/* ============================================================
   admin/assets/css/admin.css
   Let Me Prove — Admin Panel
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --admin-bg:        #0f1117;
    --admin-sidebar:   #13151c;
    --admin-card:      #1a1d27;
    --admin-border:    rgba(255,255,255,0.07);
    --admin-hover:     rgba(255,255,255,0.04);
    --brand:           #cf333e;
    --brand-soft:      rgba(207,51,62,0.12);
    --brand-border:    rgba(207,51,62,0.25);
    --text-primary:    #f1f3f9;
    --text-secondary:  rgba(255,255,255,0.5);
    --text-muted:      rgba(255,255,255,0.25);
    --success:         #10b981;
    --success-soft:    rgba(16,185,129,0.12);
    --warning:         #f59e0b;
    --warning-soft:    rgba(245,158,11,0.12);
    --danger:          #ef4444;
    --danger-soft:     rgba(239,68,68,0.12);
    --radius:          14px;
    --radius-sm:       10px;
    --sidebar-width:   260px;
    --transition:      all 0.2s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', 'Segoe UI', sans-serif;
    background: var(--admin-bg);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ─── LAYOUT ─────────────────────────────────────────────── */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* ─── SIDEBAR ────────────────────────────────────────────── */
.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--admin-sidebar);
    border-right: 1px solid var(--admin-border);
    position: fixed;
    height: 100vh;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: var(--transition);
    overflow-y: auto;
    overflow-x: hidden;
}

.admin-sidebar-header {
    padding: 22px 20px;
    border-bottom: 1px solid var(--admin-border);
    flex-shrink: 0;
}

.admin-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-logo img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 8px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.admin-logo-title {
    display: block;
    font-weight: 800;
    font-size: 0.95rem;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.admin-logo-sub {
    display: block;
    font-size: 0.7rem;
    color: var(--brand);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-top: 1px;
}

/* ─── NAV ────────────────────────────────────────────────── */
.admin-nav {
    padding: 16px 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.admin-nav-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.admin-nav-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0 10px;
    margin-bottom: 4px;
}

.admin-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 600;
    transition: var(--transition);
}

.admin-nav-item:hover {
    background: var(--admin-hover);
    color: var(--text-primary);
}

.admin-nav-item.active {
    background: var(--brand-soft);
    color: white;
    border: 1px solid var(--brand-border);
}

.nav-icon { font-size: 1rem; width: 20px; text-align: center; flex-shrink: 0; }

/* ─── SIDEBAR FOOTER ─────────────────────────────────────── */
.admin-sidebar-footer {
    padding: 16px 16px 20px;
    border-top: 1px solid var(--admin-border);
    flex-shrink: 0;
}

.admin-user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.admin-avatar {
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: var(--brand);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
}

.admin-user-name {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
}

.admin-user-role {
    font-size: 0.7rem;
    color: var(--brand);
    font-weight: 600;
    text-transform: capitalize;
}

.admin-logout-btn {
    display: block;
    width: 100%;
    padding: 9px;
    background: rgba(239,68,68,0.1);
    color: #fca5a5;
    border: 1px solid rgba(239,68,68,0.2);
    border-radius: var(--radius-sm);
    text-align: center;
    text-decoration: none;
    font-size: 0.84rem;
    font-weight: 700;
    transition: var(--transition);
}

.admin-logout-btn:hover {
    background: rgba(239,68,68,0.2);
    border-color: rgba(239,68,68,0.4);
}

/* ─── MAIN CONTENT ───────────────────────────────────────── */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ─── TOP BAR ────────────────────────────────────────────── */
.admin-topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: rgba(15,17,23,0.9);
    border-bottom: 1px solid var(--admin-border);
    backdrop-filter: blur(20px);
    gap: 16px;
}

