/* ============================================================
   EduQuality — Light & Modern Theme
   Inspired by Linear · Notion · Vercel
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
    /* Brand — indigo */
    --primary:        #4F46E5;
    --primary-d:      #4338CA;
    --primary-l:      #6366F1;
    --primary-50:     #EEF2FF;
    --primary-100:    #E0E7FF;
    --primary-200:    #C7D2FE;

    /* State colors (pastel) */
    --success:        #059669;
    --success-l:      #10B981;
    --success-50:     #ECFDF5;
    --success-100:    #D1FAE5;

    --warning:        #D97706;
    --warning-l:      #F59E0B;
    --warning-50:     #FFFBEB;
    --warning-100:    #FEF3C7;

    --danger:         #DC2626;
    --danger-l:       #EF4444;
    --danger-50:      #FEF2F2;
    --danger-100:    #FEE2E2;

    --info:           #0891B2;
    --info-l:         #06B6D4;
    --info-50:        #ECFEFF;
    --info-100:       #CFFAFE;

    /* Neutrals (slate-tinted) */
    --gray-50:        #F8FAFC;
    --gray-100:       #F1F5F9;
    --gray-200:       #E2E8F0;
    --gray-300:       #CBD5E1;
    --gray-400:       #94A3B8;
    --gray-500:       #64748B;
    --gray-600:       #475569;
    --gray-700:       #334155;
    --gray-800:       #1E293B;
    --gray-900:       #0F172A;

    /* Layout */
    --sidebar-w:      256px;
    --sidebar-w-mini: 76px;
    --topbar-h:       64px;
    --bg:             #FAFBFC;          /* off-white */
    --sidebar-bg:     #FFFFFF;
    --topbar-bg:      rgba(255,255,255,0.85);

    /* Effects */
    --radius-sm:      8px;
    --radius:         12px;
    --radius-lg:      16px;
    --radius-xl:      20px;

    --shadow-xs:      0 1px 2px 0 rgb(15 23 42 / 0.04);
    --shadow-sm:      0 1px 3px 0 rgb(15 23 42 / 0.06), 0 1px 2px -1px rgb(15 23 42 / 0.04);
    --shadow:         0 4px 6px -1px rgb(15 23 42 / 0.06), 0 2px 4px -2px rgb(15 23 42 / 0.04);
    --shadow-md:      0 10px 15px -3px rgb(15 23 42 / 0.08), 0 4px 6px -4px rgb(15 23 42 / 0.04);
    --shadow-lg:      0 20px 25px -5px rgb(15 23 42 / 0.10), 0 8px 10px -6px rgb(15 23 42 / 0.05);
    --shadow-xl:      0 25px 50px -12px rgb(15 23 42 / 0.20);

    --shadow-glow:    0 0 0 4px rgb(79 70 229 / 0.12);

    --transition:     all 0.18s cubic-bezier(.4, 0, .2, 1);
    --transition-slow: all 0.25s cubic-bezier(.4, 0, .2, 1);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;             /* tăng base 14 -> 16px */
    line-height: 1.55;
    color: var(--gray-800);      /* đậm hơn gray-700 */
    background: var(--bg);
    font-weight: 500;            /* base medium thay vì regular */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body { font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11'; }

h1, h2, h3, h4, h5, h6 {
    color: var(--gray-900);
    font-weight: 700;            /* đậm hơn từ 600 -> 700 */
    letter-spacing: -0.011em;
    line-height: 1.3;
}

h1 { letter-spacing: -0.022em; font-size: 2rem; }
h2 { letter-spacing: -0.018em; font-size: 1.65rem; }
h3 { letter-spacing: -0.018em; font-size: 1.4rem; }
h4 { letter-spacing: -0.014em; font-size: 1.2rem; }
h5 { font-size: 1.08rem; }
h6 { font-size: 0.96rem; }

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-d); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 6px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--gray-300); }

::selection { background: var(--primary-100); color: var(--primary-d); }

/* ---------- App Shell ---------- */
.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    height: 100vh;
    overflow: hidden;
}

@media (max-width: 992px) and (min-width: 769px) {
    .app-shell { grid-template-columns: var(--sidebar-w-mini) 1fr; }
    .app-brand span, .app-nav .nav-section, .app-nav .nav-item span { display: none; }
    .app-nav .nav-item { justify-content: center; padding: 12px 0; }
}

