/* ============================================================
   InternHub — Global Stylesheet
   Dark navy theme with Bootstrap 5 enhancements
   ============================================================ */

/* ── CSS Variables ──────────────────────────────────────────── */
:root {
    --primary:        #6366f1;
    --primary-light:  #818cf8;
    --primary-dark:   #4338ca;
    --primary-glow:   rgba(99, 102, 241, 0.25);
    --accent:         #06b6d4;
    --success:        #10b981;
    --warning:        #f59e0b;
    --danger:         #ef4444;
    --info:           #3b82f6;

    --bg:             #0d1117;
    --bg-2:           #161b22;
    --card-bg:        #1a2332;
    --card-border:    rgba(99,102,241,0.15);
    --card-hover:     rgba(99,102,241,0.08);

    --text:           #e6edf3;
    --text-muted:     #8b949e;
    --text-subtle:    #6e7681;

    --navbar-h:       65px;
    --radius:         12px;
    --radius-sm:      8px;
    --transition:     all 0.2s ease;
}

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

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 { color: var(--text); font-weight: 700; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
p { color: var(--text-muted); margin-bottom: 0.5rem; }
hr { border-color: var(--card-border); opacity: 1; margin: 1.5rem 0; }

/* ── Navbar ─────────────────────────────────────────────────── */
#mainNavbar {
    background: rgba(13,17,23,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    height: var(--navbar-h);
    transition: var(--transition);
}

.brand-icon {
    width: 34px; height: 34px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; color: white;
    box-shadow: 0 0 12px var(--primary-glow);
}

.brand-text {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text);
}

.brand-accent { color: var(--primary-light); }

.nav-pill {
    color: var(--text-muted) !important;
    font-weight: 500;
    padding: 6px 12px !important;
    border-radius: var(--radius-sm) !important;
    transition: var(--transition);
    font-size: 0.875rem;
}

.nav-pill:hover,
.nav-pill.active {
    color: var(--text) !important;
    background: var(--card-hover) !important;
}

.nav-pill.active {
    color: var(--primary-light) !important;
    background: rgba(99,102,241,0.15) !important;
}

/* ── Main Content ───────────────────────────────────────────── */
.main-content {
    padding-top: var(--navbar-h);
    min-height: calc(100vh - 52px);
    padding-bottom: 2rem;
}

/* ── Page Header ────────────────────────────────────────────── */
.page-header {
    padding: 1.5rem 0 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--card-border);
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 0.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-header h1 i { color: var(--primary-light); }
.page-header p { color: var(--text-muted); font-size: 0.875rem; margin: 0; }

/* ── Stat Cards (Dashboard) ─────────────────────────────────── */
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--stat-color, var(--primary));
}

.stat-card:hover {
    border-color: var(--stat-color, var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.stat-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.06);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
    color: var(--stat-color, var(--primary));
}

.stat-body { flex: 1; min-width: 0; }
.stat-value {
    font-size: 2rem; font-weight: 800;
    line-height: 1; color: var(--text);
    letter-spacing: -1px;
}
.stat-label {
    font-size: 0.75rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.8px;
    color: var(--text-muted); margin-top: 3px;
}

/* ── Data Card (Tables) ──────────────────────────────────────── */
.data-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.data-card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0,0,0,0.15);
    gap: 0.75rem;
}

.data-card-header h5 {
    margin: 0; font-size: 0.95rem; font-weight: 700;
    color: var(--text); display: flex; align-items: center; gap: 6px;
}

.data-card-header h5 i { color: var(--primary-light); }

.data-card-body { padding: 0; }

/* ── Table ───────────────────────────────────────────────────── */
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.table-dark-custom {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table-dark-custom thead tr {
    background: rgba(0,0,0,0.2);
    border-bottom: 1px solid var(--card-border);
}

.table-dark-custom thead th {
    padding: 10px 16px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    white-space: nowrap;
}

.table-dark-custom tbody tr {
    border-bottom: 1px solid rgba(255,255,255,0.04);
    transition: background 0.15s;
}

