/* ═══════════════════════════════════════════════════════════════
   NIT Student Management Portal — Global Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ── Google Fonts already loaded in head.ejs ─────────────────── */

/* ── CSS Custom Properties ───────────────────────────────────── */
:root {
    --primary:        #1a3c6e;
    --primary-light:  #2557a7;
    --primary-dark:   #0f2447;
    --accent:         #3b82f6;
    --accent-light:   #60a5fa;
    --success:        #16a34a;
    --warning:        #d97706;
    --danger:         #dc2626;
    --sidebar-width:  260px;
    --topbar-height:  60px;
    --shadow-sm:      0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md:      0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg:      0 10px 25px rgba(0,0,0,.1);
    --radius:         12px;
    --radius-sm:      8px;
    --transition:     all .25s ease;
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: #f0f4f8;
    color: #1e293b;
    margin: 0;
    min-height: 100vh;
}

/* ── Typography ──────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 { font-weight: 700; }

/* ═══════════════════════════════════════════════════════════════
   AUTH PAGES (Login / Register)
   ═══════════════════════════════════════════════════════════════ */
.auth-page {
    min-height: 100vh;
    display: flex;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

.auth-left {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem;
    color: #fff;
    text-align: center;
}

.auth-left .brand-logo {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}

.auth-left h1 { font-size: 2rem; font-weight: 800; margin-bottom: .5rem; }
.auth-left p  { font-size: 1rem; opacity: .85; max-width: 320px; }

.auth-features { margin-top: 2.5rem; text-align: left; }
.auth-feature-item {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: .85rem;
    font-size: .9rem;
    opacity: .9;
}
.auth-feature-item i { font-size: 1.1rem; color: #93c5fd; }

.auth-right {
    width: 440px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    padding: 2.5rem 2rem;
    overflow-y: auto;
}

.auth-card { width: 100%; max-width: 380px; }
.auth-card .card-header-text {
    text-align: center;
    margin-bottom: 1.75rem;
}
.auth-card .card-header-text h2 {
    color: var(--primary);
    font-size: 1.6rem;
    margin-bottom: .25rem;
}
.auth-card .card-header-text p { color: #64748b; font-size: .9rem; }

/* ── Form Controls ───────────────────────────────────────────── */
.form-label {
    font-weight: 600;
    font-size: .85rem;
    color: #374151;
    margin-bottom: .35rem;
}

.form-control, .form-select {
    border: 1.5px solid #d1d5db;
    border-radius: var(--radius-sm);
    padding: .6rem .9rem;
    font-size: .9rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,.15);
    outline: none;
}

.input-group-text {
    background: #f3f4f6;
    border: 1.5px solid #d1d5db;
    border-right: none;
    color: #6b7280;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn-primary-custom {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: .7rem 1.5rem;
    font-weight: 600;
    font-size: .95rem;
    transition: var(--transition);
    width: 100%;
}
.btn-primary-custom:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26,60,110,.35);
    color: #fff;
}

/* ═══════════════════════════════════════════════════════════════
   SIDEBAR LAYOUT
   ═══════════════════════════════════════════════════════════════ */
.layout-wrapper { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 1000;
    transition: var(--transition);
    overflow-y: auto;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: 1.5rem 1.25rem 1rem;
    font-size: 1.15rem;
    font-weight: 800;
    border-bottom: 1px solid rgba(255,255,255,.1);
    letter-spacing: -.3px;
}
.sidebar-brand i { font-size: 1.6rem; color: #93c5fd; }

.sidebar-label {
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: rgba(255,255,255,.45);
    padding: 1.25rem 1.25rem .5rem;
}

.sidebar-nav { flex: 1; padding: .5rem .75rem; }

.sidebar-link {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .7rem 1rem;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,.8);
    text-decoration: none;
    font-size: .9rem;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: .25rem;
}
.sidebar-link i { font-size: 1.1rem; width: 20px; text-align: center; }
.sidebar-link:hover {
    background: rgba(255,255,255,.12);
    color: #fff;
    transform: translateX(3px);
}
.sidebar-link.active {
    background: rgba(255,255,255,.2);
    color: #fff;
    font-weight: 600;
}

.sidebar-footer {
    padding: 1rem 1.25rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,.1);
}
.sidebar-user {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .85rem;
    font-weight: 600;
    margin-bottom: .5rem;
    color: rgba(255,255,255,.9);
}
.sidebar-user i { font-size: 1.2rem; }

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

.topbar {
    height: var(--topbar-height);
    background: #fff;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    padding: 0 1.75rem;
    position: sticky;
    top: 0;
    z-index: 100;
}
.topbar h4 { margin: 0; font-size: 1.05rem; color: var(--primary); }

.page-content {
    flex: 1;
    padding: 2rem 1.75rem;
}

/* ═══════════════════════════════════════════════════════════════
   STATS CARDS
   ═══════════════════════════════════════════════════════════════ */
.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: var(--transition);
    border-left: 4px solid transparent;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.stat-card.blue   { border-left-color: var(--accent); }
.stat-card.yellow { border-left-color: #f59e0b; }
.stat-card.green  { border-left-color: #10b981; }
.stat-card.red    { border-left-color: #ef4444; }

.stat-icon {
    width: 56px; height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.stat-card.blue   .stat-icon { background: #eff6ff; color: var(--accent); }
.stat-card.yellow .stat-icon { background: #fffbeb; color: #d97706; }
.stat-card.green  .stat-icon { background: #ecfdf5; color: #10b981; }
.stat-card.red    .stat-icon { background: #fef2f2; color: #ef4444; }