/* ---------- Sidebar toggle (mobile) ---------- */
.sidebar-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    color: var(--gray-700);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}
.sidebar-toggle:hover { background: var(--gray-50); color: var(--primary); }
.sidebar-toggle:focus { outline: none; box-shadow: var(--shadow-glow); }

.topbar-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.topbar-left .topbar-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.app-shell.sidebar-open .sidebar-backdrop { opacity: 1; }

/* ---------- Mobile (≤768px) ---------- */
@media (max-width: 768px) {
    html, body { font-size: 15px; }

    .app-shell { grid-template-columns: 1fr; }

    .sidebar-toggle { display: inline-flex; align-items: center; justify-content: center; }

    .app-sidebar {
        position: fixed;
        top: 0; left: 0; bottom: 0;
        width: min(82vw, 300px);
        z-index: 999;
        transform: translateX(-100%);
        transition: transform 0.25s cubic-bezier(.4, 0, .2, 1);
        box-shadow: var(--shadow-lg);
    }
    .app-shell.sidebar-open .app-sidebar { transform: translateX(0); }
    .app-shell.sidebar-open .sidebar-backdrop { display: block; }

    .app-brand span, .app-nav .nav-section, .app-nav .nav-item span { display: inline; }
    .app-nav .nav-item { justify-content: flex-start; padding: 11px 14px; }

    .app-topbar { padding: 0 14px; gap: 8px; }
    .topbar-title { font-size: 1.02rem; }
    .topbar-right { gap: 8px; }

    /* Compact user info: ẩn tên dài, giữ avatar + badge role */
    .user-info { padding: 5px 10px; gap: 6px; font-size: 0.85rem; }
    .user-info .user-name { display: none; }
    .user-info i { font-size: 1.1rem; }

    /* Logout: chỉ icon trên mobile */
    .app-topbar form .btn-label { display: none; }
    .app-topbar form .btn { padding: 6px 10px; }

    .app-content { padding: 14px 12px; }

    /* Tables: cuộn ngang thay vì vỡ layout */
    .table-responsive, .card .table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .table { font-size: 0.88rem; }
    .table th, .table td { padding: 8px 10px; white-space: nowrap; }

    /* Page header: stack dọc */
    .page-header,
    .d-flex.justify-content-between.align-items-center.mb-3 {
        flex-direction: column;
        align-items: stretch !important;
        gap: 12px;
    }
    .page-header > *,
    .d-flex.justify-content-between.align-items-center.mb-3 > * { width: 100%; }

    /* Card padding gọn hơn */
    .card-body { padding: 14px; }
    .card-header { padding: 12px 14px; font-size: 0.98rem; }

    /* Stat card thu gọn */
    .stat-card { padding: 16px; }
    .stat-card .stat-value { font-size: 1.85rem; }

    /* Heading nhỏ lại */
    h1 { font-size: 1.55rem; }
    h2 { font-size: 1.35rem; }
    h3 { font-size: 1.2rem; }
    h4 { font-size: 1.08rem; }

    /* Form group: input chiếm full width, không bị nén */
    .form-control, .form-select { font-size: 16px; /* tránh iOS auto-zoom */ }

    /* Nhóm nút trong cell hành động: cho phép wrap */
    .text-end .btn, td .btn { margin-bottom: 2px; }

    /* Modal full-width hơn */
    .modal-dialog { margin: 8px; max-width: calc(100vw - 16px); }
}

/* ---------- Phone nhỏ (≤480px) ---------- */
@media (max-width: 480px) {
    .app-content { padding: 10px 8px; }
    .topbar-title { font-size: 0.95rem; }
    .user-info .badge { font-size: 0.68rem; padding: 3px 7px; }
    .stat-card .stat-value { font-size: 1.6rem; }
    .btn { padding: 8px 14px; font-size: 0.9rem; }
    .btn-sm { padding: 5px 10px; font-size: 0.82rem; }
}

/* ---------- Sidebar (LIGHT) ---------- */
.app-sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--gray-100);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 22px;
    height: var(--topbar-h);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.02em;
    border-bottom: 1px solid var(--gray-100);
    flex-shrink: 0;
}

    .app-brand i {
        color: #fff;
        font-size: 1.15rem;
        /*background: linear-gradient(135deg, var(--primary) 0%, var(--primary-l) 100%);*/
        background-image: url('/images/logo.png');
        background-size: contain;
        background-position: center;
        background-repeat: no-repeat;
        background-color: #152347;
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        box-shadow: 0 4px 12px -2px rgba(79, 70, 229, 0.4);
        flex-shrink: 0;
    }

