:root {
    --navy: #0b1f5c;
    --navy-2: #102a7a;
    --orange: #ff6a00;
    --soft: #f4f7fb;
    --text: #0f172a;
    --muted: #64748b;
    --line: #dbe3ef;
    --white: #ffffff;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #eef2f7;
    color: var(--text);
}
.pk-admin-layout {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 260px 1fr;
}
.pk-admin-sidebar {
    background: linear-gradient(180deg, var(--navy), var(--navy-2));
    color: #fff;
    padding: 24px 18px;
}
.pk-brand-title { font-size: 30px; font-weight: 800; }
.pk-brand-sub { opacity: .8; margin-top: 4px; }
.pk-nav { display: grid; gap: 10px; margin-top: 28px; }
.pk-nav a {
    display: block; color: #fff; text-decoration: none; font-weight: 700;
    padding: 12px 14px; border-radius: 12px; background: rgba(255,255,255,.08);
}
.pk-nav a.active, .pk-nav a:hover { background: var(--orange); }
.pk-admin-main { padding: 28px; }
.pk-page-head { background: var(--white); border: 1px solid var(--line); border-radius: 22px; padding: 24px; }
.pk-page-head h1 { margin: 0 0 10px; font-size: 46px; color: var(--navy); }
.pk-page-head p { margin: 0; color: var(--muted); font-size: 18px; }
.pk-stats-grid {
    margin-top: 22px;
    display: grid;
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    gap: 16px;
}
.pk-card, .pk-panel {
    background: var(--white); border: 1px solid var(--line); border-radius: 20px;
    padding: 20px; box-shadow: 0 6px 18px rgba(15,23,42,.05);
}
.pk-card span { display: block; color: var(--muted); font-size: 14px; margin-bottom: 8px; }
.pk-card strong { font-size: 34px; color: var(--navy); }
.pk-panel-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; margin-top: 20px; }
.pk-panel h3 { margin-top: 0; color: var(--navy); font-size: 24px; }
.pk-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.pk-btn {
    display: inline-block; background: var(--orange); color: #fff; text-decoration: none;
    padding: 12px 16px; border-radius: 12px; font-weight: 700;
}
.pk-btn.dark { background: var(--navy); }
.pk-tips { margin: 0; padding-left: 18px; line-height: 1.8; }
@media (max-width: 980px) {
    .pk-admin-layout { grid-template-columns: 1fr; }
    .pk-stats-grid { grid-template-columns: repeat(2, minmax(140px,1fr)); }
    .pk-panel-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .pk-admin-main { padding: 14px; }
    .pk-page-head h1 { font-size: 34px; }
    .pk-stats-grid { grid-template-columns: 1fr; }
}