/* Admin Panel CSS */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Inter',sans-serif; background:#f0f4f8; color:#2d3748; }
a { text-decoration:none; color:inherit; }

:root {
    --primary:#1a3a6b;
    --primary-light:#2a5298;
    --accent:#e8a000;
    --sidebar-w:260px;
    --white:#fff;
    --border:#e2e8f0;
    --shadow:0 2px 12px rgba(0,0,0,0.07);
}

/* SIDEBAR */
.admin-layout { display:flex; min-height:100vh; }
.sidebar {
    width:var(--sidebar-w); background:var(--primary);
    position:fixed; top:0; left:0; height:100vh;
    overflow-y:auto; z-index:100;
    display:flex; flex-direction:column;
}
.sidebar-header { padding:22px 20px; border-bottom:1px solid rgba(255,255,255,0.1); }
.sidebar-header img { height:50px; margin-bottom:10px; display:block; }
.sidebar-header h2 { color:#fff; font-size:14px; font-weight:600; line-height:1.3; }
.sidebar-header p { color:rgba(255,255,255,0.5); font-size:11px; }
.sidebar-nav { flex:1; padding:14px 0; }
.sidebar-nav .nav-label { color:rgba(255,255,255,0.4); font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:1.5px; padding:14px 20px 6px; }
.sidebar-nav a {
    display:flex; align-items:center; gap:12px;
    padding:11px 20px; color:rgba(255,255,255,0.75);
    font-size:13.5px; font-weight:500;
    transition:all 0.18s; border-left:3px solid transparent;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
    background:rgba(255,255,255,0.1);
    color:#fff; border-left-color:var(--accent);
}
.sidebar-nav a .icon { font-size:18px; width:22px; flex-shrink:0; }
.sidebar-footer { padding:16px 20px; border-top:1px solid rgba(255,255,255,0.1); }
.sidebar-footer a { color:rgba(255,255,255,0.6); font-size:13px; display:flex; gap:8px; align-items:center; }
.sidebar-footer a:hover { color:#fff; }

/* MAIN */
.admin-main { margin-left:var(--sidebar-w); flex:1; display:flex; flex-direction:column; }
.admin-topbar {
    background:#fff; border-bottom:1px solid var(--border);
    padding:0 28px; height:62px; display:flex; align-items:center; justify-content:space-between;
    position:sticky; top:0; z-index:50; box-shadow:var(--shadow);
}
.topbar-left h1 { font-size:18px; font-weight:600; color:var(--primary); }
.topbar-left p { font-size:12px; color:#718096; }
.topbar-right { display:flex; gap:16px; align-items:center; }
.topbar-right .admin-badge { background:var(--primary); color:#fff; padding:6px 14px; border-radius:20px; font-size:12px; font-weight:600; }

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

/* CARDS */
.stat-cards { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-bottom:28px; }
.stat-card { background:#fff; border-radius:12px; padding:22px; box-shadow:var(--shadow); border-left:4px solid var(--primary); }
.stat-card.accent { border-left-color:var(--accent); }
.stat-card.green { border-left-color:#38a169; }
.stat-card.red { border-left-color:#e53e3e; }
.stat-card .num { font-size:36px; font-weight:700; color:var(--primary); line-height:1; }
.stat-card.accent .num { color:var(--accent); }
.stat-card.green .num { color:#38a169; }
.stat-card.red .num { color:#e53e3e; }
.stat-card .label { font-size:13px; color:#718096; margin-top:6px; font-weight:500; }

/* PANELS */
.panel { background:#fff; border-radius:12px; box-shadow:var(--shadow); margin-bottom:24px; }
.panel-header { padding:18px 24px; border-bottom:1px solid var(--border); display:flex; justify-content:space-between; align-items:center; }
.panel-header h3 { font-size:15px; font-weight:600; color:var(--primary); }
.panel-body { padding:24px; }

/* BUTTONS */
.btn { display:inline-block; padding:9px 20px; border-radius:6px; font-size:13px; font-weight:600; cursor:pointer; border:none; font-family:'Inter',sans-serif; transition:all 0.18s; }
.btn-primary { background:var(--primary); color:#fff; }
.btn-primary:hover { background:var(--primary-light); }
.btn-accent { background:var(--accent); color:#333; }
.btn-accent:hover { background:#f5c53d; }
.btn-danger { background:#e53e3e; color:#fff; }
.btn-danger:hover { background:#c53030; }
.btn-sm { padding:6px 14px; font-size:12px; }
.btn-outline { background:transparent; border:1.5px solid var(--border); color:#4a5568; }
.btn-outline:hover { border-color:var(--primary); color:var(--primary); }