.app-nav { padding: 14px 12px; flex: 1; }

.app-nav .nav-section {
    padding: 18px 14px 8px;
    font-size: 0.74rem;
    color: var(--gray-500);
    letter-spacing: 1.4px;
    font-weight: 800;
    text-transform: uppercase;
}

.app-nav .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    margin: 2px 0;
    border-radius: var(--radius-sm);
    color: var(--gray-700);
    text-decoration: none;
    font-size: 0.97rem;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

.app-nav .nav-item:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.app-nav .nav-item.active {
    background: var(--primary-50);
    color: var(--primary-d);
    font-weight: 700;
}

.app-nav .nav-item.active::before {
    content: '';
    position: absolute; left: -12px; top: 50%; transform: translateY(-50%);
    width: 3px; height: 22px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
}

.app-nav .nav-item i {
    font-size: 1.18rem;
    width: 22px;
    text-align: center;
    color: var(--gray-500);
    transition: var(--transition);
}

.app-nav .nav-item:hover i { color: var(--gray-700); }
.app-nav .nav-item.active i { color: var(--primary); }

/* ---------- Main / Topbar ---------- */
.app-main {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg);
}

.app-topbar {
    background: var(--topbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-100);
    padding: 0 28px;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar-title {
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.015em;
}

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

.user-info {
    font-size: 0.95rem;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 999px;
    font-weight: 600;
}

.user-info i {
    color: var(--primary);
    font-size: 1.25rem;
}

.user-info .badge {
    font-size: 0.75rem;
    padding: 4px 10px;
}

.app-topbar .btn-outline-light {
    color: var(--gray-600);
    border-color: var(--gray-200);
    background: #fff;
    font-weight: 500;
}

.app-topbar .btn-outline-light:hover {
    background: var(--danger-50);
    border-color: var(--danger-100);
    color: var(--danger);
}

.app-content {
    flex: 1;
    overflow-y: auto;
    padding: 28px 32px;
}

/* ---------- Cards ---------- */
.card {
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--gray-200);
}

.card-header {
    background: #fff;
    border-bottom: 1px solid var(--gray-100);
    font-weight: 700;
    color: var(--gray-900);
    padding: 16px 22px;
    border-radius: var(--radius) var(--radius) 0 0 !important;
    font-size: 1.05rem;
    letter-spacing: -0.005em;
}

.card-body { padding: 22px; }

/* KPI / stat card */
.stat-card {
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    background: #fff;
    padding: 22px;
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

.stat-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--primary);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--gray-200);
}

.stat-card:hover::before { opacity: 1; }

.stat-card .stat-label {
    font-size: 0.86rem;
    color: var(--gray-600);
    font-weight: 700;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

.stat-card .stat-value {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.1;
    margin: 10px 0 4px;
    letter-spacing: -0.028em;
}

.stat-card.success::before { background: var(--success-l); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.warning::before { background: var(--warning-l); }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.danger::before { background: var(--danger-l); }
.stat-card.danger .stat-value  { color: var(--danger); }
.stat-card.primary::before { background: var(--primary); }
.stat-card.primary .stat-value { color: var(--primary); }

/* ---------- Buttons ---------- */
.btn {
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: 9px 18px;
    font-size: 0.95rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border: 1px solid transparent;
    line-height: 1.4;
}

.btn:focus, .btn.focus { box-shadow: var(--shadow-glow); outline: none; }

.btn-sm { padding: 6px 13px; font-size: 0.86rem; gap: 5px; }
.btn-lg { padding: 12px 24px; font-size: 1.02rem; gap: 8px; font-weight: 700; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-l) 100%);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2), inset 0 1px 0 rgba(255,255,255,0.15);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 12px -2px rgba(79, 70, 229, 0.4), inset 0 1px 0 rgba(255,255,255,0.15);
    color: #fff;
}
.btn-primary:active { transform: translateY(0); }

.btn-success {
    background: var(--success-l); border-color: var(--success-l); color: #fff;
    box-shadow: 0 1px 2px rgba(16, 185, 129, 0.25);
}
.btn-success:hover { background: var(--success); border-color: var(--success); transform: translateY(-1px); box-shadow: 0 4px 10px -2px rgba(16, 185, 129, 0.4); }

