:root {
    --brand: #0f4c81;
    --brand-dark: #0a3255;
    --surface: #f3f6fb;
    --card: #ffffff;
    --text: #1d2a3a;
    --muted: #6d7784;
    --border: #d7dee8;
    --danger-bg: #fff0f0;
    --success-bg: #f1fbf5;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    font-family: 'Vazirmatn';
    background: radial-gradient(circle at top right, #edf4ff, #f8fbff 40%, #eef2f8 100%);
    color: var(--text);
}
a { text-decoration: none; }
.app-shell { min-height: 100vh; }
.app-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid var(--border);
}
.navbar-brand { color: var(--brand); font-weight: 700; letter-spacing: .4px; }
.nav-link {
    color: var(--text);
    border-radius: 8px;
    padding: .45rem .75rem;
}
.nav-link:hover, .nav-link:focus, .nav-link.active { background: #eaf2fd; color: var(--brand-dark); }
.user-chip {
    background: #eaf2fd;
    color: var(--brand-dark);
    padding: .35rem .75rem;
    border-radius: 999px;
    font-size: .85rem;
}
.app-main { max-width: 1440px; }
.page-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: 0 10px 24px rgba(27, 42, 71, .06);
}
.form-card { max-width: 1100px; margin: 0 auto; }
.dashboard-stat {
    background: linear-gradient(135deg, #f7fbff, #edf4ff);
    border: 1px solid #d8e7fb;
    border-radius: 14px;
    padding: 1rem;
    min-height: 110px;
}
.dashboard-stat h2 { margin: 0; color: var(--brand-dark); font-weight: 800; }
.dashboard-stat p { margin: .55rem 0 0; color: var(--muted); }
.quick-links { display: flex; gap: .75rem; flex-wrap: wrap; }
.quick-link {
    padding: .6rem .9rem;
    border-radius: 10px;
    background: #f7faff;
    border: 1px solid #d9e5f6;
    color: var(--brand-dark);
    transition: all .2s ease;
}
.quick-link:hover { background: #eaf2ff; transform: translateY(-1px); }
.form-control, .form-select {
    border-radius: 10px;
    border-color: #ced6e0;
    min-height: 44px;
}
.form-control:focus, .form-select:focus {
    border-color: #8ab6ea;
    box-shadow: 0 0 0 .2rem rgba(15, 76, 129, .16);
}
.btn-primary {
    --bs-btn-bg: var(--brand);
    --bs-btn-border-color: var(--brand);
    --bs-btn-hover-bg: var(--brand-dark);
    --bs-btn-hover-border-color: var(--brand-dark);
    --bs-btn-active-bg: var(--brand-dark);
    --bs-btn-active-border-color: var(--brand-dark);
}
.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: linear-gradient(140deg, #dce9f9, #f6f9ff 50%, #e9eef6);
}
.auth-card {
    width: 100%;
    max-width: 460px;
    background: white;
    border-radius: 20px;
    border: 1px solid #d4e0f0;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(13, 35, 66, .12);
}
.auth-title { margin: 0; font-size: 1.35rem; font-weight: 800; color: var(--brand-dark); }
.auth-subtitle { color: var(--muted); margin: .7rem 0 0; }
.text-danger { font-size: .88rem; }
.table { --bs-table-striped-bg: #f7fafe; }
.section-title { color: var(--brand-dark); font-weight: 800; }
.small-grid > div { margin-bottom: .55rem; }
.timeline-list { display: grid; gap: .75rem; }
.timeline-item {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: .75rem;
    background: #fafcff;
}
.monitoring-table .monitor-up { background: var(--success-bg); }
.monitoring-table .monitor-down { background: var(--danger-bg); }
.history-item { margin-bottom: .5rem; }
code {
    background: #eef5ff;
    border-radius: 6px;
    padding: .15rem .35rem;
}
pre {
    background: #0f172a;
    color: #e2e8f0;
    padding: .75rem;
    border-radius: 12px;
    white-space: pre-wrap;
    word-break: break-word;
}
@media (max-width: 991px) {
    .app-main { padding: 1rem; }
    .page-card { padding: 1rem; }
}