/* ===== CSS Variables & Theme ===== */
:root {
    --sidebar-w: 260px;
    --sidebar-bg: #1a1d2e;
    --sidebar-hover: #252840;
    --sidebar-active: #3b3f5c;
    --sidebar-text: #b4b7c9;
    --sidebar-heading: #ffffff;
    --sidebar-section: #6c6f85;
    --topbar-bg: #ffffff;
    --topbar-border: #e9ecef;
    --body-bg: #f0f2f5;
    --card-bg: #ffffff;
    --card-border: #e9ecef;
    --text-primary: #212529;
    --text-muted: #6c757d;
    --accent: #4361ee;
    --accent-hover: #3a56d4;
}

[data-theme="dark"] {
    --topbar-bg: #1e2130;
    --topbar-border: #2d3043;
    --body-bg: #141622;
    --card-bg: #1e2130;
    --card-border: #2d3043;
    --text-primary: #e4e6ef;
    --text-muted: #8c8fa3;
}

[data-theme="dark"] body {
    background-color: var(--body-bg);
    color: var(--text-primary);
}

[data-theme="dark"] .card {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-primary);
}

[data-theme="dark"] .card-header {
    background-color: rgba(255,255,255,.03);
    border-color: var(--card-border);
    color: var(--text-primary);
}

[data-theme="dark"] .card-footer {
    border-color: var(--card-border);
}

[data-theme="dark"] .table {
    color: var(--text-primary);
    --bs-table-bg: transparent;
    --bs-table-hover-bg: rgba(255,255,255,.04);
}

[data-theme="dark"] .table thead th {
    border-color: var(--card-border);
}

[data-theme="dark"] .table td,
[data-theme="dark"] .table th {
    border-color: var(--card-border);
}

[data-theme="dark"] .table-danger {
    --bs-table-bg: rgba(220, 53, 69, .1);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: #252840;
    border-color: var(--card-border);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: #2d3043;
    border-color: var(--accent);
    color: var(--text-primary);
}

[data-theme="dark"] .form-check-input {
    background-color: #252840;
    border-color: #3d405a;
}

[data-theme="dark"] .dropdown-menu {
    background-color: var(--card-bg);
    border-color: var(--card-border);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--sidebar-hover);
}

[data-theme="dark"] .dropdown-item-text {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .modal-content {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    border-color: var(--card-border);
}

[data-theme="dark"] .btn-outline-secondary {
    color: var(--text-muted);
    border-color: var(--card-border);
}

[data-theme="dark"] .btn-outline-secondary:hover {
    background-color: var(--sidebar-hover);
    color: var(--text-primary);
}

[data-theme="dark"] .text-dark { color: var(--text-primary) !important; }
[data-theme="dark"] .text-muted { color: var(--text-muted) !important; }
[data-theme="dark"] .bg-light { background-color: var(--sidebar-hover) !important; }
[data-theme="dark"] .border { border-color: var(--card-border) !important; }

[data-theme="dark"] .alert-info {
    background-color: rgba(13, 202, 240, .1);
    border-color: rgba(13, 202, 240, .2);
    color: #6edff6;
}

[data-theme="dark"] .alert-success {
    background-color: rgba(25, 135, 84, .1);
    border-color: rgba(25, 135, 84, .2);
    color: #75b798;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(220, 53, 69, .1);
    border-color: rgba(220, 53, 69, .2);
    color: #ea868f;
}

[data-theme="dark"] .list-group-item {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-primary);
}

[data-theme="dark"] .page-link {
    background-color: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-primary);
}

[data-theme="dark"] .progress {
    background-color: #252840;
}

/* ===== Body ===== */
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--body-bg);
    margin: 0;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-w);
    min-height: 100vh;
    background: var(--sidebar-bg);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: transform .3s ease;
    overflow-y: auto;
}

.sidebar-header {
    padding: 1.25rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--sidebar-heading);
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar-header h5 {
    font-size: 1.1rem;
    letter-spacing: .3px;
}

.sidebar-nav {
    padding: .5rem 0;
    flex: 1;
}

.sidebar-nav .nav-section {
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--sidebar-section);
    padding: 1rem 1.25rem .4rem;
    text-transform: uppercase;
}