.btn-warning {
    background: var(--warning-l); border-color: var(--warning-l); color: #fff;
    box-shadow: 0 1px 2px rgba(245, 158, 11, 0.25);
}
.btn-warning:hover { background: var(--warning); border-color: var(--warning); transform: translateY(-1px); color: #fff; }

.btn-danger  {
    background: var(--danger-l); border-color: var(--danger-l); color: #fff;
    box-shadow: 0 1px 2px rgba(239, 68, 68, 0.25);
}
.btn-danger:hover { background: var(--danger); border-color: var(--danger); transform: translateY(-1px); }

.btn-outline-primary { border-color: var(--gray-200); color: var(--primary); background: #fff; }
.btn-outline-primary:hover { background: var(--primary-50); border-color: var(--primary-200); color: var(--primary-d); }

.btn-outline-success { border-color: var(--gray-200); color: var(--success); background: #fff; }
.btn-outline-success:hover { background: var(--success-50); border-color: var(--success-100); color: var(--success); }

.btn-outline-warning { border-color: var(--gray-200); color: var(--warning); background: #fff; }
.btn-outline-warning:hover { background: var(--warning-50); border-color: var(--warning-100); color: var(--warning); }

.btn-outline-danger { border-color: var(--gray-200); color: var(--danger); background: #fff; }
.btn-outline-danger:hover { background: var(--danger-50); border-color: var(--danger-100); color: var(--danger); }

.btn-light { background: #fff; border-color: var(--gray-200); color: var(--gray-700); }
.btn-light:hover { background: var(--gray-50); border-color: var(--gray-300); color: var(--gray-900); }

.btn-link { color: var(--primary); text-decoration: none; padding: 0; font-weight: 500; }
.btn-link:hover { color: var(--primary-d); text-decoration: none; }

/* ---------- Forms ---------- */
.form-control, .form-select {
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 0.98rem;
    font-weight: 500;
    transition: var(--transition);
    color: var(--gray-900);
    background: #fff;
    line-height: 1.45;
}

.form-control::placeholder { color: var(--gray-400); }

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    outline: none;
}

.form-control:hover:not(:focus):not(:disabled) {
    border-color: var(--gray-300);
}

.form-control:disabled, .form-control[readonly] {
    background: var(--gray-50);
    color: var(--gray-500);
}

.form-label {
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--gray-800);
    margin-bottom: 7px;
    letter-spacing: 0.005em;
}

.input-group-text {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    color: var(--gray-500);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.input-group .form-control { border-left: none; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.input-group .form-control:focus { border-color: var(--primary); }
.input-group:focus-within .input-group-text {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-50);
}

/* Choices.js */
.choices { margin-bottom: 0; }
.choices__inner {
    border: 1px solid var(--gray-200) !important;
    border-radius: var(--radius-sm) !important;
    background: #fff !important;
    padding: 6px 12px !important;
    min-height: 40px !important;
    font-size: 0.9rem;
    transition: var(--transition);
}
.choices.is-focused .choices__inner {
    border-color: var(--primary) !important;
    box-shadow: var(--shadow-glow);
}
.choices__list--dropdown {
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-top: 4px;
}
.choices__list--dropdown .choices__item--selectable.is-highlighted {
    background: var(--primary-50);
    color: var(--primary-d);
}
.choices[data-type*="select-one"]::after { border-color: var(--gray-400) transparent transparent !important; }

/* Flatpickr */
.flatpickr-calendar {
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    border: 1px solid var(--gray-100);
    font-family: 'Inter', sans-serif;
}
.flatpickr-day.selected { background: var(--primary); border-color: var(--primary); }
.flatpickr-day.today { border-color: var(--primary); color: var(--primary); }
.flatpickr-day:hover { background: var(--gray-100); }

/* ---------- Tables ---------- */
.table {
    margin-bottom: 0;
    color: var(--gray-800);
    font-size: 0.98rem;
}

.table thead th {
    background: var(--gray-50);
    color: var(--gray-700);
    font-weight: 700;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.7px;
    border-bottom: 2px solid var(--gray-200);
    padding: 14px 18px;
    white-space: nowrap;
}

.table tbody td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
    font-size: 0.96rem;
    font-weight: 500;
}

.table tbody td strong, .table tbody td b {
    font-weight: 700;
    color: var(--gray-900);
}

.table tbody tr:last-child td { border-bottom: none; }

.table-hover tbody tr { transition: var(--transition); }
.table-hover tbody tr:hover { background: var(--gray-50); }

