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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a24;
    --border-color: #2a2a3a;
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --accent: #6366f1;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

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

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--accent);
    border-radius: 2px;
}

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

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input,
select {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.result-item {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, border-color 0.2s;
}

.result-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.result-item.total {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(168, 85, 247, 0.15));
    border-color: var(--accent);
}

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

.result-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.result-unit {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.formula-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.formula {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1rem;
    font-family: 'SF Mono', 'Monaco', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    overflow-x: auto;
}

.formula-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.gpu-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.gpu-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.gpu-dot.green {
    background: var(--success);
}

.gpu-dot.yellow {
    background: var(--warning);
}

.gpu-dot.red {
    background: var(--danger);
}

@keyframes pulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.gpu-text {
    font-size: 0.9rem;
}

.info-tip {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

@media (max-width: 600px) {
    .results-grid {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 1.75rem;
    }
}