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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

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

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

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}

.calculator-section, .results-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.input-group input[type="number"] {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1.25rem;
    font-weight: 600;
    border: 2px solid var(--border);
    border-radius: 8px;
    transition: border-color 0.2s;
}

.input-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
}

.range-hint, .deploy-hint, .bundle-hint, .fps-hint {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.toggle-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.toggle-btn {
    flex: 1;
    min-width: 100px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    background: var(--card-bg);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.provider-group .toggle-btn {
    min-width: 70px;
    padding: 0.6rem 0.5rem;
    font-size: 0.8rem;
}

.toggle-btn:hover {
    border-color: var(--primary);
}

.toggle-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.toggle-btn .discount {
    display: inline-block;
    background: var(--success);
    color: white;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 0.25rem;
}

.toggle-btn.active .discount {
    background: rgba(255,255,255,0.3);
}

.modules-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.checkbox-label:hover {
    border-color: var(--primary);
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 4px;
    margin-right: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.checkbox-label input:checked + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-label input:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
}

.checkbox-label input:disabled + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
    opacity: 0.7;
}

.module-name {
    flex: 1;
    font-weight: 500;
}

.module-price {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow);
}

.fps-display {
    margin-top: 0.75rem;
    font-size: 1rem;
    font-weight: 500;
}

#fps-value {
    font-size: 1.5rem;
    color: var(--primary);
}

.result-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.result-card.main-result {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-align: center;
    padding: 2rem;
}

.result-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
}

.result-value.small {
    font-size: 1.75rem;
}

.result-value.highlight {
    color: var(--success);
}

.result-period {
    font-size: 0.875rem;
    opacity: 0.8;
}

.result-daily {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    opacity: 0.8;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Breakdown card styles */
.breakdown-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}

.breakdown-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 0.5rem;
}

.breakdown-section {
    margin-bottom: 1.5rem;
}

.breakdown-section:last-child {
    margin-bottom: 0;
}

.breakdown-section h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.breakdown-table {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: rgba(0, 0, 0, 0.02);
    border-radius: 6px;
    font-size: 0.9rem;
}

.breakdown-row.highlight {
    background: rgba(16, 185, 129, 0.1);
    font-weight: 600;
}

.breakdown-row.total {
    background: var(--primary);
    color: white;
    font-weight: 600;
    margin-top: 0.5rem;
}

.breakdown-row .label {
    color: var(--text-muted);
}

.breakdown-row .value {
    font-weight: 500;
    color: var(--text);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
}

.breakdown-row.total .label,
.breakdown-row.total .value {
    color: white;
}

.breakdown-row .formula {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
}

.infrastructure-card, .comparison-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.infrastructure-card h3, .comparison-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text);
}

.infra-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.infra-item {
    display: flex;
    flex-direction: column;
}

.infra-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.infra-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
}

.margin-info {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.comparison-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.comparison-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-radius: 8px;
    background: var(--bg);
}

.comparison-item.cheaper {
    background: rgba(16, 185, 129, 0.1);
}

.comparison-item.expensive {
    background: rgba(239, 68, 68, 0.1);
}

.competitor-name {
    font-weight: 500;
}

.competitor-price {
    font-weight: 600;
}

.competitor-diff {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.comparison-item.cheaper .competitor-diff {
    background: var(--success);
    color: white;
}

.comparison-item.expensive .competitor-diff {
    background: var(--danger);
    color: white;
}

footer {
    margin-top: 3rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 1.75rem;
    }
    
    .result-value {
        font-size: 2rem;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .infra-grid {
        grid-template-columns: 1fr;
    }
}