/* DataTables */
.dataTables_wrapper { padding: 14px 18px 6px; }
.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    margin-left: 8px;
    background: #fff;
    transition: var(--transition);
}
.dataTables_wrapper .dataTables_filter input:focus { border-color: var(--primary); outline: none; box-shadow: var(--shadow-glow); }
.dataTables_wrapper .dataTables_paginate .paginate_button {
    border: 1px solid var(--gray-200) !important;
    border-radius: var(--radius-sm) !important;
    margin: 0 2px !important;
    padding: 4px 10px !important;
    background: #fff !important;
    color: var(--gray-700) !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--gray-50) !important;
    border-color: var(--gray-300) !important;
    color: var(--gray-900) !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
}

/* ---------- Badges ---------- */
.badge {
    font-weight: 700;
    padding: 5px 11px;
    border-radius: 999px;
    font-size: 0.78rem;
    letter-spacing: 0.3px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    line-height: 1.4;
}

.badge.bg-primary   { background: var(--primary-100) !important; color: var(--primary-d) !important; }
.badge.bg-success   { background: var(--success-100) !important; color: var(--success)   !important; }
.badge.bg-warning   { background: var(--warning-100) !important; color: #92400E         !important; }
.badge.bg-danger    { background: var(--danger-100)  !important; color: var(--danger)    !important; }
.badge.bg-info      { background: var(--info-100)    !important; color: #155E75          !important; }
.badge.bg-secondary { background: var(--gray-100)    !important; color: var(--gray-700)  !important; }

/* ---------- Alerts ---------- */
.alert {
    border: 1px solid transparent;
    border-radius: var(--radius);
    padding: 14px 18px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.97rem;
    font-weight: 500;
}

.alert i { font-size: 1.25rem; flex-shrink: 0; margin-top: 2px; }
.alert strong, .alert b { font-weight: 700; }

.alert-success { background: var(--success-50); border-color: var(--success-100); color: #065F46; }
.alert-success i { color: var(--success-l); }

.alert-warning { background: var(--warning-50); border-color: var(--warning-100); color: #92400E; }
.alert-warning i { color: var(--warning-l); }

.alert-danger  { background: var(--danger-50);  border-color: var(--danger-100);  color: #991B1B; }
.alert-danger i  { color: var(--danger-l); }

.alert-info    { background: var(--info-50);    border-color: var(--info-100);  color: #155E75; }
.alert-info i { color: var(--info-l); }

/* ---------- Accordion ---------- */
.accordion-item {
    border: 1px solid var(--gray-100);
    border-radius: var(--radius) !important;
    margin-bottom: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
}

.accordion-item:hover { box-shadow: var(--shadow-sm); }

.accordion-button {
    background: #fff;
    color: var(--gray-900);
    font-weight: 600;
    padding: 16px 22px;
    box-shadow: none !important;
    font-size: 1.02rem;
}

.accordion-button:not(.collapsed) {
    background: var(--primary-50);
    color: var(--primary-d);
}

.accordion-button:focus { border-color: transparent; box-shadow: none; }

.accordion-body { background: #fff; }

/* ---------- Tabs ---------- */
.nav-tabs {
    border-bottom: 1px solid var(--gray-100);
    margin-bottom: 0;
    gap: 4px;
}

.nav-tabs .nav-link {
    border: none;
    color: var(--gray-600);
    font-weight: 600;
    padding: 13px 20px;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition);
    font-size: 0.98rem;
}

.nav-tabs .nav-link:hover { color: var(--gray-900); border-color: var(--gray-200); background: transparent; }

.nav-tabs .nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: transparent;
    font-weight: 700;
}

/* ---------- Progress ---------- */
.progress {
    background: var(--gray-100);
    border-radius: 999px;
    height: 6px;
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-l) 100%);
    transition: width 0.4s cubic-bezier(.4, 0, .2, 1);
}
.progress-bar.bg-success { background: linear-gradient(90deg, var(--success) 0%, var(--success-l) 100%) !important; }

/* ---------- Login page (LIGHT) ---------- */
.public-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.12) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.10) 0%, transparent 60%),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.5) 0%, transparent 70%),
        linear-gradient(135deg, #FAFBFC 0%, #F1F5F9 100%);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.public-shell::before, .public-shell::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    pointer-events: none;
}
.public-shell::before {
    width: 400px; height: 400px;
    background: var(--primary-200);
    top: -100px; left: -100px;
    animation: float 8s ease-in-out infinite;
}
.public-shell::after {
    width: 350px; height: 350px;
    background: var(--info-100);
    bottom: -100px; right: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 44px 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.5);
    animation: floatIn 0.6s cubic-bezier(.4, 0, .2, 1);
    position: relative;
    z-index: 1;
}

