/* ============================================================
   assets/css/style.css  —  PCRS Custom Styles
   Theme: Deep Navy + Gold — Professional Academic
   ============================================================ */

/* ── Design Tokens ──────────────────────────────────────── */
:root {
    --navy:        #0d2a4e;
    --navy-dark:   #081b34;
    --navy-mid:    #163a65;
    --navy-light:  #1e4f8c;
    --gold:        #c9a84c;
    --gold-light:  #f0cc6e;
    --gold-pale:   #fdf3d8;
    --teal:        #1abc9c;
    --danger-soft: #fdecea;
    --success-soft:#eafaf1;
    --warn-soft:   #fef9e7;
    --body-bg:     #f4f7fc;
    --card-bg:     #ffffff;
    --text-main:   #1a2e4a;
    --text-muted:  #6c7a8d;
    --border:      #dde3ed;
    --radius-sm:   6px;
    --radius:      12px;
    --radius-lg:   18px;
    --shadow-sm:   0 2px 8px rgba(13,42,78,.08);
    --shadow:      0 4px 20px rgba(13,42,78,.12);
    --shadow-lg:   0 8px 40px rgba(13,42,78,.16);
    --font-main:   'DM Sans', sans-serif;
    --font-display:'DM Serif Display', serif;
    --transition:  .2s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    background: var(--body-bg);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--navy-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--gold); }

h1,h2,h3,h4,h5,h6 { font-family: var(--font-main); font-weight: 700; color: var(--navy); }

/* ── Navbar ──────────────────────────────────────────────── */
.pcrs-navbar {
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 60%, var(--navy-mid) 100%);
    border-bottom: 3px solid var(--gold);
    padding: .6rem 0;
    box-shadow: 0 2px 16px rgba(0,0,0,.25);
}

.pcrs-logo-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: var(--navy-dark);
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(201,168,76,.4);
}
.pcrs-logo-icon--sm { width: 28px; height: 28px; font-size: .85rem; }

.pcrs-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.brand-short {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--gold-light);
    letter-spacing: .05em;
}
.brand-long {
    font-size: .65rem;
    color: rgba(255,255,255,.6);
    letter-spacing: .04em;
    text-transform: uppercase;
}

.navbar-toggler { border: none; padding: 4px; }
.navbar-toggler:focus { box-shadow: none; }

/* Nav links */
.pcrs-navbar .nav-link {
    color: rgba(255,255,255,.75) !important;
    font-weight: 500;
    font-size: .88rem;
    padding: .45rem .9rem !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.pcrs-navbar .nav-link:hover,
.pcrs-navbar .nav-link.active {
    background: rgba(201,168,76,.15);
    color: var(--gold-light) !important;
}
.pcrs-navbar .nav-link.active {
    background: rgba(201,168,76,.22);
    border-bottom: 2px solid var(--gold);
}

/* User button */
.pcrs-user-btn {
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: var(--radius);
    padding: .4rem .8rem;
    color: #fff;
    transition: all var(--transition);
}
.pcrs-user-btn:hover, .pcrs-user-btn:focus {
    background: rgba(201,168,76,.2);
    border-color: var(--gold);
    color: #fff;
    box-shadow: none;
}
.pcrs-user-btn::after { margin-left: .4rem; }

.user-avatar {
    width: 34px; height: 34px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: .85rem;
    color: var(--navy-dark);
    flex-shrink: 0;
}
.user-name { font-weight: 600; font-size: .85rem; line-height: 1.2; }
.user-role { font-size: .72rem; color: rgba(255,255,255,.55); }

/* Dropdown */
.pcrs-dropdown {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    overflow: hidden;
    padding: 0;
}
.pcrs-dropdown .dropdown-item {
    padding: .65rem 1rem;
    font-size: .88rem;
    transition: background var(--transition);
}
.pcrs-dropdown .dropdown-item:hover { background: var(--gold-pale); }

/* ── Main Content Area ───────────────────────────────────── */
.pcrs-main {
    flex: 1;
    padding: 2rem 0 3rem;
}

/* ── Footer ──────────────────────────────────────────────── */
.pcrs-footer {
    background: var(--navy-dark);
    border-top: 3px solid var(--gold);
    color: rgba(255,255,255,.7);
}
.pcrs-footer .pcrs-logo-icon { opacity: .8; }

/* ── Cards ───────────────────────────────────────────────── */
.pcrs-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), transform var(--transition);
}
.pcrs-card:hover { box-shadow: var(--shadow); }