.table-dark-custom tbody tr:hover { background: var(--card-hover); }
.table-dark-custom tbody tr:last-child { border-bottom: none; }

.table-dark-custom tbody td {
    padding: 12px 16px;
    vertical-align: middle;
    color: var(--text);
}

.row-overdue { background: rgba(239,68,68,0.05) !important; }
.row-overdue:hover { background: rgba(239,68,68,0.1) !important; }

/* ── Status Badges ───────────────────────────────────────────── */
.badge-status {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.badge-applied          { background: rgba(59,130,246,0.15);  color: #60a5fa; border: 1px solid rgba(59,130,246,0.3); }
.badge-oascheduled      { background: rgba(245,158,11,0.15);  color: #fbbf24; border: 1px solid rgba(245,158,11,0.3); }
.badge-oacompleted      { background: rgba(16,185,129,0.1);   color: #34d399; border: 1px solid rgba(16,185,129,0.2); }
.badge-interviewscheduled { background: rgba(139,92,246,0.15); color: #a78bfa; border: 1px solid rgba(139,92,246,0.3); }
.badge-selected         { background: rgba(16,185,129,0.2);   color: #10b981; border: 1px solid rgba(16,185,129,0.4); }
.badge-rejected         { background: rgba(239,68,68,0.15);   color: #f87171; border: 1px solid rgba(239,68,68,0.3); }

.badge-technical { background: rgba(59,130,246,0.15);  color: #60a5fa; border: 1px solid rgba(59,130,246,0.3); }
.badge-hr        { background: rgba(236,72,153,0.15);  color: #f472b6; border: 1px solid rgba(236,72,153,0.3); }
.badge-coding    { background: rgba(245,158,11,0.15);  color: #fbbf24; border: 1px solid rgba(245,158,11,0.3); }

.badge-high   { background: rgba(239,68,68,0.15);  color: #f87171; border: 1px solid rgba(239,68,68,0.3); }
.badge-medium { background: rgba(245,158,11,0.15); color: #fbbf24; border: 1px solid rgba(245,158,11,0.3); }
.badge-low    { background: rgba(16,185,129,0.15); color: #34d399; border: 1px solid rgba(16,185,129,0.3); }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn-primary-custom {
    display: inline-flex; align-items: center; gap: 6px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff !important;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600; font-size: 0.875rem;
    border: none; cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}

.btn-primary-custom:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(99,102,241,0.4);
    color: #fff !important;
}

.btn-outline-custom {
    display: inline-flex; align-items: center; gap: 6px;
    background: transparent;
    color: var(--text-muted) !important;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 500; font-size: 0.875rem;
    border: 1px solid var(--card-border); cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-outline-custom:hover {
    background: var(--card-hover);
    border-color: var(--primary-light);
    color: var(--text) !important;
}

.btn-danger-custom {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--danger);
    color: #fff !important;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600; font-size: 0.875rem;
    border: none; cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(239,68,68,0.3);
}

.btn-danger-custom:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(239,68,68,0.4);
}

/* ── Action Buttons (table row) ──────────────────────────────── */
.action-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; border-radius: 6px;
    font-size: 0.8rem; text-decoration: none;
    transition: var(--transition);
    border: 1px solid transparent;
}

.action-btn.view   { color: var(--accent);   background: rgba(6,182,212,0.1);  border-color: rgba(6,182,212,0.2); }
.action-btn.edit   { color: var(--warning);  background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.2); }
.action-btn.delete { color: var(--danger);   background: rgba(239,68,68,0.1);  border-color: rgba(239,68,68,0.2); }

.action-btn.view:hover   { background: rgba(6,182,212,0.25);  transform: scale(1.1); }
.action-btn.edit:hover   { background: rgba(245,158,11,0.25); transform: scale(1.1); }
.action-btn.delete:hover { background: rgba(239,68,68,0.25);  transform: scale(1.1); }

/* ── Form Card ───────────────────────────────────────────────── */
.form-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 780px;
}