@keyframes floatIn {
    from { opacity: 0; transform: translateY(30px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-card h3 {
    color: var(--gray-900);
    font-weight: 800;
    font-size: 1.85rem;
    letter-spacing: -0.028em;
}

.login-card .bi-mortarboard-fill {
    background: linear-gradient(135deg, var(--primary) 0%, var(--info-l) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ---------- Dynamic grid (declarations) ---------- */
.dyn-grid table { margin-bottom: 0; }

.dyn-grid input.form-control {
    padding: 6px 10px;
    font-size: 0.86rem;
    border: 1px solid var(--gray-200);
    background: var(--gray-50);
    border-radius: var(--radius-sm);
}

.dyn-grid input.form-control:hover { background: #fff; border-color: var(--gray-300); }
.dyn-grid input.form-control:focus { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.12); }
.dyn-grid input.form-control:disabled { background: var(--gray-100); border-color: var(--gray-200); color: var(--gray-500); }

/* ── Admin Declarations editor — 3-layer cell ── */
.cell-3layer { display: flex; flex-direction: column; gap: 4px; }
.cell-3layer .layer-label { font-weight: 600; color: var(--gray-500); margin-right: 4px; }
.cell-3layer .cell-adj { background: #FFFBEB; border-color: #FCD34D; }
.cell-3layer .cell-adj:focus { background: #fff; border-color: var(--warning); box-shadow: 0 0 0 3px rgba(217, 119, 6, .12); }
.cell-3layer .btn-remove-adj { text-align: left; text-decoration: underline; }

/* ---------- Misc ---------- */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }

code {
    background: var(--gray-100);
    color: var(--primary-d);
    padding: 3px 8px;
    border-radius: 5px;
    font-size: 0.88em;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-weight: 600;
}

.text-muted { color: var(--gray-600) !important; font-weight: 500; }
.small { font-size: 0.88rem !important; font-weight: 500; }

/* Toastify */
.toastify {
    border-radius: var(--radius) !important;
    box-shadow: var(--shadow-lg) !important;
    font-family: 'Inter', sans-serif !important;
    font-size: 0.9rem !important;
    font-weight: 500;
    padding: 14px 20px !important;
    border: 1px solid rgba(255,255,255,0.15);
}

/* NProgress */
#nprogress .bar { background: var(--primary) !important; height: 3px !important; box-shadow: 0 0 10px var(--primary); }
#nprogress .peg { box-shadow: 0 0 10px var(--primary), 0 0 5px var(--primary) !important; }
#nprogress .spinner-icon { border-top-color: var(--primary) !important; border-left-color: var(--primary) !important; }

/* No spinner on number inputs */
.no-spinner::-webkit-outer-spin-button,
.no-spinner::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.no-spinner { -moz-appearance: textfield; }

/* Page fade-in */
.app-content > * { animation: fadeIn 0.3s cubic-bezier(.4, 0, .2, 1); }
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Section heading */
.section-title {
    font-size: 1.55rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 4px;
    letter-spacing: -0.025em;
}
.section-subtitle {
    font-size: 1rem;
    color: var(--gray-600);
    margin-bottom: 22px;
    font-weight: 500;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}
.empty-state i { font-size: 3.5rem; color: var(--gray-200); display: block; margin-bottom: 14px; }
.empty-state p { font-size: 0.95rem; }

/* Welcome banner gradient */
.welcome-banner {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: #fff;
    border: none;
    position: relative;
    overflow: hidden;
}

.welcome-banner::before {
    content: '';
    position: absolute;
    top: -50%; right: -10%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.welcome-banner h3 { color: #fff; letter-spacing: -0.02em; }

/* SweetAlert2 customization */
.swal2-popup {
    border-radius: var(--radius-lg) !important;
    font-family: 'Inter', sans-serif !important;
    box-shadow: var(--shadow-xl) !important;
}
.swal2-title { color: var(--gray-900) !important; font-weight: 600 !important; }
.swal2-html-container { color: var(--gray-600) !important; }
.swal2-confirm { border-radius: var(--radius-sm) !important; box-shadow: 0 4px 12px -2px rgba(79, 70, 229, 0.4) !important; }
.swal2-cancel { border-radius: var(--radius-sm) !important; }

