:root {
    --pay-primary: #0d6efd;
    --pay-primary-dark: #0a58ca;
    --pay-success: #198754;
    --pay-success-dark: #157347;
    --pay-card-bg: #fff;
    --pay-section-bg: #f8fafc;
    --pay-border: #e2e8f0;
    --pay-shadow: 0 1px 3px rgba(0,0,0,.08);
    --pay-shadow-lg: 0 4px 12px rgba(0,0,0,.1);
}

body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }

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

.pay-header {
    background: linear-gradient(135deg, #1e3a5f 0%, #2d5a87 100%);
    color: #fff;
    border-radius: 12px;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--pay-shadow-lg);
}

.pay-header h1 { font-size: 1.75rem; font-weight: 600; margin: 0 0 1rem 0; letter-spacing: -0.02em; color: #fff; }
.pay-lang-switcher { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.pay-lang-switcher .btn {
    padding: 0.35rem 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,.5);
    background: rgba(255,255,255,.15);
    color: #fff;
    transition: all .2s;
}
.pay-lang-switcher .btn:hover,
.pay-lang-switcher .btn:focus {
    background: rgba(255,255,255,.3);
    border-color: rgba(255,255,255,.7);
    color: #fff;
    box-shadow: none;
}

.pay-form-card {
    background: var(--pay-card-bg);
    border-radius: 12px;
    border: 1px solid var(--pay-border);
    box-shadow: var(--pay-shadow);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
}

.pay-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: #334155;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--pay-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pay-section-title i { color: var(--pay-primary); opacity: .9; }

.pay-room-card {
    border: 1px solid var(--pay-border);
    border-radius: 10px;
    overflow: hidden;
    transition: box-shadow .2s, border-color .2s;
}

.pay-room-card:hover { border-color: #cbd5e1; box-shadow: var(--pay-shadow); }

.pay-room-card .card-header {
    background: var(--pay-section-bg);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--pay-border);
}

.pay-room-card .card-body { padding: 1rem; }

.pay-tabs .nav-link {
    font-weight: 500;
    padding: 0.75rem 1.25rem;
    border-radius: 8px 8px 0 0;
    border: 1px solid var(--pay-border);
    background: var(--pay-section-bg);
    color: #64748b;
    margin-right: 0.25rem;
    transition: all .2s;
}

.pay-tabs .nav-link:hover { color: var(--pay-primary); background: #fff; }
.pay-tabs .nav-link.active {
    background: #fff;
    color: var(--pay-primary);
    border-bottom-color: #fff;
    margin-bottom: -1px;
}

.pay-tab-content {
    background: #fff;
    border: 1px solid var(--pay-border);
    border-top: none;
    border-radius: 0 0 8px 8px;
    padding: 1.5rem;
}

.pay-alert-info {
    background: #eff6ff;
    border: 1px solid #93c5fd;
    border-radius: 8px;
    color: #1e40af;
    padding: 1rem 1.25rem;
}

.pay-alert-warning {
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: 8px;
    color: #92400e;
    padding: 1rem 1.25rem;
}

.pay-alert-info i,
.pay-alert-warning i { color: inherit; opacity: 0.9; }

.pay-alert-success {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 1px solid #86efac;
    border-radius: 8px;
    color: #166534;
    padding: 1rem 1.25rem;
}

.pay-alert-danger {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border: 1px solid #fca5a5;
    border-radius: 8px;
    color: #991b1b;
    padding: 1rem 1.25rem;
}

.pay-alert-success i,
.pay-alert-danger i { color: inherit; opacity: 0.9; }

.pay-amount-box {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 1px solid #86efac;
    border-radius: 10px;
    padding: 1rem 1.25rem;
}

.pay-amount-box .form-control {
    font-size: 1.25rem;
    font-weight: 600;
    border: 1px solid #86efac;
    background: #fff;
    color: #166534;
}

.pay-submit-btn {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--pay-success) 0%, var(--pay-success-dark) 100%);
    border: none;
    color: #fff;
    box-shadow: 0 2px 8px rgba(25, 135, 84, .35);
    transition: transform .15s, box-shadow .15s;
}

.pay-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(25, 135, 84, .4);
    background: linear-gradient(135deg, #1d9d5c 0%, #146c43 100%);
    color: #fff;
}

.pay-form-card .form-control:focus,
.pay-form-card .form-select:focus { border-color: var(--pay-primary); box-shadow: 0 0 0 3px rgba(13, 110, 253, .15); }
.pay-form-card .form-label { font-weight: 500; color: #475569; }

footer img { height: 30px; width: auto; }