:root {
    --sunn-blue: #0F4C81;
    --sunn-blue-dark: #0A3A63;
    --sunn-blue-light: #1A5D99;
    --ccis-silver: #6C757D;
    --sunn-gold: #F4B400;
    --sunn-green: #2E7D32;
    --sunn-red: #C62828;
    --sunn-orange: #FB8C00;
    --bg-light: #F5F7FA;
    --border-gray: #DDE2E8;
    --dark-text: #212529;
    --text-muted: #6C757D;
    --card-shadow: 0 2px 8px rgba(15, 76, 129, 0.08);
    --card-radius: 10px;
    --transition: all .2s ease;
}

* { box-sizing: border-box; }

body {
    background: var(--bg-light);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark-text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ===== LAYOUT ===== */
#wrapper {
    display: flex;
    min-height: 100vh;
}

#page-content-wrapper {
    flex: 1;
    margin-left: 260px;
    min-width: 0;
}

/* ===== SIDEBAR ===== */
#sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 260px;
    background: var(--sunn-blue);
    z-index: 1000;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.2); border-radius: 4px; }

.sidebar-heading {
    padding: 24px 20px 8px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    text-align: center;
    letter-spacing: 2px;
}

.sidebar-subheading {
    text-align: center;
    color: rgba(255,255,255,.6);
    font-size: .75rem;
    padding: 0 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    margin-bottom: 8px;
}

#sidebar .nav-item { margin: 2px 8px; }

#sidebar .nav-link {
    display: flex;
    align-items: center;
    color: rgba(255,255,255,.75);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: .9rem;
    gap: 12px;
    transition: var(--transition);
}

#sidebar .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,.1);
}

#sidebar .nav-link.active {
    color: #212529;
    background: var(--sunn-gold);
    font-weight: 600;
}

#sidebar .nav-link.active i { color: #212529; }

#sidebar .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

#sidebar .nav-divider {
    height: 1px;
    background: rgba(255,255,255,.1);
    margin: 8px 16px;
}

/* ===== TOP NAVBAR ===== */
.top-navbar {
    background: #fff;
    border-bottom: 1px solid var(--border-gray);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 999;
}

.top-navbar .breadcrumb {
    margin: 0;
    background: none;
    font-size: .85rem;
}

.top-navbar .breadcrumb-item + .breadcrumb-item::before {
    color: var(--ccis-silver);
}

.top-navbar .breadcrumb-item a {
    color: var(--ccis-silver);
    text-decoration: none;
}

.top-navbar .breadcrumb-item a:hover {
    color: var(--sunn-blue);
}

.top-navbar .breadcrumb-item.active {
    color: var(--sunn-blue);
    font-weight: 600;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.role-badge {
    font-size: .7rem;
    padding: 3px 10px;
    border-radius: 20px;
    background: rgba(15, 76, 129, 0.1);
    color: var(--sunn-blue);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.user-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    padding: 6px 12px;
    cursor: pointer;
    transition: var(--transition);
}

.user-dropdown-toggle:hover {
    border-color: var(--sunn-blue);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--sunn-blue);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .85rem;
    font-weight: 600;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    padding: 24px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--sunn-blue);
    margin: 0;
}

.page-title i {
    margin-right: 10px;
}

/* ===== CARDS ===== */
.card {
    border: none;
    box-shadow: var(--card-shadow);
    border-radius: var(--card-radius);
}

.card-header {
    background: #fff;
    border-bottom: 1px solid var(--border-gray);
    padding: 16px 20px;
    font-weight: 600;
    border-radius: var(--card-radius) var(--card-radius) 0 0 !important;
}

.card-body { padding: 20px; }

/* Stat Cards */
.stat-card {
    border-radius: var(--card-radius);
    border: none;
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: transform .2s, box-shadow .2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(15,76,129,.15);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: rgba(15,76,129,.1); color: var(--sunn-blue); }
.stat-icon.gold { background: rgba(244,180,0,.1); color: var(--sunn-gold); }
.stat-icon.green { background: rgba(46,125,50,.1); color: var(--sunn-green); }
.stat-icon.silver { background: rgba(108,117,125,.1); color: var(--ccis-silver); }
.stat-icon.red { background: rgba(198,40,40,.1); color: var(--sunn-red); }
.stat-icon.teal { background: rgba(0,151,167,.1); color: #0097A7; }
.stat-icon.purple { background: rgba(123,31,162,.1); color: #7B1FA2; }
.stat-icon.orange { background: rgba(251,140,0,.1); color: var(--sunn-orange); }

.stat-content { flex: 1; }

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-text);
}

.stat-label {
    font-size: .85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== BUTTONS ===== */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 8px 18px;
    transition: var(--transition);
}

