/* ============================================================
   ProdigicTut Admin Panel CSS
   ============================================================ */

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

:root {
    --primary: #1a5cd6;
    --primary-dark: #1344a8;
    --navy: #1a2a4a;
    --sidebar-bg: #1a2a4a;
    --sidebar-text: rgba(255,255,255,0.75);
    --sidebar-active: rgba(255,255,255,0.12);
    --sidebar-width: 240px;
    --topbar-h: 60px;
    --bg: #f4f6fb;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --border: #e4e8ef;
    --text: #1a1a2e;
    --text-muted: #6c757d;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
    --blue: #1a5cd6;
    --shadow: 0 2px 10px rgba(0,0,0,0.07);
    --radius: 10px;
}

* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Inter',sans-serif; background:var(--bg); color:var(--text); font-size:14px; }
a { color:var(--primary); text-decoration:none; }

/* ── Layout ── */
.admin-wrapper { display:flex; min-height:100vh; }
.admin-main    { flex:1; display:flex; flex-direction:column; min-width:0; margin-left:var(--sidebar-width); }
.admin-content { padding:24px; flex:1; }

/* ── Sidebar ── */
.sidebar {
    width:var(--sidebar-width);
    background:var(--sidebar-bg);
    position:fixed; top:0; left:0; bottom:0;
    display:flex; flex-direction:column;
    overflow-y:auto; z-index:200;
    transition:transform 0.3s ease;
}
.sidebar-logo {
    display:flex; align-items:center; gap:10px;
    padding:18px 20px; border-bottom:1px solid rgba(255,255,255,0.08);
}
.sidebar-logo span { color:#fff; font-size:16px; font-weight:700; }
.sidebar-nav { padding:12px 0; flex:1; }
.sidebar-nav a {
    display:flex; align-items:center; gap:10px;
    padding:10px 20px; color:var(--sidebar-text);
    font-size:14px; font-weight:500; transition:all 0.2s;
    border-left:3px solid transparent;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
    background:var(--sidebar-active); color:#fff;
    border-left-color:#fff;
}
.nav-section {
    padding:16px 20px 4px;
    font-size:11px; font-weight:600; letter-spacing:1px;
    text-transform:uppercase; color:rgba(255,255,255,0.35);
}
.nav-icon { font-size:16px; width:20px; text-align:center; flex-shrink:0; }
.nav-badge {
    margin-left:auto; background:#ef4444; color:#fff;
    font-size:11px; font-weight:700; border-radius:50px;
    padding:2px 7px; min-width:20px; text-align:center;
}

/* ── Topbar ── */
.admin-topbar {
    height:var(--topbar-h); background:var(--white);
    border-bottom:1px solid var(--border);
    display:flex; align-items:center; gap:16px;
    padding:0 24px; position:sticky; top:0; z-index:100;
    box-shadow:var(--shadow);
}
.sidebar-toggle { background:none; border:none; font-size:20px; cursor:pointer; color:var(--text); padding:4px; display:none; }
.topbar-title   { font-weight:600; font-size:16px; flex:1; }
.topbar-right   { display:flex; align-items:center; gap:14px; }
.topbar-user    { font-size:14px; color:var(--text-muted); }
.btn-logout {
    background:none; border:1px solid var(--border);
    color:var(--text); padding:6px 14px; border-radius:6px;
    cursor:pointer; font-size:13px; font-family:'Inter',sans-serif;
    transition:all 0.2s;
}
.btn-logout:hover { background:var(--danger); color:#fff; border-color:var(--danger); }

/* ── Login ── */
.login-body     { display:flex; align-items:center; justify-content:center; min-height:100vh; background:var(--bg); }
.login-card     { background:var(--white); border-radius:16px; padding:40px; width:100%; max-width:420px; box-shadow:0 8px 30px rgba(0,0,0,0.1); }
.login-logo     { text-align:center; margin-bottom:28px; }
.login-logo img { margin:0 auto 12px; }
.login-logo h1  { font-size:22px; font-weight:700; color:var(--navy); }
.login-logo p   { font-size:14px; color:var(--text-muted); }

/* ── Cards ── */
.admin-card {
    background:var(--white); border-radius:var(--radius);
    border:1px solid var(--border); padding:24px;
    box-shadow:var(--shadow); margin-bottom:20px;
}
.card-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.card-header h3 { font-size:16px; font-weight:600; }

/* ── Dashboard Stats ── */
.stats-grid-4 {
    display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:20px;
}
.stat-card {
    border-radius:var(--radius); padding:20px;
    display:flex; align-items:center; gap:16px; color:#fff;
}
.stat-card.blue   { background:linear-gradient(135deg,#1a5cd6,#1344a8); }
.stat-card.green  { background:linear-gradient(135deg,#16a34a,#15803d); }
.stat-card.purple { background:linear-gradient(135deg,#7c3aed,#6d28d9); }
.stat-card.orange { background:linear-gradient(135deg,#ea580c,#c2410c); }
.stat-icon { font-size:32px; opacity:0.85; }
.stat-num  { font-size:32px; font-weight:800; line-height:1; }
.stat-label{ font-size:14px; font-weight:600; opacity:0.9; margin-top:2px; }
.stat-sub  { font-size:12px; opacity:0.7; margin-top:2px; }

.dashboard-grid { display:grid; grid-template-columns:1fr 1fr; gap:20px; }

/* ── Tables ── */
.admin-table { width:100%; border-collapse:collapse; font-size:14px; }
.admin-table th {
    text-align:left; padding:10px 12px;
    background:var(--bg); border-bottom:2px solid var(--border);
    font-weight:600; font-size:12px; text-transform:uppercase;
    letter-spacing:0.5px; color:var(--text-muted); white-space:nowrap;
}
.admin-table td { padding:12px; border-bottom:1px solid var(--border); vertical-align:middle; }
.admin-table tr:last-child td { border-bottom:none; }
.admin-table tr:hover td { background:var(--bg); }
.admin-table tr.row-unread td { background:#fffbeb; font-weight:500; }
.actions { display:flex; gap:6px; align-items:center; white-space:nowrap; }
.text-muted { color:var(--text-muted); }
.text-sm    { font-size:12px; }
.text-center{ text-align:center; }