.card-header-navy {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
    color: #fff;
    border-radius: var(--radius) var(--radius) 0 0 !important;
    border: none;
    padding: 1.1rem 1.5rem;
}
.card-header-navy h5, .card-header-navy h6 { color: #fff; margin: 0; }

/* ── Stat Cards ──────────────────────────────────────────── */
.stat-card {
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
    transition: all var(--transition);
    overflow: hidden;
    position: relative;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 100px; height: 100px;
    border-radius: 50%;
    opacity: .07;
    transform: translate(30px,-30px);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.stat-card.navy   { background: linear-gradient(135deg,var(--navy),var(--navy-mid)); color:#fff; }
.stat-card.gold   { background: linear-gradient(135deg,#c9a84c,#f0cc6e); color:var(--navy-dark); }
.stat-card.teal   { background: linear-gradient(135deg,#1abc9c,#16a085); color:#fff; }
.stat-card.orange { background: linear-gradient(135deg,#e67e22,#d35400); color:#fff; }

.stat-card .stat-icon {
    width: 56px; height: 56px;
    background: rgba(255,255,255,.18);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}
.stat-card .stat-num   { font-size: 2rem; font-weight: 800; line-height: 1; }
.stat-card .stat-label { font-size: .8rem; opacity: .85; margin-top: .2rem; }

/* ── Course Cards ────────────────────────────────────────── */
.course-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.3rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}
.course-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }

.course-code-badge {
    display: inline-block;
    background: var(--navy);
    color: var(--gold-light);
    font-size: .72rem;
    font-weight: 700;
    padding: .2rem .65rem;
    border-radius: 20px;
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-bottom: .5rem;
}
.course-card h6 {
    font-size: .95rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: .4rem;
    flex: 1;
}
.course-card .course-meta {
    font-size: .78rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: .2rem;
    margin-bottom: .8rem;
}
.course-card .course-meta i { color: var(--gold); }

/* Capacity bar */
.capacity-bar {
    height: 6px;
    background: var(--border);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: .3rem;
}
.capacity-bar-fill {
    height: 100%;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--teal), #0fa37b);
    transition: width .4s ease;
}
.capacity-bar-fill.warn  { background: linear-gradient(90deg,#f39c12,#e67e22); }
.capacity-bar-fill.full  { background: linear-gradient(90deg,#e74c3c,#c0392b); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn-navy {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
    color: #fff;
    border: none;
    font-weight: 600;
    padding: .55rem 1.3rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(13,42,78,.2);
}
.btn-navy:hover { background: linear-gradient(135deg,var(--navy-dark),var(--navy)); color:#fff; transform:translateY(-1px); box-shadow:var(--shadow); }

.btn-gold {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    color: var(--navy-dark);
    border: none;
    font-weight: 700;
    padding: .55rem 1.3rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(201,168,76,.3);
}
.btn-gold:hover { filter: brightness(1.05); color:var(--navy-dark); transform:translateY(-1px); box-shadow:var(--shadow); }

.btn-outline-navy {
    background: transparent;
    color: var(--navy);
    border: 2px solid var(--navy);
    font-weight: 600;
    padding: .5rem 1.2rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.btn-outline-navy:hover { background: var(--navy); color:#fff; }

/* ── Forms ───────────────────────────────────────────────── */
.pcrs-form-control {
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: .65rem 1rem;
    font-size: .9rem;
    background: #fff;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.pcrs-form-control:focus {
    border-color: var(--navy-light);
    box-shadow: 0 0 0 3px rgba(30,79,140,.12);
    outline: none;
}
.pcrs-form-label {
    font-weight: 600;
    font-size: .85rem;
    color: var(--navy);
    margin-bottom: .4rem;
}

/* ── Tables ──────────────────────────────────────────────── */
.pcrs-table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
    font-size: .88rem;
}
.pcrs-table thead th {
    background: var(--navy);
    color: rgba(255,255,255,.9);
    font-weight: 600;
    padding: .85rem 1.1rem;
    border: none;
    font-size: .82rem;
    letter-spacing: .03em;
    text-transform: uppercase;
}
.pcrs-table thead th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.pcrs-table thead th:last-child  { border-radius: 0 var(--radius-sm) 0 0; }
.pcrs-table tbody tr {
    transition: background var(--transition);
    border-bottom: 1px solid var(--border);
}
.pcrs-table tbody tr:last-child { border-bottom: none; }
.pcrs-table tbody tr:hover { background: var(--gold-pale); }
.pcrs-table tbody td { padding: .85rem 1.1rem; vertical-align: middle; }