.stat-info .stat-value {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    color: var(--primary-dark);
}
.stat-info .stat-label {
    font-size: .8rem;
    font-weight: 600;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-top: .25rem;
}

/* ═══════════════════════════════════════════════════════════════
   DATA TABLE CARD
   ═══════════════════════════════════════════════════════════════ */
.data-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}
.data-card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.data-card-header h5 { margin: 0; color: var(--primary); font-size: 1rem; }

.table-responsive { overflow-x: auto; }

.data-table { margin: 0; }
.data-table thead th {
    background: #f8fafc;
    color: #374151;
    font-size: .78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .6px;
    padding: .85rem 1.25rem;
    border-bottom: 1px solid #e5e7eb;
    white-space: nowrap;
}
.data-table tbody td {
    padding: .85rem 1.25rem;
    vertical-align: middle;
    font-size: .875rem;
    border-bottom: 1px solid #f1f5f9;
    color: #374151;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: #f8fafc; }

/* ── Status Badges ───────────────────────────────────────────── */
.badge-status {
    padding: .35em .75em;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
    text-transform: capitalize;
}
.badge-pending  { background: #fef9c3; color: #854d0e; }
.badge-approved { background: #dcfce7; color: #166534; }
.badge-rejected { background: #fee2e2; color: #991b1b; }

/* ── Action Buttons ──────────────────────────────────────────── */
.btn-action {
    padding: .3rem .65rem;
    border-radius: 6px;
    font-size: .78rem;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.btn-view    { background:#eff6ff; color:#1d4ed8; }
.btn-view:hover    { background:#dbeafe; color:#1e40af; }
.btn-approve { background:#dcfce7; color:#15803d; }
.btn-approve:hover { background:#bbf7d0; color:#166534; }
.btn-reject  { background:#fee2e2; color:#b91c1c; }
.btn-reject:hover  { background:#fecaca; color:#991b1b; }

/* ═══════════════════════════════════════════════════════════════
   STUDENT DETAIL / PROFILE CARDS
   ═══════════════════════════════════════════════════════════════ */
.detail-section {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    overflow: hidden;
}
.detail-section-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: .6rem;
}
.detail-section-header h5 { margin: 0; font-size: .95rem; }
.detail-body { padding: 1.5rem; }

.detail-row {
    display: flex;
    padding: .6rem 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: .875rem;
}
.detail-row:last-child { border-bottom: none; }
.detail-label {
    width: 200px;
    flex-shrink: 0;
    font-weight: 600;
    color: #6b7280;
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .4px;
}
.detail-value { color: #1e293b; font-weight: 500; }

/* ── Student Dashboard Welcome Card ──────────────────────────── */
.welcome-card {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
    color: #fff;
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}
.welcome-card::before {
    content: '';
    position: absolute;
    top: -50px; right: -50px;
    width: 200px; height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,.05);
}
.welcome-card::after {
    content: '';
    position: absolute;
    bottom: -80px; right: 60px;
    width: 250px; height: 250px;
    border-radius: 50%;
    background: rgba(255,255,255,.05);
}
.welcome-card h2 { font-size: 1.6rem; margin-bottom: .25rem; }
.welcome-card p  { opacity: .85; margin-bottom: 0; }
.welcome-badge {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 999px;
    padding: .3rem .85rem;
    font-size: .8rem;
    font-weight: 600;
    margin-top: .75rem;
}

/* ── Results Coming Soon ─────────────────────────────────────── */
.coming-soon-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 4rem 2rem;
    text-align: center;
}
.coming-soon-icon {
    font-size: 4rem;
    color: #cbd5e1;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.coming-soon-card h3 { color: var(--primary); margin-bottom: .5rem; }
.coming-soon-card p  { color: #6b7280; max-width: 400px; margin: 0 auto; }

/* ═══════════════════════════════════════════════════════════════
   REGISTRATION PAGE
   ═══════════════════════════════════════════════════════════════ */
.register-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #f0f4f8 0%, #e8edf5 100%);
    padding: 2rem 0;
}

.register-header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    color: #fff;
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 2rem;
    text-align: center;
}
.register-header h1 { font-size: 1.7rem; margin-bottom: .25rem; }
.register-header p  { opacity: .85; margin: 0; }

.register-form-card {
    background: #fff;
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
}

.form-section-title {
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    padding: .5rem 0;
    border-bottom: 2px solid var(--accent);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: .5rem;
}

/* ═══════════════════════════════════════════════════════════════
   SUCCESS PAGE
   ═══════════════════════════════════════════════════════════════ */
.success-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
}
.success-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 3rem;
    max-width: 520px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: slideUp .5s ease;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
.success-icon {
    font-size: 4rem;
    color: #16a34a;
    margin-bottom: 1rem;
    animation: bounceIn .6s ease;
}
@keyframes bounceIn {
    0%   { transform: scale(0); }
    60%  { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════ */
.app-footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,.65);
    text-align: center;
    padding: 1rem;
    font-size: .8rem;
    margin-top: auto;
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 991px) {
    .auth-left { display: none; }
    .auth-right { width: 100%; }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .detail-label { width: 130px; font-size: .75rem; }
    .page-content { padding: 1.25rem 1rem; }
    .topbar { padding: 0 1rem; }
}

/* ── Utility ─────────────────────────────────────────────────── */
.fw-600 { font-weight: 600 !important; }
.flex-1 { flex: 1; }