:root {
  --bg:  #020617;
  --bg2: #09090b;
  --bg3: #1e293b;
  --card:  #0f172a;
  --card2: #1e293b;
  --surface-1: rgba(15,23,42,0.92);
  --surface-2: rgba(30,41,59,0.96);
  --glass-bg: rgba(2,6,23,0.85);
  --border: rgba(255,255,255,0.06);
  --border2: rgba(255,255,255,0.12);
  --border-b: rgba(255,255,255,0.15);
  --accent: #06b6d4;
  --accent-dim: rgba(6,182,212,0.08);
  --accent-glow: rgba(6,182,212,0.35);
  --blue: #38bdf8;
  --blue-dim: rgba(56,189,248,0.10);
  --blue-glow: rgba(56,189,248,0.25);
  --green: #10b981;
  --green-dim: rgba(16,185,129,0.10);
  --cyan: #06b6d4;
  --cyan-dim: rgba(6,182,212,0.08);
  --cyan-glow: rgba(6,182,212,0.30);
  --purple: #a78bfa;
  --purple-dim: rgba(167,139,250,0.10);
  --red: #f43f5e;
  --red-dim: rgba(244,63,94,0.10);
  --text: #f1f5f9;
  --text-mid: #94a3b8;
  --sub: #64748b;
  --muted: #475569;
  --mono: 'JetBrains Mono', 'Share Tech Mono', monospace;
  --display: 'Outfit', 'Kanit', sans-serif;
  --body: 'Kanit', sans-serif;
  --sidebar-w: 280px;
  --topbar-h: 72px;
  --radius: 16px;
  --radius-lg: 24px;
  --tr: all 0.4s cubic-bezier(0.19,1,0.22,1);
  --transition: all 0.4s cubic-bezier(0.19,1,0.22,1);
  --shadow-card: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-float: 0 24px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 30px rgba(6,182,212,0.10);
  --focus-ring: 0 0 0 4px rgba(6,182,212,0.20);
}

* { margin:0; padding:0; box-sizing:border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  min-height: 100vh;
  display: flex;
  overflow-x: clip;
}
body::before {
  content:'';
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(148,163,184,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.015) 1px, transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
  z-index:0;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: linear-gradient(180deg, rgba(5,10,14,0.99) 0%, rgba(8,15,20,0.98) 100%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top:0; left:0; bottom:0;
  z-index: 50;
  box-shadow: 10px 0 40px rgba(0,0,0,0.35);
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
}
.sidebar-logo {
  display:flex;
  align-items:center;
  gap:10px;
  padding:22px 20px 18px;
  border-bottom:1px solid var(--border);
  text-decoration:none;
  color:var(--text);
  position:relative;
}
.logo-dot {
  width:8px;
  height:8px;
  background:var(--accent);
  border-radius:50%;
  box-shadow:0 0 14px var(--accent-glow);
  flex-shrink:0;
  animation:pulse-dot 2.5s ease-in-out infinite;
}
.logo-mark { font-family:var(--mono); font-size:16px; color:var(--accent); letter-spacing:3px; }
.logo-ver {
  position:absolute;
  right:16px; top:50%;
  transform:translateY(-50%);
  font-family:var(--mono);
  font-size:9px;
  color:var(--sub);
  letter-spacing:1px;
}
@keyframes pulse-dot {
  0%,100% { opacity:1; box-shadow:0 0 14px var(--accent-glow); }
  50% { opacity:0.35; box-shadow:0 0 4px var(--accent-glow); }
}

.sidebar-user {
  padding:18px 20px;
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  gap:12px;
}
.sb-avatar {
  width:40px; height:40px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-family:var(--display); font-weight:700; font-size:15px;
  color:#fff; flex-shrink:0; position:relative;
}
.sb-avatar-ring {
  position:absolute; inset:-2px;
  border-radius:50%;
  border:2px solid transparent;
  background:linear-gradient(135deg,var(--accent),var(--blue)) border-box;
  -webkit-mask:linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:destination-out;
  mask:linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask-composite:exclude;
  contain-intrinsic-size: 40px 40px;
}
.sb-user-name { font-size:14px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; min-height:1.2em; }
.sb-user-role { font-family:var(--mono); font-size:10px; color:var(--sub); letter-spacing:1px; margin-top:2px; }
.sb-online {
  width:8px; height:8px;
  background:var(--green);
  border-radius:50%;
  box-shadow:0 0 10px rgba(52,211,153,0.5);
  flex-shrink:0; margin-left:auto;
  animation:pulse-dot 2s infinite;
}