/* ── Badges ── */
.badge {
    display:inline-block; padding:3px 10px; border-radius:50px;
    font-size:11px; font-weight:600;
}
.badge-success { background:#dcfce7; color:#16a34a; }
.badge-danger  { background:#fee2e2; color:#dc2626; }
.badge-warning { background:#fef3c7; color:#d97706; }
.badge-blue    { background:#dbeafe; color:#1d4ed8; }

/* ── Buttons ── */
.btn {
    display:inline-flex; align-items:center; gap:6px;
    padding:9px 18px; border-radius:7px; font-size:14px;
    font-weight:500; cursor:pointer; border:1.5px solid transparent;
    font-family:'Inter',sans-serif; transition:all 0.2s;
}
.btn-primary { background:var(--primary); color:#fff; border-color:var(--primary); }
.btn-primary:hover { background:var(--primary-dark); border-color:var(--primary-dark); color:#fff; }
.btn-outline { background:transparent; color:var(--text); border-color:var(--border); }
.btn-outline:hover { border-color:var(--primary); color:var(--primary); }
.btn-danger  { background:#fee2e2; color:var(--danger); border-color:#fca5a5; }
.btn-danger:hover  { background:var(--danger); color:#fff; }
.btn-sm { padding:5px 12px; font-size:12px; }

/* ── Page Actions ── */
.page-actions { display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; gap:12px; }
.search-form  { display:flex; gap:8px; flex-wrap:wrap; flex:1; }
.search-form .form-control { flex:1; min-width:150px; max-width:250px; }

/* ── Forms ── */
.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:13px; font-weight:500; margin-bottom:5px; color:var(--text); }
.form-control {
    width:100%; padding:9px 12px; border:1.5px solid var(--border);
    border-radius:7px; font-size:14px; font-family:'Inter',sans-serif;
    background:var(--white); color:var(--text); transition:border-color 0.2s;
}
.form-control:focus { outline:none; border-color:var(--primary); box-shadow:0 0 0 3px rgba(26,92,214,0.08); }
select.form-control { cursor:pointer; }
textarea.form-control { resize:vertical; }
.form-row-2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.form-row-3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px; }
.form-section-title {
    font-size:13px; font-weight:700; letter-spacing:0.5px;
    text-transform:uppercase; color:var(--primary);
    border-bottom:2px solid var(--border); padding-bottom:8px;
    margin:24px 0 16px;
}
.form-section-title:first-of-type { margin-top:0; }
.form-actions { display:flex; gap:10px; margin-top:24px; padding-top:20px; border-top:1px solid var(--border); }

/* Toggle / Checkbox */
.toggle-label { display:flex; align-items:center; gap:7px; cursor:pointer; font-size:14px; font-weight:500; }
.checkbox-group { display:flex; flex-wrap:wrap; gap:12px; }
.checkbox-label { display:flex; align-items:center; gap:5px; cursor:pointer; font-size:13px; }

/* Image upload preview */
.image-upload {
    display:flex; align-items:center; gap:14px; flex-wrap:wrap;
}
.image-upload-row {
    display:flex; align-items:center; gap:16px; flex-wrap:wrap;
}
.image-upload-row > label {
    margin-bottom:0; min-width:70px;
}
.image-upload-preview {
    width:86px; height:86px; border-radius:50%;
    border:2px dashed var(--border); background:var(--bg);
    display:flex; align-items:center; justify-content:center;
    overflow:hidden; cursor:pointer; transition:all 0.2s;
}
.image-upload-preview:hover {
    border-color:var(--primary); box-shadow:0 0 0 3px rgba(26,92,214,0.08);
}
.image-upload-preview img {
    width:100%; height:100%; object-fit:cover; display:block;
}
.image-upload-preview.course-banner-upload {
    width:160px; height:90px; border-radius:8px;
}
.image-upload-meta {
    display:flex; flex-direction:column; gap:4px;
}
.image-upload-meta strong {
    font-size:13px; font-weight:600;
}
.image-upload-meta span {
    font-size:12px; color:var(--text-muted);
}
.file-input-hidden {
    position:absolute; width:1px; height:1px; opacity:0; pointer-events:none;
}

/* Char count */
.char-count { font-size:12px; color:var(--text-muted); text-align:right; margin-top:3px; }

/* ── Alerts ── */
.alert { padding:12px 16px; border-radius:8px; margin-bottom:16px; font-size:14px; font-weight:500; }
.alert-success { background:#dcfce7; color:#16a34a; border:1px solid #bbf7d0; }
.alert-danger  { background:#fee2e2; color:#dc2626; border:1px solid #fca5a5; }

/* ── Pagination ── */
.pagination-wrap { margin-top:16px; display:flex; justify-content:flex-end; }

/* ── Responsive ── */
@media (max-width: 1024px) {
    .stats-grid-4 { grid-template-columns:1fr 1fr; }
    .dashboard-grid { grid-template-columns:1fr; }
}
@media (max-width: 768px) {
    .sidebar { transform:translateX(-100%); }
    .sidebar.open { transform:translateX(0); }
    .admin-main { margin-left:0; }
    .sidebar-toggle { display:block; }
    .stats-grid-4 { grid-template-columns:1fr 1fr; }
    .form-row-2, .form-row-3 { grid-template-columns:1fr; }
}