/* IIZ Student Portal Dark Theme */
:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #111730;
    --bg-card: rgba(17, 23, 48, 0.85);
    --bg-input: rgba(15, 23, 42, 0.6);
    --border-color: rgba(59, 130, 246, 0.12);
    --border-hover: rgba(59, 130, 246, 0.3);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);
}

body {
    background: var(--bg-primary) !important;
    color: var(--text-primary) !important;
    font-family: 'Inter', 'Open Sans', -apple-system, sans-serif !important;
    position: relative;
}

/* Subtle grid background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(59,130,246,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.025) 1px, transparent 1px);
    background-size: 60px 60px;
}

.app-wrap, .app-container, .app-main, .main-content {
    position: relative;
    z-index: 1;
}

/* ── Header ── */
.main-heading {
    background: rgba(11, 15, 30, 0.92) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border-bottom: 1px solid var(--border-color) !important;
    box-shadow: 0 4px 30px rgba(0,0,0,0.3) !important;
    padding: 16px 0 !important;
}

.main-heading .page-icon img {
    border-radius: 14px !important;
    border: 2px solid rgba(59,130,246,0.2) !important;
    padding: 3px !important;
    background: rgba(59,130,246,0.06) !important;
}

.main-heading .page-title h2 {
    font-size: 22px !important;
    font-weight: 700 !important;
    letter-spacing: -0.5px !important;
    background: linear-gradient(135deg, #e2e8f0, #94a3b8) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
    color: transparent !important;
}

.main-heading .sub-heading {
    color: #3b82f6 !important;
    font-weight: 500 !important;
    letter-spacing: 2px !important;
    text-transform: uppercase !important;
    font-size: 11px !important;
}

.main-heading .right-actions span {
    color: var(--text-secondary) !important;
}

.main-heading .right-actions .btn-primary {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    border: none !important;
    border-radius: 10px !important;
    padding: 8px 12px !important;
    box-shadow: 0 4px 15px rgba(239,68,68,0.25) !important;
    transition: all 0.3s !important;
}

.main-heading .right-actions .btn-primary:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 6px 20px rgba(239,68,68,0.35) !important;
}

/* ── Cards ── */
.card {
    background: var(--bg-card) !important;
    backdrop-filter: blur(10px) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 16px !important;
    box-shadow: 0 4px 24px rgba(0,0,0,0.15) !important;
    color: var(--text-primary) !important;
    transition: border-color 0.3s, box-shadow 0.3s !important;
    overflow: hidden !important;
}

.card:hover {
    border-color: var(--border-hover) !important;
    box-shadow: 0 8px 40px rgba(59,130,246,0.08) !important;
}

.card-header, .card-head .card-header {
    background: rgba(59,130,246,0.04) !important;
    border-bottom: 1px solid var(--border-color) !important;
    padding: 16px 24px !important;
}

.card-header h5, .card-header h4, .card-header .card-title,
.card-title {
    color: var(--text-primary) !important;
    font-weight: 600 !important;
    font-size: 16px !important;
}

.card-body {
    padding: 24px !important;
    color: var(--text-secondary) !important;
}

.card-footer {
    background: transparent !important;
    border-top: 1px solid var(--border-color) !important;
}

/* ── Forms ── */
.form-control {
    background: var(--bg-input) !important;
    border: 1px solid rgba(51,65,85,0.5) !important;
    color: var(--text-primary) !important;
    border-radius: 10px !important;
    padding: 10px 14px !important;
    font-family: inherit !important;
    transition: all 0.3s !important;
}

.form-control:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.1) !important;
    background: rgba(15,23,42,0.8) !important;
    color: var(--text-primary) !important;
}

.form-control::placeholder {
    color: var(--text-muted) !important;
}

select.form-control {
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") !important;
    background-repeat: no-repeat !important;
    background-position: right 12px center !important;
    background-size: 16px !important;
    padding-right: 36px !important;
}

label, .form-label, .col-form-label {
    color: var(--text-secondary) !important;
    font-weight: 500 !important;
    font-size: 13px !important;
}

.form-text, .text-muted, small.text-muted, .form-control-feedback {
    color: var(--text-muted) !important;
}

.help-block, .form-text {
    color: var(--text-muted) !important;
    font-size: 12px !important;
}

/* ── Buttons ── */
.btn-primary, .btn-info {
    background: linear-gradient(135deg, #3b82f6, #6366f1) !important;
    border: none !important;
    border-radius: 10px !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(59,130,246,0.25) !important;
    transition: all 0.3s ease !important;
    color: #fff !important;
    padding: 10px 24px !important;
}

