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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #0f172a;
    --bg-light: #1e293b;
    --bg-lighter: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: var(--bg-light);
    padding: 1rem 2rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.balance {
    background: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
}

/* Main content */
.main-content {
    padding: 2rem;
}

/* Alert */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0.5rem;
    animation: slideDown 0.3s ease;
}

.alert.success {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert.error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--danger);
    color: var(--danger);
}

@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Auth page */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-box {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.auth-box h2 {
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary);
}

.auth-toggle {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
}

.auth-toggle a {
    color: var(--primary);
    text-decoration: none;
    margin-left: 0.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text);
    font-size: 1rem;
}

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

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

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

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

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 1rem;
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.card-header h3 {
    font-size: 1.2rem;
    color: var(--text);
}

.card-body {
    padding: 1.5rem;
}

.big-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
}

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

.table thead {
    background: var(--bg);
}

.table th {
    padding: 1rem;
    text-align: left;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
}

.table td {
    padding: 1rem;
    border-top: 1px solid var(--border);
}

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

.text-center {
    text-align: center;
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 2rem;
}

.filter-controls select {
    padding: 0.5rem 1rem;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    color: var(--text);
    cursor: pointer;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    width: 90%;
    max-width: 500px;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-close:hover {
    color: var(--text);
}

.modal-content h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

/* Key display */
.key-display {
    background: var(--bg);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    margin-top: 1rem;
}

.key-display code {
    display: block;
    color: var(--success);
    font-size: 0.9rem;
    word-break: break-all;
    margin-bottom: 1rem;
}

/* Status badges */
.status-pending {
    color: var(--warning);
}

.status-succeeded {
    color: var(--success);
}

.status-canceled {
    color: var(--danger);
}

/* Dashboard specific */
.dashboard h2 {
    margin-bottom: 2rem;
    font-size: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .page-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .table {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }
}