.sidebar-nav {
  flex:1; padding:12px 0;
  display:flex; flex-direction:column;
  overflow-y:auto; scrollbar-width:none;
}
.sidebar-nav::-webkit-scrollbar { display:none; }
.nav-label,
.nav-section-label {
  font-family:var(--mono);
  font-size:9px; color:var(--sub);
  letter-spacing:3px; text-transform:uppercase;
  padding:16px 20px 6px; font-weight:normal;
}
.nav-item {
  display:flex; align-items:center; gap:12px;
  padding:10px 20px;
  text-decoration:none; color:var(--text-mid);
  font-size:13.5px;
  transition:var(--transition, var(--tr));
  position:relative; cursor:pointer;
  border:none; background:transparent;
  width:100%; text-align:left;
  font-family:var(--body);
  border-left:2px solid transparent;
  border-radius:0 14px 14px 0;
}
.nav-item:hover { color:var(--text); background:rgba(6,182,212,0.06); transform:translateX(3px); }
.nav-item.active { color:var(--accent); background:var(--accent-dim); border-left-color:var(--accent); }
.ni-icon {
  width:28px; height:28px;
  display:flex; align-items:center; justify-content:center;
  border-radius:10px; font-size:14px;
  background:rgba(255,255,255,0.04);
  flex-shrink:0; transition:var(--transition);
}
.nav-item.active .ni-icon { background:var(--accent-dim); }
.nav-item:hover .ni-icon { background:rgba(6,182,212,0.08); }
.sidebar-bottom { padding:16px 20px; border-top:1px solid var(--border); }
.logout-btn {
  display:flex; align-items:center; gap:10px;
  color:var(--sub); font-size:13px; cursor:pointer;
  transition:color .2s; background:none; border:none;
  font-family:var(--body); width:100%; padding:8px 0;
}
.logout-btn:hover { color:var(--red); }

/* ── Main area ───────────────────────────────────────────── */
.main { margin-left:var(--sidebar-w); flex:1; min-height:100vh; z-index:1; position:relative; }
.topbar {
  position:sticky; top:0; z-index:40;
  height:var(--topbar-h, 64px);
  background:var(--glass-bg);
  backdrop-filter:blur(28px) saturate(140%);
  -webkit-backdrop-filter:blur(28px) saturate(140%);
  border-bottom:1px solid var(--border);
  box-shadow:0 8px 24px rgba(0,0,0,0.25);
  display:flex; align-items:center; justify-content:space-between;
  padding:0 40px;
  contain: layout;
}
.topbar-title { font-family:var(--display); font-size:20px; font-weight:700; letter-spacing:0.5px; color:var(--text); }
.topbar-sub { font-family:var(--mono); font-size:10px; color:var(--sub); letter-spacing:2px; margin-top:2px; }
.tb-btn {
  width:36px; height:36px;
  border-radius:12px;
  background:var(--surface-1);
  border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; font-size:15px;
  transition:var(--transition, var(--tr));
  color:var(--text-mid); text-decoration:none;
}
.tb-btn:hover { border-color:var(--accent); color:var(--accent); background:var(--accent-dim); transform:translateY(-1px); box-shadow:0 4px 16px rgba(6,182,212,0.14); }

/* ── Mobile ──────────────────────────────────────────────── */
.mobile-topbar {
  display:none;
  position:fixed; top:0; left:0; right:0; z-index:200;
  background:rgba(5,10,14,0.94);
  backdrop-filter:blur(28px) saturate(140%);
  -webkit-backdrop-filter:blur(28px) saturate(140%);
  border-bottom:1px solid var(--border);
  box-shadow:0 8px 24px rgba(0,0,0,0.28);
  padding:0 20px;
  align-items:center; justify-content:space-between;
  height:60px;
}
.hamburger {
  background:rgba(6,182,212,0.06);
  border:1px solid var(--border);
  color:var(--text); font-size:16px; cursor:pointer;
  width:38px; height:38px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  transition:var(--tr);
}
.hamburger:hover { background:var(--accent-dim); border-color:var(--accent); color:var(--accent); }
.mobile-overlay {
  display:none; position:fixed; inset:0;
  background:rgba(0,0,0,0.7); z-index:149;
}
.mobile-overlay.active { display:block; }

