:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --dark: #1e293b;
    --darker: #0f172a;
    --light: #f8fafc;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --gray: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 100%);
    color: var(--light);
    min-height: 100vh;
    padding: 20px;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    color: var(--accent);
}

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

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

.calculator-card, .results-card {
    background: rgba(30, 41, 59, 0.8);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.card-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.card-header h2 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-header i {
    color: var(--accent);
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--gray);
}

.input-group input, .input-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: var(--darker);
    color: var(--light);
    font-size: 1rem;
}

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

.btn-calculate {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-calculate:hover {
    background: var(--primary-dark);
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.result-box {
    background: rgba(15, 23, 42, 0.6);
    border-radius: 10px;
    padding: 15px;
    text-align: center;
}

.result-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 10px 0;
    color: var(--accent);
}

.result-label {
    color: var(--gray);
    font-size: 0.9rem;
}

.risk-visualization {
    margin-top: 30px;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 10px;
    padding: 20px;
}

.risk-bar {
    height: 20px;
    background: var(--dark);
    border-radius: 10px;
    margin: 15px 0;
    overflow: hidden;
    position: relative;
}

.risk-fill {
    height: 100%;
    width: 35%;
    background: linear-gradient(90deg, var(--success) 0%, var(--accent) 50%, var(--danger) 100%);
    border-radius: 10px;
}

.risk-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--gray);
}

.summary {
    margin-top: 30px;
    padding: 20px;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 10px;
}

.summary h3 {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.premium-banner {
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    border-radius: 10px;
    padding: 20px;
    margin-top: 30px;
    text-align: center;
}

.premium-banner h3 {
    margin-bottom: 10px;
    font-size: 1.4rem;
}

.premium-features {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.feature {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.btn-premium {
    padding: 12px 30px;
    background: white;
    color: #8b5cf6;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.3s;
}

.btn-premium:hover {
    transform: translateY(-3px);
}

footer {
    margin-top: 50px;
    text-align: center;
    padding: 20px;
    color: var(--gray);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}