.admin-topbar-left h1 {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.admin-topbar-left p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.admin-topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.menu-toggle-admin {
    display: none;
    background: var(--admin-card);
    border: 1px solid var(--admin-border);
    border-radius: 8px;
    width: 38px;
    height: 38px;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/* ─── PAGE CONTENT ───────────────────────────────────────── */
.admin-content {
    padding: 28px 32px;
    flex: 1;
}

/* ─── STAT CARDS ─────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card-admin {
    background: var(--admin-card);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    padding: 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: var(--transition);
}

.stat-card-admin:hover {
    border-color: rgba(255,255,255,0.12);
    transform: translateY(-2px);
}

.stat-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.stat-card-icon.blue    { background: rgba(59,130,246,0.12);  }
.stat-card-icon.green   { background: var(--success-soft);    }
.stat-card-icon.orange  { background: var(--warning-soft);    }
.stat-card-icon.red     { background: var(--brand-soft);      }

.stat-card-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.stat-card-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card-change {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 20px;
    width: fit-content;
}

.change-up   { background: var(--success-soft); color: #6ee7b7; }
.change-down { background: var(--danger-soft);  color: #fca5a5; }

/* ─── CARDS ──────────────────────────────────────────────── */
.admin-card {
    background: var(--admin-card);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.admin-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--admin-border);
    flex-wrap: wrap;
    gap: 12px;
}

.admin-card-header h2 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.admin-card-body { padding: 24px; }

/* ─── TABLE ──────────────────────────────────────────────── */
.admin-table-wrapper {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.86rem;
}

.admin-table th {
    padding: 12px 16px;
    text-align: left;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.7px;
    border-bottom: 1px solid var(--admin-border);
    white-space: nowrap;
    background: rgba(255,255,255,0.02);
}

.admin-table td {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    color: var(--text-secondary);
    vertical-align: middle;
}

.admin-table tbody tr:hover td {
    background: var(--admin-hover);
    color: var(--text-primary);
}

.admin-table tbody tr:last-child td { border-bottom: none; }

/* ─── BADGES ─────────────────────────────────────────────── */
.badge-admin {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    white-space: nowrap;
}

.badge-active   { background: var(--success-soft); color: #6ee7b7; border: 1px solid rgba(16,185,129,0.2); }
.badge-inactive { background: var(--danger-soft);  color: #fca5a5; border: 1px solid rgba(239,68,68,0.2); }
.badge-pending  { background: var(--warning-soft); color: #fcd34d; border: 1px solid rgba(245,158,11,0.2); }
.badge-paid     { background: var(--success-soft); color: #6ee7b7; border: 1px solid rgba(16,185,129,0.2); }

/* ─── BUTTONS ────────────────────────────────────────────── */
.btn-admin {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.84rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    border: none;
    font-family: inherit;
    white-space: nowrap;
}

.btn-admin-primary {
    background: var(--brand);
    color: white;
}

.btn-admin-primary:hover {
    background: #b82c36;
    transform: translateY(-1px);
}

.btn-admin-secondary {
    background: rgba(255,255,255,0.06);
    color: var(--text-primary);
    border: 1px solid var(--admin-border);
}

.btn-admin-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.15);
}

.btn-admin-success {
    background: var(--success-soft);
    color: #6ee7b7;
    border: 1px solid rgba(16,185,129,0.2);
}

.btn-admin-danger {
    background: var(--danger-soft);
    color: #fca5a5;
    border: 1px solid rgba(239,68,68,0.2);
}

.btn-admin-danger:hover {
    background: rgba(239,68,68,0.2);
}

.btn-admin-sm {
    padding: 6px 12px;
    font-size: 0.78rem;
}

/* ─── FORMS ──────────────────────────────────────────────── */
.admin-form-group {
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.admin-form-group label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.admin-form-group input,
.admin-form-group select,
.admin-form-group textarea {
    width: 100%;
    padding: 11px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border 0.2s, box-shadow 0.2s;
    font-family: inherit;
}

.admin-form-group input:focus,
.admin-form-group select:focus,
.admin-form-group textarea:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(207,51,62,0.12);
    background: rgba(255,255,255,0.07);
}

