/* ==========================================================================
   SchoolGrid Design System — brand tokens
   ========================================================================== */
:root {
    --sg-blue: #0089d0;
    --sg-blue-dark: #006daa;
    --sg-green: #8cc63f;
    --sg-green-dark: #6fa82e;
    --sg-teal: #2bb673;
    --sg-sky: #6dcff6;
    --sg-navy: #0b192e;
    --sg-navy-soft: #132238;
    --sg-surface: #f4f7fb;
    --sg-surface-elevated: #ffffff;
    --sg-border: #e2e8f0;
    --sg-text: #1a2b3c;
    --sg-text-muted: #5a6a7a;
    --sg-sidebar-width: 268px;
    --sg-radius: 0.75rem;
    --sg-radius-lg: 1rem;
    --sg-shadow: 0 4px 24px rgba(11, 25, 46, 0.08);
    --sg-shadow-lg: 0 12px 40px rgba(11, 25, 46, 0.12);
    --sg-font: 'Poppins', system-ui, -apple-system, 'Segoe UI', sans-serif;

    /* Bootstrap overrides */
    --bs-primary: var(--sg-blue);
    --bs-primary-rgb: 0, 137, 208;
    --bs-success: var(--sg-green);
    --bs-success-rgb: 140, 198, 63;
    --bs-body-font-family: var(--sg-font);
    --bs-border-radius: var(--sg-radius);
    --bs-link-color: var(--sg-blue);
    --bs-link-hover-color: var(--sg-blue-dark);
}

[data-bs-theme='dark'] {
    --sg-surface: #0f1a2a;
    --sg-surface-elevated: #132238;
    --sg-border: #243044;
    --sg-text: #e8eef5;
    --sg-text-muted: #94a3b8;
    --bs-body-bg: var(--sg-navy);
    --bs-body-color: var(--sg-text);
}

[x-cloak] {
    display: none !important;
}

/* ==========================================================================
   Base
   ========================================================================== */
body.sg-auth-body,
body.sg-admin-body {
    font-family: var(--sg-font);
    color: var(--sg-text);
    -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Logo component (mark SVG + HTML wordmark — reliable across browsers)
   ========================================================================== */
.sg-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none !important;
    line-height: 1.1;
    color: inherit;
}

.sg-logo--auth {
    justify-content: center;
    gap: 0.85rem;
}

.sg-logo__mark {
    flex-shrink: 0;
    display: block;
}

.sg-logo__text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.sg-logo--auth .sg-logo__text {
    align-items: flex-start;
}

.sg-logo__wordmark {
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.15;
    white-space: nowrap;
}

.sg-logo__tagline {
    margin-top: 0.2rem;
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--sg-text-muted);
}

.sg-logo__tagline--sidebar {
    font-size: 0.55rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    margin-top: 0.15rem;
}

.sg-logo__text--light .sg-text-school {
    color: #ffffff;
}

.sg-logo--compact .sg-logo__mark {
    flex-shrink: 0;
}

.sg-logo__compact-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.sg-text-school {
    color: var(--sg-blue);
}

.sg-text-grid {
    color: var(--sg-green);
}

.sg-logo__img--raster {
    max-width: min(100%, 300px);
    height: auto;
}

@media (max-width: 400px) {
    .sg-logo--auth {
        flex-direction: column;
        gap: 0.5rem;
    }

    .sg-logo--auth .sg-logo__text {
        align-items: center;
        text-align: center;
    }

    .sg-logo__wordmark {
        font-size: 1.35rem;
    }
}

/* ==========================================================================
   Auth layout
   ========================================================================== */
.sg-auth-body {
    background: var(--sg-surface);
    background-image:
        radial-gradient(ellipse 80% 50% at 10% 0%, rgba(0, 137, 208, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 90% 100%, rgba(140, 198, 63, 0.14), transparent);
    min-height: 100vh;
}

.sg-auth-panel {
    position: relative;
}

.sg-auth-panel::before {
    content: '';
    position: absolute;
    inset: -1rem -1rem auto;
    height: 4px;
    border-radius: 4px 4px 0 0;
    background: linear-gradient(90deg, var(--sg-blue), var(--sg-green));
}

.sg-card {
    border-radius: var(--sg-radius-lg);
    border: 1px solid var(--sg-border);
    box-shadow: var(--sg-shadow-lg);
    background: var(--sg-surface-elevated);
}

.sg-btn-primary {
    background: linear-gradient(135deg, var(--sg-blue) 0%, var(--sg-blue-dark) 100%);
    border: none;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.65rem 1.25rem;
    box-shadow: 0 4px 14px rgba(0, 137, 208, 0.35);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.sg-btn-primary:hover,
.sg-btn-primary:focus {
    background: linear-gradient(135deg, var(--sg-blue-dark) 0%, #005580 100%);
    box-shadow: 0 6px 20px rgba(0, 137, 208, 0.45);
    transform: translateY(-1px);
}

