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

:root {
    --primary: #d4af37;
    --primary-dark: #b8962e;
    --primary-light: #e8c547;
    --bg-dark: #1a1a1a;
    --bg-card: #242424;
    --bg-input: #2a2a2a;
    --text-main: #ffffff;
    --text-muted: #888888;
    --success: #4caf50;
    --danger: #f44336;
    --border: #333333;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.login-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    font-size: 28px;
    color: var(--primary);
    letter-spacing: 2px;
}

.logo p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 5px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-group input::placeholder {
    color: #555;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    background: var(--primary);
    color: var(--bg-dark);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #43a047; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #e53935; }
.btn-secondary { background: var(--bg-input); color: var(--text-main); }
.btn-secondary:hover { background: var(--border); }

.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

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

.header h1 {
    font-size: 24px;
    color: var(--primary);
}

.header-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-user span {
    color: var(--text-muted);
    font-size: 14px;
}

.nav-menu {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.nav-menu a {
    padding: 12px 24px;
    background: var(--bg-card);
    color: var(--text-main);
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--primary);
    color: var(--bg-dark);
}

.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    font-size: 20px;
    color: var(--text-main);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
}

.table tr:hover {
    background: var(--bg-input);
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: rgba(76, 175, 80, 0.2);
    color: var(--success);
}

.badge-danger {
    background: rgba(244, 67, 54, 0.2);
    color: var(--danger);
}

.badge-master {
    background: rgba(212, 175, 55, 0.2);
    color: var(--primary);
}

.badge-pro {
    background: rgba(33, 150, 243, 0.2);
    color: #2196f3;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-input);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-item:hover {
    background: var(--border);
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
}

.checkbox-item label {
    cursor: pointer;
    flex: 1;
}

.checkbox-item .price {
    color: var(--primary);
    font-weight: 600;
}

.result-hero {
    text-align: center;
    padding: 60px 20px;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.result-hero .product-name {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.result-hero .price-main {
    font-size: 64px;
    color: var(--primary);
    font-weight: 700;
    margin: 20px 0;
}

.result-hero .installment {
    font-size: 28px;
    color: var(--text-main);
    margin-top: 20px;
}

.result-hero .installment span {
    color: var(--primary);
    font-weight: 700;
}

.result-hero .subtitle {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 10px;
}

.actions {
    display: flex;
    gap: 15px;
    margin-top: 40px;
}

.actions .btn {
    padding: 16px 40px;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h2 {
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.stats-card {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
}

.stats-card .value {
    font-size: 32px;
    color: var(--primary);
    font-weight: 700;
}

.stats-card .label {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 5px;
}

.empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
    }
    
    .result-hero .price-main {
        font-size: 42px;
    }
    
    .result-hero .installment {
        font-size: 20px;
    }
}