.admin-form-group textarea { resize: vertical; min-height: 100px; }

.admin-form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.admin-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ─── MODAL ──────────────────────────────────────────────── */
.admin-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    padding: 20px;
}

.admin-modal-overlay.active {
    display: flex;
}

.admin-modal {
    background: var(--admin-card);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 32px 80px rgba(0,0,0,0.5);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to   { opacity: 1; transform: scale(1)    translateY(0);    }
}

.admin-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--admin-border);
}

.admin-modal-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: var(--transition);
    line-height: 1;
}

.modal-close:hover {
    background: var(--admin-hover);
    color: var(--text-primary);
}

.admin-modal-body { padding: 24px; }

.admin-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--admin-border);
}

/* ─── SEARCH + FILTER BAR ────────────────────────────────── */
.admin-filter-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 20px;
}

.admin-search {
    flex: 1;
    min-width: 200px;
    padding: 10px 14px;
    background: var(--admin-card);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.88rem;
    outline: none;
    font-family: inherit;
    transition: border 0.2s;
}

.admin-search:focus { border-color: var(--brand); }
.admin-search::placeholder { color: var(--text-muted); }

/* ─── ALERT ──────────────────────────────────────────────── */
.admin-alert {
    padding: 13px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-alert-success {
    background: var(--success-soft);
    color: #6ee7b7;
    border: 1px solid rgba(16,185,129,0.2);
}

.admin-alert-error {
    background: var(--danger-soft);
    color: #fca5a5;
    border: 1px solid rgba(239,68,68,0.2);
}

/* ─── EMPTY STATE ────────────────────────────────────────── */
.admin-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.admin-empty p { font-size: 0.9rem; margin-top: 8px; }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1024px) {
    .admin-content { padding: 20px 20px; }
    .admin-topbar  { padding: 14px 20px; }
}

@media (max-width: 768px) {
    .menu-toggle-admin { display: flex; }

    .admin-sidebar {
        transform: translateX(-100%);
        box-shadow: none;
    }

    .admin-sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 32px rgba(0,0,0,0.4);
    }

    .admin-main { margin-left: 0; }

    .admin-content { padding: 16px; }

    .stats-grid { grid-template-columns: 1fr 1fr; }

    .admin-form-row { grid-template-columns: 1fr; }

    .admin-modal { max-width: 100%; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}

/* Sidebar overlay mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.active { display: block; }




/* ─── CONTENT PAGE ───────────────────────────────────────── */
.content-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 0.84rem;
    flex-wrap: wrap;
}

.content-breadcrumb a {
    color: var(--brand);
    text-decoration: none;
    font-weight: 600;
}

.content-breadcrumb a:hover { text-decoration: underline; }
.content-breadcrumb span { color: var(--text-muted); }

.content-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
}

.content-course-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 20px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.content-course-card:hover {
    background: var(--brand-soft);
    border-color: var(--brand-border);
    transform: translateY(-2px);
}

.content-course-icon { font-size: 1.4rem; }
.content-arrow { margin-left: auto; color: var(--text-muted); }

/* Content list */
.content-list { display: flex; flex-direction: column; }

.content-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    gap: 16px;
    flex-wrap: wrap;
}

.content-list-item:last-child { border-bottom: none; }
.content-list-item:hover { background: var(--admin-hover); }

.content-list-left {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
    min-width: 0;
}

.content-list-icon { font-size: 1.3rem; flex-shrink: 0; }

.content-list-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.content-list-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.content-list-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    flex-shrink: 0;
}


/* ─── STUDENT DETAIL MODAL ───────────────────────────────── */
.student-detail-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.student-detail-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.student-detail-value {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ─── SETTINGS PAGE ──────────────────────────────────────── */
.pass-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    font-size: 0.95rem;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.pass-toggle:hover { opacity: 1; }

.settings-info-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.settings-info-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.settings-info-value {
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--text-primary);
}