: 100%;
    background-color: #0b0c0f;
    border: 1px solid var(--panel-border);
    color: var(--accent-primary);
    padding: 0.75rem;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    border-radius: 4px;
    outline: none;
}

.input-group input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(255, 179, 0, 0.2);
}

.help-text {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Outputs */
.output-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.output-card {
    background-color: #0b0c0f;
    border: 1px solid var(--panel-border);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
}

.output-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.output-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.output-sub {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 0.25rem;
}

/* SVG Blueprint */
.visualization-container {
    background-color: #0b0c0f;
    border: 1px solid #1e293b;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.visualization-container h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.5rem 1rem;
    background-color: #1e293b;
    color: var(--accent-secondary);
    border-bottom: 1px solid #0f172a;
    margin: 0;
}

.svg-wrapper {
    width: 100%;
    padding: 1rem;
    display: flex;
    justify-content: center;
    background-image: 
        linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

svg {
    width: 100%;
    max-width: 400px;
    height: auto;
    font-family: var(--font-mono);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}