.form-label {
    font-size: 0.8rem; font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.form-control, .form-select {
    background: rgba(0,0,0,0.25) !important;
    border: 1px solid rgba(255,255,255,0.1) !important;
    border-radius: var(--radius-sm) !important;
    color: var(--text) !important;
    padding: 10px 14px !important;
    font-size: 0.875rem !important;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    background: rgba(0,0,0,0.35) !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px var(--primary-glow) !important;
    outline: none;
}

.form-control::placeholder { color: var(--text-subtle) !important; }
.form-select option { background: var(--card-bg); color: var(--text); }

.text-danger { color: #f87171 !important; font-size: 0.8rem; margin-top: 3px; display: block; }

/* ── Detail Card ─────────────────────────────────────────────── */
.detail-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.detail-header {
    background: linear-gradient(135deg, var(--primary-dark), rgba(99,102,241,0.7));
    padding: 1.5rem;
    color: white;
}

.detail-body { padding: 1.5rem; }

.detail-field { margin-bottom: 1.25rem; }
.detail-field-label {
    font-size: 0.72rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.8px;
    color: var(--text-muted); margin-bottom: 4px;
}
.detail-field-value { color: var(--text); font-size: 0.9rem; }

/* ── Delete Card ─────────────────────────────────────────────── */
.delete-card {
    background: var(--card-bg);
    border: 1px solid rgba(239,68,68,0.3);
    border-radius: var(--radius);
    overflow: hidden;
    max-width: 520px;
}

.delete-header {
    background: linear-gradient(135deg, rgba(127,29,29,0.8), rgba(239,68,68,0.4));
    padding: 1.5rem;
    text-align: center;
    color: white;
    border-bottom: 1px solid rgba(239,68,68,0.3);
}

/* ── Empty State ─────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state i { font-size: 2.5rem; display: block; margin-bottom: 0.75rem; opacity: 0.4; }
.empty-state p { font-size: 0.9rem; margin-bottom: 0.75rem; }

/* ── Progress / Alert Strips ─────────────────────────────────── */
.alert-strip {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-strip.info    { background: rgba(59,130,246,0.1);  border: 1px solid rgba(59,130,246,0.2);  color: #93c5fd; }
.alert-strip.success { background: rgba(16,185,129,0.1);  border: 1px solid rgba(16,185,129,0.2);  color: #6ee7b7; }
.alert-strip.warning { background: rgba(245,158,11,0.1);  border: 1px solid rgba(245,158,11,0.2);  color: #fde68a; }
.alert-strip.danger  { background: rgba(239,68,68,0.1);   border: 1px solid rgba(239,68,68,0.2);   color: #fca5a5; }

/* ── Footer ──────────────────────────────────────────────────── */
.footer-bar {
    background: var(--bg-2);
    border-top: 1px solid var(--card-border);
    font-size: 0.8rem;
}

/* ── Search & Filter Bar ─────────────────────────────────────── */
.search-bar {
    display: flex; align-items: center; gap: 0.5rem;
    flex-wrap: wrap;
}

.search-bar .form-control,
.search-bar .form-select {
    min-width: 160px;
    padding: 7px 12px !important;
}

/* ── Responsive Utilities ────────────────────────────────────── */
@media (max-width: 768px) {
    .page-header h1 { font-size: 1.3rem; }
    .stat-value { font-size: 1.6rem; }
    .form-card { padding: 1.25rem; }
    .data-card-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 576px) {
    .brand-text { display: none; }
    .main-content { padding-top: calc(var(--navbar-h) + 4px); }
}

/* ── Section Divider ─────────────────────────────────────────── */
.section-divider { border-color: var(--card-border); opacity: 1; margin: 1.5rem 0; }

/* ── Bootstrap overrides ─────────────────────────────────────── */
.fw-500 { font-weight: 500; }
.text-success-custom { color: var(--success) !important; }
.text-danger-custom  { color: var(--danger)  !important; }
.text-warning-custom { color: var(--warning) !important; }