/* ── Content area ────────────────────────────────────────── */
.content { padding:32px 40px; max-width:1400px; }
.page-header { margin-bottom:32px; }
.page-header h1 { font-family:var(--display); font-size:28px; font-weight:700; color:var(--text); margin-bottom:6px; }
.page-header p { color:var(--text-mid); font-size:14px; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-card);
  transition:var(--transition);
}
.card:hover { border-color:var(--border-b); box-shadow:0 20px 48px rgba(0,0,0,0.42); transform:translateY(-2px); }

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display:inline-flex; align-items:center; gap:5px;
  padding:3px 10px; border-radius:99px;
  font-family:var(--mono); font-size:10px; letter-spacing:1px;
  font-weight:600; text-transform:uppercase;
}
.badge-cyan { background:var(--cyan-dim); color:var(--cyan); border:1px solid rgba(245,158,11,0.22); }
.badge-accent { background:var(--accent-dim); color:var(--accent); border:1px solid rgba(6,182,212,0.22); }
.badge-green { background:var(--green-dim); color:var(--green); border:1px solid rgba(52,211,153,0.22); }
.badge-red   { background:var(--red-dim);   color:var(--red);   border:1px solid rgba(248,113,113,0.22); }
.badge-purple{ background:var(--purple-dim);color:var(--purple);border:1px solid rgba(167,139,250,0.22); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:10px 20px; border-radius:12px;
  font-family:var(--display); font-size:13px; font-weight:700;
  letter-spacing:0.5px; cursor:pointer;
  transition:var(--transition); border:none;
  text-decoration:none;
}
.btn-primary {
  background:linear-gradient(135deg,var(--accent),var(--blue));
  color: var(--bg);
  box-shadow:0 4px 18px rgba(6,182,212,0.28);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 28px rgba(6,182,212,0.38); filter:brightness(1.06); }
.btn-secondary {
  background:var(--surface-1);
  color:var(--text-mid);
  border:1px solid var(--border);
}
.btn-secondary:hover { border-color:var(--accent); color:var(--accent); background:var(--accent-dim); }
.btn-danger {
  background:var(--red-dim);
  color:var(--red);
  border:1px solid rgba(248,113,113,0.22);
}
.btn-danger:hover { background:var(--red); color:#fff; border-color:var(--red); }

/* ── Table ───────────────────────────────────────────────── */
.table-wrap { overflow-x:auto; border-radius:var(--radius); border:1px solid var(--border); }
table { width:100%; border-collapse:collapse; }
thead { background:var(--card2); }
th { font-family:var(--mono); font-size:10px; color:var(--sub); letter-spacing:2px; text-transform:uppercase; padding:14px 16px; text-align:left; border-bottom:1px solid var(--border); font-weight:normal; }
td { padding:14px 16px; font-size:13.5px; color:var(--text-mid); border-bottom:1px solid rgba(120,140,160,0.12); }
tr:last-child td { border-bottom:none; }
tr:hover td { color:var(--text); background:rgba(6,182,212,0.04); }

/* ── Form elements ───────────────────────────────────────── */
.form-group { margin-bottom:18px; }
.form-label { display:block; font-family:var(--mono); font-size:10px; color:var(--accent); letter-spacing:2px; margin-bottom:8px; text-transform:uppercase; }
.form-input, .form-select, .form-textarea {
  width:100%; background:var(--bg2);
  border:1px solid var(--border);
  color:var(--text); font-family:var(--body); font-size:14px;
  padding:12px 16px; border-radius:12px; outline:none;
  transition:border-color .25s,box-shadow .25s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color:var(--accent);
  box-shadow:var(--focus-ring);
}
.form-input::placeholder { color:var(--sub); }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width:6px; height:6px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:rgba(6,182,212,0.22); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background:rgba(6,182,212,0.45); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width:900px) {
  .sidebar { transform:translateX(-100%); }
  .sidebar.open { transform:translateX(0); box-shadow:20px 0 60px rgba(0,0,0,0.5); }
  .mobile-topbar { display:flex; }
  .main { margin-left:0; padding-top:60px; }
  .content { padding:24px 20px; }
  .topbar { display:none; }
}
@media (max-width:600px) {
  .content { padding:16px; }
}