.form-control:focus {
    border-color: var(--sg-blue);
    box-shadow: 0 0 0 0.2rem rgba(0, 137, 208, 0.2);
}

.sg-auth-footer {
    font-size: 0.75rem;
    color: var(--sg-text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

/* ==========================================================================
   Admin layout
   ========================================================================== */
.sg-admin-body {
    background: var(--sg-surface);
}

.sg-sidebar {
    width: var(--sg-sidebar-width);
    min-height: 100vh;
    background: linear-gradient(180deg, var(--sg-navy) 0%, var(--sg-navy-soft) 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    transition: width 0.22s ease, transform 0.22s ease;
    flex-shrink: 0;
}

.sg-sidebar.collapsed {
    width: 76px;
}

.sg-sidebar.collapsed .sg-logo__text,
.sg-sidebar.collapsed .sg-sidebar-tagline,
.sg-sidebar.collapsed .nav-link span {
    display: none;
}

.sg-sidebar.collapsed .sg-logo--compact {
    display: inline-flex !important;
    margin: 0 auto;
}

.sg-sidebar-brand {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1rem 1rem 0.85rem !important;
}

.sg-sidebar-tagline {
    font-size: 0.65rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 0.35rem;
}

.sg-sidebar .nav-link {
    border-radius: var(--sg-radius);
    margin-bottom: 0.2rem;
    padding: 0.7rem 0.9rem;
    color: rgba(255, 255, 255, 0.65) !important;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background 0.15s ease, color 0.15s ease;
}

.sg-sidebar .nav-link i {
    font-size: 1.1rem;
    opacity: 0.85;
}

.sg-sidebar .nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff !important;
}

.sg-sidebar .nav-link.active {
    background: rgba(0, 137, 208, 0.25);
    color: #fff !important;
    box-shadow: inset 3px 0 0 var(--sg-green);
}

.sg-topbar {
    min-height: 64px;
    background: var(--sg-surface-elevated) !important;
    border-bottom: 1px solid var(--sg-border) !important;
    box-shadow: 0 1px 0 rgba(11, 25, 46, 0.04);
}

.sg-topbar .sg-logo--compact {
    display: none;
}

.sg-topbar-title {
    font-weight: 600;
    color: var(--sg-text);
}

.sg-user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sg-blue), var(--sg-teal));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.sg-content {
    background: var(--sg-surface);
}

/* Stat cards */
.sg-stat-card {
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-lg);
    border-left: 4px solid var(--sg-green);
    background: var(--sg-surface-elevated);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.sg-stat-card:hover {
    box-shadow: var(--sg-shadow);
    transform: translateY(-2px);
}

.sg-stat-card--blue {
    border-left-color: var(--sg-blue);
}

.sg-stat-card--teal {
    border-left-color: var(--sg-teal);
}

.sg-stat-card__icon {
    width: 44px;
    height: 44px;
    border-radius: var(--sg-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.sg-stat-card__icon--blue {
    background: rgba(0, 137, 208, 0.12);
    color: var(--sg-blue);
}

.sg-stat-card__icon--green {
    background: rgba(140, 198, 63, 0.15);
    color: var(--sg-green-dark);
}

.sg-stat-card__icon--teal {
    background: rgba(43, 182, 115, 0.12);
    color: var(--sg-teal);
}

.sg-page-header {
    margin-bottom: 1.5rem;
}

.sg-page-header h1 {
    font-weight: 700;
    font-size: 1.35rem;
    margin-bottom: 0.25rem;
}

.sg-badge-phase {
    font-weight: 600;
    letter-spacing: 0.03em;
}

.sg-card-panel {
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-lg);
    background: var(--sg-surface-elevated);
    box-shadow: var(--sg-shadow);
}

/* Alerts branded */
.alert-success {
    background: rgba(140, 198, 63, 0.12);
    border-color: rgba(140, 198, 63, 0.35);
    color: var(--sg-green-dark);
}

/* Dark mode auth */
[data-bs-theme='dark'] .sg-auth-body {
    background-image:
        radial-gradient(ellipse 80% 50% at 10% 0%, rgba(0, 137, 208, 0.18), transparent),
        radial-gradient(ellipse 60% 40% at 90% 100%, rgba(140, 198, 63, 0.1), transparent);
}

/* Responsive */
@media (max-width: 991.98px) {
    .sg-sidebar {
        position: fixed;
        z-index: 1040;
        transform: translateX(-100%);
        box-shadow: var(--sg-shadow-lg);
    }

    .sg-sidebar:not(.collapsed) {
        transform: translateX(0);
    }

    .sg-topbar .sg-logo--compact {
        display: inline-flex;
    }
}