/* ── Badges ──────────────────────────────────────────────── */
.badge-open      { background: #eafaf1; color: #1a7a4a; border:1px solid #a8e6c3; }
.badge-closed    { background: #fdecea; color: #a93226; border:1px solid #f5b7b1; }
.badge-cancelled { background: #f5f5f5; color: #7f8c8d; border:1px solid #d5d8dc; }
.badge-admin     { background: var(--navy); color: var(--gold-light); }
.badge-student   { background: #e8f0fe; color: #1a73e8; }

/* ── Alerts ──────────────────────────────────────────────── */
.pcrs-alert {
    border-radius: var(--radius-sm);
    padding: .85rem 1.2rem;
    font-size: .9rem;
    border-left: 4px solid;
    margin-bottom: 1.2rem;
}
.pcrs-alert.success { background:#eafaf1; border-color:#27ae60; color:#1a5e33; }
.pcrs-alert.error   { background:#fdecea; border-color:#e74c3c; color:#8b1a14; }
.pcrs-alert.warning { background:var(--warn-soft); border-color:#f39c12; color:#7d5a00; }
.pcrs-alert.info    { background:#e8f4fd; border-color:#3498db; color:#1a4971; }

/* ── Auth Pages ──────────────────────────────────────────── */
.auth-wrapper {
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(201,168,76,.12) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(30,79,140,.18) 0%, transparent 60%),
        linear-gradient(160deg, var(--navy-dark) 0%, var(--navy) 50%, var(--navy-mid) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}
.auth-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    overflow: hidden;
}
.auth-header {
    background: linear-gradient(135deg, var(--navy-dark), var(--navy));
    padding: 2rem;
    text-align: center;
    border-bottom: 3px solid var(--gold);
}
.auth-header .auth-logo {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem;
    color: var(--navy-dark);
    margin: 0 auto 1rem;
    box-shadow: 0 4px 16px rgba(201,168,76,.4);
}
.auth-header h2 {
    color: #fff;
    font-size: 1.4rem;
    margin-bottom: .2rem;
}
.auth-header p { color: rgba(255,255,255,.6); font-size: .85rem; margin: 0; }
.auth-body { padding: 2rem; }

/* ── Page Header ─────────────────────────────────────────── */
.page-header {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
    color: #fff;
    padding: 2rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}
.page-header::after {
    content: '';
    position: absolute;
    right: -20px; top: -20px;
    width: 180px; height: 180px;
    background: rgba(201,168,76,.1);
    border-radius: 50%;
}
.page-header h1, .page-header h2 { color:#fff; margin: 0 0 .2rem; font-size: 1.6rem; }
.page-header p { color: rgba(255,255,255,.7); margin: 0; font-size: .9rem; }
.page-header .page-header-icon {
    position: absolute;
    right: 2rem; top: 50%;
    transform: translateY(-50%);
    font-size: 4rem;
    color: rgba(201,168,76,.2);
    z-index: 0;
}

/* ── Search Box ──────────────────────────────────────────── */
.search-box {
    position: relative;
}
.search-box .search-icon {
    position: absolute;
    left: 1rem; top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}
.search-box input {
    padding-left: 2.8rem;
}

/* ── Loading Spinner ─────────────────────────────────────── */
.pcrs-spinner {
    width: 22px; height: 22px;
    border: 3px solid var(--border);
    border-top-color: var(--navy);
    border-radius: 50%;
    animation: spin .7s linear infinite;
    display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Registered Tag ──────────────────────────────────────── */
.registered-tag {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    background: #eafaf1;
    color: #1a7a4a;
    border: 1px solid #a8e6c3;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 600;
    padding: .2rem .65rem;
}

/* ── Empty State ─────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-muted);
}
.empty-state i { font-size: 3rem; color: var(--border); margin-bottom: 1rem; }
.empty-state h6 { color: var(--text-main); margin-bottom: .4rem; }

/* ── Responsive Tweaks ───────────────────────────────────── */
@media (max-width: 768px) {
    .stat-card { padding: 1rem; }
    .stat-card .stat-num { font-size: 1.5rem; }
    .page-header { padding: 1.3rem; }
    .page-header .page-header-icon { display: none; }
    .pcrs-table { font-size: .8rem; }
}

/* ── Utility ─────────────────────────────────────────────── */
.fw-700 { font-weight: 700; }
.text-navy { color: var(--navy) !important; }
.text-gold  { color: var(--gold) !important; }
.bg-navy    { background: var(--navy) !important; }
.divider    { height: 1px; background: var(--border); margin: 1.5rem 0; }