.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .55rem 1.25rem;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: .85rem;
    transition: all .15s;
    border-left: 3px solid transparent;
}

.sidebar-nav .nav-item:hover {
    background: var(--sidebar-hover);
    color: #fff;
}

.sidebar-nav .nav-item.active {
    background: var(--sidebar-active);
    color: #fff;
    border-left-color: var(--accent);
}

.sidebar-nav .nav-item i {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

/* ===== Main Content ===== */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    width: calc(100% - var(--sidebar-w));
}

.top-navbar {
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--topbar-border);
    padding: .6rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.page-content {
    padding: 1.5rem;
    flex: 1;
}

/* ===== Auth Wrapper (Login page) ===== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1d2e 0%, #2d3154 50%, #1a1d2e 100%);
    padding: 1rem;
}

.auth-wrapper .card {
    max-width: 420px;
    width: 100%;
    border: none;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,.3);
}

/* ===== KPI Cards ===== */
.kpi-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem 1.25rem;
    border-radius: 12px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: transform .2s, box-shadow .2s;
    text-decoration: none;
    color: inherit;
}

.kpi-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,.1);
    color: inherit;
}

[data-theme="dark"] .kpi-card:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,.35);
}

.kpi-card .kpi-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.kpi-card .kpi-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.kpi-card .kpi-value {
    font-size: 1.65rem;
    font-weight: 700;
    line-height: 1.15;
    display: block;
}

.kpi-card .kpi-label {
    font-size: .76rem;
    color: var(--text-muted);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Gradient KPI variants */
.kpi-card.kpi-gradient-blue {
    background: linear-gradient(135deg, #4361ee 0%, #3a56d4 100%);
    border: none;
    color: #fff;
}
.kpi-card.kpi-gradient-green {
    background: linear-gradient(135deg, #06d6a0 0%, #059669 100%);
    border: none;
    color: #fff;
}
.kpi-card.kpi-gradient-orange {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border: none;
    color: #fff;
}
.kpi-card.kpi-gradient-red {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border: none;
    color: #fff;
}
.kpi-card.kpi-gradient-purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    border: none;
    color: #fff;
}
.kpi-card.kpi-gradient-blue .kpi-icon,
.kpi-card.kpi-gradient-green .kpi-icon,
.kpi-card.kpi-gradient-orange .kpi-icon,
.kpi-card.kpi-gradient-red .kpi-icon,
.kpi-card.kpi-gradient-purple .kpi-icon {
    background: rgba(255,255,255,.2) !important;
    color: #fff !important;
}
.kpi-card.kpi-gradient-blue .kpi-label,
.kpi-card.kpi-gradient-green .kpi-label,
.kpi-card.kpi-gradient-orange .kpi-label,
.kpi-card.kpi-gradient-red .kpi-label,
.kpi-card.kpi-gradient-purple .kpi-label {
    color: rgba(255,255,255,.85);
}

/* Stats trend indicator */
.kpi-trend {
    font-size: .72rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 2px;
}
.kpi-trend.up { color: #06d6a0; }
.kpi-trend.down { color: #ef4444; }

/* ===== Kanban Board ===== */
.kanban-board {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 1rem;
    min-height: 400px;
}

.kanban-column {
    min-width: 280px;
    max-width: 320px;
    flex: 1;
    background: var(--body-bg);
    border-radius: 10px;
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
}

[data-theme="dark"] .kanban-column {
    background: var(--card-bg);
}

.kanban-column-header {
    padding: .75rem 1rem;
    font-weight: 600;
    font-size: .85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
}

.kanban-cards {
    padding: .75rem;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.kanban-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: .75rem;
    cursor: pointer;
    transition: box-shadow .15s, transform .15s;
    display: block;
    color: inherit;
}

.kanban-card:hover {
    box-shadow: 0 3px 10px rgba(0,0,0,.08);
    transform: translateY(-1px);
    color: inherit;
}

[data-theme="dark"] .kanban-card:hover {
    box-shadow: 0 3px 10px rgba(0,0,0,.3);
}