/* Bootstrap utilities polish */
.shadow { box-shadow: var(--shadow) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }

/* ============================================================
   Workflow Guide — step-by-step timeline
   ============================================================ */
.workflow {
    position: relative;
    padding-left: 0;
    list-style: none;
    margin: 0;
}

.workflow-stage {
    background: linear-gradient(135deg, var(--primary-50) 0%, #fff 100%);
    border: 1px solid var(--primary-100);
    border-radius: var(--radius-lg);
    padding: 22px 26px;
    margin-bottom: 24px;
}

.workflow-stage.stage-setup    { border-color: var(--primary-100); background: linear-gradient(135deg, var(--primary-50) 0%, #fff 100%); }
.workflow-stage.stage-operate  { border-color: var(--success-100); background: linear-gradient(135deg, var(--success-50) 0%, #fff 100%); }
.workflow-stage.stage-report   { border-color: var(--info-100);    background: linear-gradient(135deg, var(--info-50) 0%, #fff 100%); }

.workflow-stage h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
    font-size: 1.3rem;
    font-weight: 800;
}
.workflow-stage h4 .stage-icon {
    width: 44px; height: 44px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--radius);
    color: #fff;
    font-size: 1.4rem;
}
.workflow-stage.stage-setup    h4 .stage-icon { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-l) 100%); }
.workflow-stage.stage-operate  h4 .stage-icon { background: linear-gradient(135deg, var(--success) 0%, var(--success-l) 100%); }
.workflow-stage.stage-report   h4 .stage-icon { background: linear-gradient(135deg, var(--info) 0%, var(--info-l) 100%); }

.workflow-stage > p { margin-left: 56px; color: var(--gray-700); margin-bottom: 18px; font-size: 1rem; }

.workflow-steps {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: step-counter;
    position: relative;
}

.workflow-step {
    position: relative;
    padding: 16px 18px 16px 62px;
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    margin-bottom: 12px;
    box-shadow: var(--shadow-xs);
    transition: var(--transition);
    counter-increment: step-counter;
}

.workflow-step:hover { box-shadow: var(--shadow); transform: translateX(4px); border-color: var(--primary-200); }

.workflow-step::before {
    content: counter(step-counter);
    position: absolute;
    left: 14px; top: 50%; transform: translateY(-50%);
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.05rem;
    border: 2px solid var(--gray-200);
    transition: var(--transition);
}

.workflow-stage.stage-setup    .workflow-step::before { background: var(--primary-100);  color: var(--primary-d); border-color: var(--primary-200); }
.workflow-stage.stage-operate  .workflow-step::before { background: var(--success-100); color: var(--success);   border-color: var(--success-100); }
.workflow-stage.stage-report   .workflow-step::before { background: var(--info-100);    color: #155E75;          border-color: var(--info-100); }

.workflow-step .step-title {
    font-weight: 700;
    color: var(--gray-900);
    font-size: 1.02rem;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.workflow-step .step-title .role-tag {
    font-size: 0.7rem;
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--gray-100);
    color: var(--gray-700);
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
}
.workflow-step .role-tag.role-admin  { background: var(--primary-100);  color: var(--primary-d); }
.workflow-step .role-tag.role-member { background: var(--success-100); color: var(--success); }
.workflow-step .role-tag.role-owner  { background: var(--info-100);    color: #155E75; }

.workflow-step .step-desc {
    color: var(--gray-700);
    font-size: 0.94rem;
    line-height: 1.5;
}

.workflow-step .step-actions {
    margin-top: 8px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.workflow-arrow {
    text-align: center;
    color: var(--primary);
    font-size: 1.6rem;
    margin: -2px 0 4px;
}

/* Inline guide hint trên các trang */
.page-hint {
    background: var(--info-50);
    border: 1px solid var(--info-100);
    border-radius: var(--radius);
    padding: 12px 16px;
    margin-bottom: 18px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.95rem;
    color: #155E75;
}
.page-hint i { font-size: 1.2rem; color: var(--info-l); flex-shrink: 0; margin-top: 2px; }
.page-hint strong { color: #0E4A5F; }

/* Page header utility */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.page-header .section-title { margin-bottom: 4px; }
.page-header .section-subtitle { margin-bottom: 0; }