:root{--bg:#f8fbff;--surface:#fff;--text:#0f172a;--muted:#64748b;--primary:#2563eb;--border:#e2e8f0;--shadow:0 18px 40px rgba(15,23,42,.08);--radius:24px}
*{box-sizing:border-box}body{margin:0;font-family:"Plus Jakarta Sans",sans-serif;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}img{max-width:100%;display:block}
.admin-body{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:100vh}
.admin-sidebar{background:#0f172a;color:#dbeafe;padding:26px 18px;position:sticky;top:0;height:100vh;overflow:auto}
.admin-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.admin-brand img{height:42px;background:#fff;border-radius:12px;padding:6px}.admin-brand span{display:block;font-size:.78rem;color:#94a3b8}
.admin-sidebar nav{display:grid;gap:8px}.admin-sidebar nav a{padding:12px 14px;border-radius:16px;color:#cbd5e1;font-weight:700}.admin-sidebar nav a.active,.admin-sidebar nav a:hover{background:rgba(59,130,246,.18);color:#fff}
.admin-main{padding:22px 22px 36px}.admin-topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}.admin-topbar h1{margin:0}.admin-topbar p{margin:6px 0 0;color:var(--muted)}
.admin-userbox{display:flex;align-items:center;gap:16px;background:#fff;padding:12px 16px;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}.stat-card,.admin-panel{background:#fff;border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow)}
.stat-card{padding:20px}.stat-card span{display:block;color:var(--muted);margin-bottom:8px}.stat-card strong{font-size:2rem}
.admin-panel{padding:20px}.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.admin-table{width:100%;border-collapse:collapse}.admin-table th,.admin-table td{padding:14px 12px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
.admin-grid-2{display:grid;grid-template-columns:1fr 1.2fr;gap:18px}
.admin-form label{display:block;font-weight:700;color:#334155;margin-bottom:12px}.admin-form input,.admin-form textarea{width:100%;margin-top:8px;padding:14px 16px;border-radius:16px;border:1px solid var(--border);font:inherit}
.admin-form textarea{min-height:120px}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.checkbox-inline{display:flex;align-items:center;gap:10px}
.btn-admin{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;border:none;padding:14px 18px;border-radius:16px;font-weight:800;cursor:pointer}
.flash{padding:14px 16px;border-radius:16px;margin-bottom:16px}.flash.success{background:#dcfce7;color:#166534}.flash.error{background:#fee2e2;color:#991b1b}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at top left,#dbeafe,transparent 35%),linear-gradient(180deg,#f8fbff,#eef4ff)}
.login-card{width:min(460px,100%);background:#fff;border-radius:28px;padding:32px;border:1px solid var(--border);box-shadow:var(--shadow)}.login-card img{height:52px;margin:0 auto 12px}.login-card h1{text-align:center;margin-bottom:18px}.login-card input{width:100%;padding:16px 18px;border-radius:16px;border:1px solid var(--border);margin-bottom:12px}.login-hint{text-align:center;color:var(--muted);margin-top:12px}
@media (max-width:1100px){.stats-grid{grid-template-columns:repeat(2,1fr)}.admin-grid-2,.form-grid,.admin-body{grid-template-columns:1fr}.admin-sidebar{position:relative;height:auto}}
@media (max-width:700px){.stats-grid{grid-template-columns:1fr}.admin-topbar{flex-direction:column}}