.btn-primary:hover, .btn-info:hover {
    transform: translateY(-1px) !important;
    box-shadow: 0 6px 25px rgba(59,130,246,0.35) !important;
}

.btn-success {
    background: linear-gradient(135deg, #22c55e, #16a34a) !important;
    border: none !important;
    border-radius: 10px !important;
    box-shadow: 0 4px 15px rgba(34,197,94,0.25) !important;
    color: #fff !important;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    border: none !important;
    border-radius: 10px !important;
    color: #fff !important;
}

.btn-outline-primary {
    color: var(--accent) !important;
    border-color: var(--accent) !important;
    background: transparent !important;
    border-radius: 10px !important;
}

.btn-outline-primary:hover {
    background: var(--accent-glow) !important;
    color: var(--accent) !important;
}

/* Quick-action blocks (Financials, Assignments, CPD on home) */
.btn-block, a.btn-block {
    border-radius: 12px !important;
    font-weight: 600 !important;
    letter-spacing: 0.3px !important;
    padding: 14px 20px !important;
    margin-bottom: 10px !important;
    transition: all 0.3s ease !important;
}

.btn-block:hover {
    transform: translateY(-2px) !important;
}

/* ── Alerts ── */
.alert-warning, .alert {
    background: rgba(245,158,11,0.1) !important;
    border: 1px solid rgba(245,158,11,0.2) !important;
    color: #fcd34d !important;
    border-radius: 12px !important;
}

.alert-success {
    background: rgba(34,197,94,0.1) !important;
    border: 1px solid rgba(34,197,94,0.2) !important;
    color: #86efac !important;
}

.alert-danger {
    background: rgba(239,68,68,0.1) !important;
    border: 1px solid rgba(239,68,68,0.2) !important;
    color: #fca5a5 !important;
}

.alert-info {
    background: rgba(59,130,246,0.1) !important;
    border: 1px solid rgba(59,130,246,0.2) !important;
    color: #93c5fd !important;
}

/* ── Tables ── */
.table {
    color: var(--text-secondary) !important;
}

.table thead th {
    background: rgba(59,130,246,0.06) !important;
    color: var(--text-primary) !important;
    border-bottom: 1px solid var(--border-color) !important;
    font-weight: 600 !important;
    font-size: 12px !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
}

.table td, .table th {
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
    padding: 12px 16px !important;
}

.table tbody tr {
    transition: background 0.2s !important;
}

.table tbody tr:hover {
    background: var(--accent-glow) !important;
}

.table-bordered {
    border-color: var(--border-color) !important;
}

/* ── Student info panels (home page) ── */
.info-stats .card,
.student-details {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
}

/* ── Headings ── */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary) !important;
}

p {
    color: var(--text-secondary);
}

strong, b {
    color: var(--text-primary);
}

/* ── Links ── */
a {
    color: var(--accent);
    transition: color 0.2s;
}

a:hover {
    color: #60a5fa;
    text-decoration: none;
}

/* ── Footer ── */
.main-footer {
    background: rgba(11,15,30,0.95) !important;
    border-top: 1px solid var(--border-color) !important;
    color: var(--text-muted) !important;
    font-size: 12px !important;
    backdrop-filter: blur(10px) !important;
}

/* ── Misc ── */
hr {
    border-color: var(--border-color) !important;
}

.border, .border-top, .border-bottom {
    border-color: var(--border-color) !important;
}

.bg-white, .bg-light {
    background: var(--bg-card) !important;
}

.text-dark {
    color: var(--text-primary) !important;
}

/* Invalid feedback */
.invalid-feedback, .is-invalid ~ .invalid-feedback {
    color: #fca5a5 !important;
    font-size: 12px !important;
}

.is-invalid {
    border-color: rgba(239,68,68,0.5) !important;
}

/* ── Pagination ── */
.page-link {
    background: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
    border-radius: 8px !important;
}

.page-item.active .page-link {
    background: var(--accent) !important;
    border-color: var(--accent) !important;
    color: #fff !important;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(100,116,139,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(100,116,139,0.5); }

/* ── Custom select2 ── */
.select2-container--default .select2-selection--single {
    background: var(--bg-input) !important;
    border-color: rgba(51,65,85,0.5) !important;
    border-radius: 10px !important;
}

.select2-container--default .select2-selection--single .select2-selection__rendered {
    color: var(--text-primary) !important;
}

.select2-dropdown {
    background: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
}