/* ===== Tables ===== */
.table th {
    font-size: .78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .3px;
    color: var(--text-muted);
    white-space: nowrap;
}

.table td {
    vertical-align: middle;
    font-size: .87rem;
}

/* ===== Cards ===== */
.card {
    border-radius: 10px;
    border-color: var(--card-border);
    background: var(--card-bg);
}

.card-header {
    font-size: .9rem;
    font-weight: 600;
    background: rgba(0,0,0,.02);
}

/* ===== Badges ===== */
.badge-sm {
    font-size: .65rem;
    padding: .2rem .5rem;
}

/* ===== Buttons ===== */
.btn {
    border-radius: 6px;
    font-size: .85rem;
}

/* ===== Scrollbar ===== */
.sidebar::-webkit-scrollbar,
.kanban-cards::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb,
.kanban-cards::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,.15);
    border-radius: 4px;
}

.kanban-cards::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,.15);
}

/* ===== Notifications ===== */
.notif-item {
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--card-border);
    cursor: pointer;
    transition: background .15s;
    font-size: .85rem;
}

.notif-item:hover {
    background: rgba(0,0,0,.03);
}

[data-theme="dark"] .notif-item:hover {
    background: rgba(255,255,255,.04);
}

.notif-item.unread {
    border-left: 3px solid var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 767.98px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
    }

    .kanban-board {
        flex-direction: column;
    }

    .kanban-column {
        min-width: 100%;
        max-width: 100%;
    }

    .page-content {
        padding: 1rem;
    }

    .sidebar.show ~ .sidebar-overlay {
        display: block;
    }
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 1035;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-content > .card,
.page-content > .row,
.page-content > .d-flex {
    animation: fadeIn .3s ease-out;
}

/* ===== Alert Auto-dismiss ===== */
.alert {
    animation: fadeIn .3s ease-out;
}

/* ===== Schedule Cards ===== */
.border-start.border-3 {
    font-size: .82rem;
}

/* ===== Print ===== */
@media print {
    .sidebar, .top-navbar { display: none !important; }
    .main-content { margin-left: 0 !important; width: 100% !important; }
}

/* ===== Dashboard Enhancements ===== */
.dashboard-section-title {
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .6px;
    color: var(--text-muted);
    margin-bottom: .75rem;
    padding-bottom: .4rem;
    border-bottom: 1px solid var(--card-border);
}

/* Chart containers */
.chart-container {
    position: relative;
    padding: 1rem;
}

.chart-container canvas {
    max-height: 220px;
}

/* Quick action buttons */
.quick-btn {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .6rem .9rem;
    border-radius: 8px;
    font-size: .84rem;
    font-weight: 500;
    transition: all .15s;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-primary);
    text-decoration: none;
}

.quick-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    transform: translateX(3px);
}

.quick-btn .quick-btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1rem;
}

/* Activity / Timeline */
.activity-feed {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.activity-item {
    display: flex;
    gap: .75rem;
    padding: .65rem 0;
    border-bottom: 1px solid var(--card-border);
    font-size: .84rem;
}

.activity-item:last-child { border-bottom: none; }

.activity-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    margin-top: 5px;
    flex-shrink: 0;
}

.activity-item .activity-meta {
    font-size: .74rem;
    color: var(--text-muted);
}

/* Stat highlight bar */
.stat-bar {
    height: 4px;
    border-radius: 4px;
    background: var(--card-border);
    overflow: hidden;
    margin-top: .3rem;
}

.stat-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width .5s ease;
}

/* Welcome banner */
.welcome-banner {
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent) 0%, #4361ee 100%);
    color: #fff;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.welcome-banner h5 { margin: 0; font-weight: 700; }
.welcome-banner p { margin: .2rem 0 0; opacity: .85; font-size: .85rem; }
.welcome-banner .welcome-icon { font-size: 2.5rem; opacity: .3; flex-shrink: 0; }

/* Responsive KPI row */
@media (max-width: 575.98px) {
    .kpi-card .kpi-value { font-size: 1.35rem; }
    .kpi-card .kpi-icon { width: 40px; height: 40px; font-size: 1.1rem; }
}