.btn-primary { background: var(--sunn-blue); border-color: var(--sunn-blue); color: #fff; }
.btn-primary:hover { background: var(--sunn-blue-dark); border-color: var(--sunn-blue-dark); color: #fff; }
.btn-outline-primary { color: var(--sunn-blue); border-color: var(--sunn-blue); }
.btn-outline-primary:hover { background: var(--sunn-blue); border-color: var(--sunn-blue); color: #fff; }

.btn-secondary { background: var(--ccis-silver); border-color: var(--ccis-silver); }
.btn-success { background: var(--sunn-green); border-color: var(--sunn-green); }
.btn-warning { background: var(--sunn-gold); border-color: var(--sunn-gold); color: #212529; }
.btn-warning:hover { background: #dda000; border-color: #dda000; color: #212529; }
.btn-danger { background: var(--sunn-red); border-color: var(--sunn-red); }

/* ===== TABLES ===== */
.table {
    margin-bottom: 0;
}

.table th {
    background: var(--bg-light);
    font-weight: 600;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--ccis-silver);
    border-bottom: 2px solid var(--border-gray);
    padding: 12px 12px;
}

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

.table-hover tbody tr:hover {
    background: rgba(15, 76, 129, 0.03);
}

/* ===== BADGES ===== */
.badge {
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: .78rem;
}

.badge.bg-imported { background: var(--ccis-silver); color: #fff; }
.badge.bg-for-admission { background: var(--sunn-blue); color: #fff; }
.badge.bg-code-generated { background: var(--sunn-gold); color: #212529; }
.badge.bg-aptitude-taken { background: #0097A7; color: #fff; }
.badge.bg-interview-evaluated { background: #7B1FA2; color: #fff; }
.badge.bg-ranked { background: #1565C0; color: #fff; }
.badge.bg-qualified { background: var(--sunn-green); color: #fff; }
.badge.bg-waitlisted { background: var(--sunn-orange); color: #fff; }
.badge.bg-not-qualified { background: var(--sunn-red); color: #fff; }

/* ===== LOGIN PAGE ===== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0F4C81 0%, #1A5D99 50%, #F4B400 100%);
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 440px;
    border: none;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 16px 48px rgba(0,0,0,.2);
}

.login-card .card-body {
    padding: 40px 36px;
}

.login-logo {
    text-align: center;
    margin-bottom: 4px;
}

.login-logo .brand {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--sunn-blue);
    letter-spacing: 3px;
}

.login-logo .brand-sub {
    font-size: .7rem;
    color: var(--ccis-silver);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: -4px;
}

.login-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: .82rem;
    margin-bottom: 28px;
    line-height: 1.5;
}

/* ===== FORMS ===== */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid var(--border-gray);
    padding: 10px 14px;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--sunn-blue);
    box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.1);
}

.form-label {
    font-weight: 500;
    font-size: .85rem;
    color: var(--dark-text);
    margin-bottom: 6px;
}

/* ===== MODALS ===== */
.modal-content {
    border: none;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,.15);
}

.modal-header {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-gray);
    border-radius: 12px 12px 0 0;
    padding: 16px 20px;
}

.modal-title {
    font-weight: 600;
    color: var(--sunn-blue);
}

.modal-footer {
    border-top: 1px solid var(--border-gray);
    padding: 12px 20px;
}

/* ===== TIMER ===== */
.timer-display {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--sunn-red);
    font-family: 'Courier New', monospace;
    background: rgba(198,40,40,.08);
    padding: 4px 16px;
    border-radius: 8px;
}

.timer-warning {
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: .5; }
    100% { opacity: 1; }
}

/* ===== STICKY COLUMNS ===== */
.sticky-col {
    position: sticky;
    z-index: 2;
    background-color: #fff;
}
.table thead .sticky-col {
    background-color: var(--bg-light);
    z-index: 3;
}
.table-striped tbody tr:nth-of-type(odd) .sticky-col {
    background-color: #fff;
}
.table-striped tbody tr:nth-of-type(even) .sticky-col {
    background-color: #fafbfc;
}
.table-hover tbody tr:hover .sticky-col {
    background-color: #f0f2f5;
}

/* ===== DATA TABLES OVERRIDES ===== */
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    padding: 6px 12px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--sunn-blue) !important;
    color: #fff !important;
    border-color: var(--sunn-blue) !important;
    border-radius: 6px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    border-radius: 6px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    #sidebar {
        left: -260px;
    }
    #sidebar.show {
        left: 0;
    }
    #page-content-wrapper {
        margin-left: 0;
    }
    .top-navbar {
        padding: 10px 16px;
    }
    .main-content {
        padding: 16px;
    }
    .page-title {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .login-card .card-body {
        padding: 24px 20px;
    }
    .stat-card {
        padding: 16px;
    }
    .stat-number {
        font-size: 1.4rem;
    }
    .stat-icon {
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }
}