/* FORMS */
.form-group { margin-bottom:18px; }
.form-group label { display:block; font-size:12.5px; font-weight:600; color:#4a5568; margin-bottom:6px; text-transform:uppercase; letter-spacing:0.5px; }
.form-group input, .form-group select, .form-group textarea {
    width:100%; padding:10px 14px; border:1.5px solid var(--border);
    border-radius:7px; font-size:14px; font-family:'Inter',sans-serif;
    transition:border 0.2s, box-shadow 0.2s; background:#fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline:none; border-color:var(--primary-light);
    box-shadow:0 0 0 3px rgba(42,82,152,0.1);
}
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.form-group textarea { min-height:100px; resize:vertical; }

/* FILE UPLOAD */
.file-upload-area {
    border:2px dashed var(--border); border-radius:10px; padding:30px;
    text-align:center; cursor:pointer; transition:border-color 0.2s, background 0.2s;
}
.file-upload-area:hover, .file-upload-area.drag { border-color:var(--primary); background:#f0f4ff; }
.file-upload-area .up-icon { font-size:40px; margin-bottom:10px; opacity:0.5; }
.file-upload-area p { font-size:14px; color:#718096; }
.file-upload-area strong { color:var(--primary); }
input[type="file"] { display:none; }
.file-preview { margin-top:12px; background:#f7fafc; border:1px solid var(--border); border-radius:7px; padding:10px 14px; display:flex; align-items:center; gap:10px; font-size:13px; display:none; }
.file-preview.show { display:flex; }

/* TABLES */
.table-wrap { overflow-x:auto; }
table { width:100%; border-collapse:collapse; font-size:13.5px; }
table th { background:#f7fafc; color:#4a5568; padding:11px 16px; text-align:left; font-weight:600; font-size:12px; text-transform:uppercase; letter-spacing:0.5px; border-bottom:1px solid var(--border); }
table td { padding:12px 16px; border-bottom:1px solid var(--border); color:#2d3748; }
table tr:last-child td { border-bottom:none; }
table tr:hover td { background:#f7fafc; }
.badge { display:inline-block; padding:3px 10px; border-radius:20px; font-size:11px; font-weight:700; text-transform:uppercase; }
.badge-green { background:#c6f6d5; color:#276749; }
.badge-blue { background:#bee3f8; color:#2b6cb0; }
.badge-yellow { background:#fefcbf; color:#975a16; }
.badge-red { background:#fed7d7; color:#9b2c2c; }

/* ALERTS */
.alert { padding:12px 18px; border-radius:7px; margin-bottom:16px; font-size:14px; font-weight:500; }
.alert-success { background:#f0fff4; color:#276749; border:1px solid #9ae6b4; }
.alert-error { background:#fff5f5; color:#c53030; border:1px solid #feb2b2; }
.alert-info { background:#ebf8ff; color:#2b6cb0; border:1px solid #90cdf4; }

/* LOGIN PAGE */
.login-page { min-height:100vh; display:flex; align-items:center; justify-content:center; background:linear-gradient(135deg,#1a3a6b,#2a5298); }
.login-card { background:#fff; border-radius:16px; padding:48px 44px; width:100%; max-width:420px; box-shadow:0 20px 60px rgba(0,0,0,0.3); }
.login-card .logo-center { text-align:center; margin-bottom:28px; }
.login-card .logo-center img { height:70px; }
.login-card h2 { text-align:center; font-size:22px; color:var(--primary); margin-bottom:6px; }
.login-card .sub { text-align:center; color:#718096; font-size:13px; margin-bottom:28px; }

/* RESPONSIVE */
@media (max-width:900px) {
    .sidebar { width:220px; }
    .admin-main { margin-left:220px; }
    .stat-cards { grid-template-columns:repeat(2,1fr); }
}
@media (max-width:640px) {
    .sidebar { transform:translateX(-100%); transition:0.3s; }
    .sidebar.open { transform:translateX(0); }
    .admin-main { margin-left:0; }
    .stat-cards { grid-template-columns:1fr; }
    .form-row { grid-template-columns:1fr; }
}