/* assets/css/admin.css - Modern, Clean Styling for Super Admin & Institute Admin */

:root {
    --primary: #8b0000;
    --primary-hover: #6e0000;
    --primary-light: #fef2f2;
    --secondary: #0f766e;
    --secondary-hover: #115e59;
    --dark-bg: #0f172a;
    --dark-sidebar: #1e293b;
    --body-bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--body-bg);
    color: var(--text-main);
    min-height: 100vh;
}

/* Layout */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    background-color: var(--dark-sidebar);
    color: #f8fafc;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-brand {
    padding: 20px;
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    gap: 10px;
    background: #0f172a;
}

.sidebar-badge {
    font-size: 10px;
    background: var(--primary);
    color: #fff;
    padding: 2px 7px;
    border-radius: 12px;
    text-transform: uppercase;
    font-weight: 800;
}

.sidebar-badge.inst {
    background: var(--secondary);
}

.sidebar-nav {
    list-style: none;
    padding: 15px 10px;
    flex-grow: 1;
}

.sidebar-nav li {
    margin-bottom: 4px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.sidebar-nav a.active {
    background-color: var(--primary);
    color: #ffffff;
}

.sidebar-nav.inst-nav a.active {
    background-color: var(--secondary);
}

.sidebar-user {
    padding: 15px;
    border-top: 1px solid rgba(255,255,255,0.08);
    background: #151f30;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-user .user-info {
    overflow: hidden;
}

.sidebar-user .user-name {
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.sidebar-user .user-role {
    font-size: 11px;
    color: #94a3b8;
}

.admin-main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.admin-topbar {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 14px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-body {
    padding: 25px;
    flex-grow: 1;
}

/* Cards & Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: var(--primary-light);
    color: var(--primary);
}

.stat-icon.green {
    background: #ecfdf5;
    color: var(--success);
}

.stat-icon.blue {
    background: #eff6ff;
    color: #2563eb;
}

.stat-icon.amber {
    background: #fffbeb;
    color: var(--warning);
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: #0f172a;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.content-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 25px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ffffff;
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
}

.card-body {
    padding: 20px;
}

/* Tables */
.data-table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

.data-table th {
    background: #f8fafc;
    padding: 12px 14px;
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    color: #475569;
}

.data-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table tr:hover {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-success { background: #dcfce7; color: #166534; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #e0f2fe; color: #075985; }
.badge-warning { background: #fef3c7; color: #92400e; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13.5px;
    font-weight: 600;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease-in-out;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary { background: var(--secondary); color: #fff; }
.btn-secondary:hover { background: var(--secondary-hover); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.btn-outline:hover {
    background: #f1f5f9;
}

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-light { background: #f1f5f9; color: var(--text-main); }
.btn-light:hover { background: #e2e8f0; }

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.form-full {
    grid-column: 1 / -1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 13px;
    font-weight: 600;
    color: #334155;
}

.form-label span.req {
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 9px 12px;
    font-size: 14px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    background: #ffffff;
    color: #1e293b;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

textarea.form-control {
    min-height: 90px;
    resize: vertical;
}

.form-hint {
    font-size: 11.5px;
    color: #64748b;
}

/* Alert Boxes */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 13.5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.alert-success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.alert-danger { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-info { background: #e0f2fe; color: #075985; border: 1px solid #7dd3fc; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fcd34d; }

/* Login Page Layout */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    padding: 32px 30px;
}

.login-header {
    text-align: center;
    margin-bottom: 24px;
}

.login-logo {
    font-size: 32px;
    margin-bottom: 8px;
}

.login-title {
    font-size: 20px;
    font-weight: 700;
    color: #0f172a;
}

.login-subtitle {
    font-size: 13px;
    color: #64748b;
    margin-top: 4px;
}

/* ========== Responsive: Tablet & Mobile ========== */
@media (max-width: 1024px) {
    .admin-sidebar {
        width: 220px;
    }
    .admin-body {
        padding: 18px;
    }
}

@media (max-width: 860px) {
    /* Sidebar turns into a top bar with a horizontally scrollable menu */
    .admin-wrapper {
        flex-direction: column;
    }
    .admin-sidebar {
        width: 100%;
        position: sticky;
        top: 0;
        z-index: 50;
        box-shadow: 0 2px 8px rgba(0,0,0,0.25);
    }
    .sidebar-brand {
        padding: 10px 14px;
        font-size: 15px;
        justify-content: space-between;
    }
    .sidebar-nav {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding: 6px 8px;
        gap: 4px;
        scrollbar-width: none;
    }
    .sidebar-nav::-webkit-scrollbar {
        display: none;
    }
    .sidebar-nav li {
        margin-bottom: 0;
        flex-shrink: 0;
    }
    .sidebar-nav a {
        padding: 7px 11px;
        font-size: 13px;
        gap: 6px;
        white-space: nowrap;
    }
    .sidebar-user {
        padding: 8px 14px;
        font-size: 12px;
    }

    /* Top bar & content */
    .admin-topbar {
        flex-wrap: wrap;
        gap: 10px;
        padding: 12px 16px;
    }
    .topbar-title {
        font-size: 16px;
    }
    .topbar-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    .admin-body {
        padding: 14px;
    }
    .card-header {
        flex-wrap: wrap;
        gap: 10px;
        padding: 14px 16px;
    }
    .card-header form {
        flex-wrap: wrap;
        width: 100%;
    }
    .card-header form .form-control {
        flex: 1 1 140px;
        width: auto !important;
    }
    .card-body {
        padding: 16px;
    }

    /* Forms & grids collapse to a single column */
    .form-grid {
        grid-template-columns: 1fr;
    }
    .admin-body [style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
    .admin-body [style*="max-width"] {
        max-width: 100% !important;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .stat-card {
        padding: 14px;
        gap: 10px;
    }
    .stat-icon {
        width: 38px;
        height: 38px;
        font-size: 17px;
    }
    .stat-value {
        font-size: 20px;
    }

    /* Tables scroll sideways instead of squeezing */
    .data-table {
        font-size: 13px;
        min-width: 760px;
    }
    .data-table th,
    .data-table td {
        padding: 10px;
    }
    .alert {
        flex-wrap: wrap;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .topbar-actions,
    .topbar-actions .btn {
        width: 100%;
        justify-content: center;
    }
    .btn {
        padding: 8px 12px;
    }
    .login-card {
        padding: 24px 18px;
    }
}