:root{
  --bg:#0b0c10;--panel:#111827;--border:#374151;--text:#e5e7eb;--muted:#9ca3af;
  --primary:#2563eb;--primary-600:#1d4ed8;--success:#10b981;--danger:#ef4444;
}
html,body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;margin:0}
.container{max-width:1200px;margin:0 auto;padding:24px}
.content .container{max-width:1200px;margin:0 auto;padding:24px 24px 48px 24px}
.content .card{margin:16px 0}
.card .heading{margin:0 0 6px 0}
.layout{display:flex}
.sidebar{width:240px;min-height:100vh;background:#000000;border-right:1px solid #000000;position:sticky;top:0;z-index:10000}
.sidebar-inner{padding:16px}
.sidebar nav{display:flex;flex-direction:column;gap:6px}
.sidebar nav a{color:#cbd5e1;text-decoration:none;padding:8px 10px;border-radius:8px;display:block}
.sidebar nav a:hover{background:#000000}
.sidebar .submenu-toggle{font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);padding:8px 10px;border-radius:8px;margin:10px 0 4px 0}
.sidebar .submenu-toggle:hover{background:#000000;color:#e5e7eb}
.sidebar .submenu{display:flex;flex-direction:column;gap:4px;margin:0 0 8px 0}
.sidebar .submenu a{display:block;font-size:14px;color:#cbd5e1;padding:8px 10px 8px 20px}
.sidebar .submenu a:hover{background:#000000}
.content{
  flex:1;
  background:
    radial-gradient(1400px 800px at -15% -10%, rgba(139, 92, 246, 0.4) 0%, rgba(139, 92, 246, 0) 60%),
    radial-gradient(1200px 700px at 110% 20%, rgba(236, 72, 153, 0.45) 0%, rgba(236, 72, 153, 0) 60%),
    radial-gradient(1000px 600px at 50% 100%, rgba(59, 130, 246, 0.35) 0%, rgba(59, 130, 246, 0) 60%),
    radial-gradient(900px 500px at 20% 80%, rgba(168, 85, 247, 0.3) 0%, rgba(168, 85, 247, 0) 60%),
    radial-gradient(800px 400px at 80% 60%, rgba(244, 114, 182, 0.25) 0%, rgba(244, 114, 182, 0) 60%),
    linear-gradient(135deg, #0b0c10 0%, #1a1b2e 25%, #0f172a 50%, #1e1b3a 75%, #0b0c10 100%);
  position:relative;
  min-height:100vh
}
.content::before{
  content:"";
  position:absolute;
  inset:-400px;
  background:
    radial-gradient(1000px 600px at 15% 15%, rgba(139, 92, 246, 0.6), transparent 70%),
    radial-gradient(900px 550px at 85% 5%, rgba(236, 72, 153, 0.55), transparent 70%),
    radial-gradient(800px 500px at 50% 95%, rgba(59, 130, 246, 0.5), transparent 70%),
    radial-gradient(700px 450px at 25% 70%, rgba(168, 85, 247, 0.45), transparent 70%),
    radial-gradient(600px 400px at 75% 40%, rgba(244, 114, 182, 0.4), transparent 70%);
  filter:blur(80px);
  z-index:0;
  pointer-events:none;
  animation:gradientShift 20s ease infinite
}
.content > *{
  position:relative;
  z-index:1
}
@keyframes gradientShift{
  0%,100%{transform:translate(0,0) scale(1);opacity:1}
  33%{transform:translate(30px,-20px) scale(1.1);opacity:0.9}
  66%{transform:translate(-20px,30px) scale(0.95);opacity:0.85}
}
.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:24px}
.btn{display:inline-block;appearance:none;border:none;border-radius:10px;padding:10px 14px;cursor:pointer;text-decoration:none;font-weight:600}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-secondary{background:#334155;color:#e5e7eb}
.btn-outline{background:transparent;color:#93c5fd;border:1px solid #334155}
.btn-danger{background:var(--danger);color:#fff}
.btn-group{display:flex;gap:12px;flex-wrap:wrap}
.table{width:100%;border-collapse:collapse;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.table th,.table td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}
.table thead th{background:#0f172a;color:#cbd5e1}
.table-striped tbody tr:nth-child(even){background:#0f172a}
.heading{margin:0 0 12px 0}
.content h1,.content h2,.content h3,.content .heading,.card h1,.card h2,.card h3{
  background:linear-gradient(90deg,#60a5fa 0%, #a78bfa 50%, #f472b6 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:700
}
.content h1,.card h1{font-size:32px;margin:0 0 16px 0}
.content h2,.card h2{font-size:24px;margin:0 0 12px 0}
.content h3,.card h3{font-size:20px;margin:0 0 8px 0}
.subtle{color:var(--muted)}
.hero{display:flex;flex-direction:column;gap:12px}

/* Form controls - dark theme */
input, select, textarea {
  background:#0f172a;
  color:var(--text);
  border:1px solid var(--border);
  border-radius:8px;
  padding:10px;
  transition:border-color 0.2s ease;
}
input:focus, select:focus, textarea:focus {
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(37,99,235,0.1);
}
input:disabled, select:disabled, textarea:disabled {
  opacity:0.5;
  cursor:not-allowed;
}
input.error, select.error, textarea.error {
  border-color:var(--danger);
}
select {
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;
}

/* Loading states */
.btn.loading {
  position:relative;
  color:transparent !important;
  pointer-events:none;
}
.btn.loading::after {
  content:"";
  position:absolute;
  width:16px;
  height:16px;
  top:50%;
  left:50%;
  margin-left:-8px;
  margin-top:-8px;
  border:2px solid rgba(255,255,255,0.3);
  border-top-color:#fff;
  border-radius:50%;
  animation:spin 0.6s linear infinite;
}
@keyframes spin {
  to { transform:rotate(360deg); }
}

.form-group {
  margin-bottom:16px;
}
.form-group label {
  display:block;
  margin-bottom:6px;
  color:var(--text);
  font-weight:500;
}
.form-group .error-message {
  color:var(--danger);
  font-size:14px;
  margin-top:4px;
  display:none;
}
.form-group.has-error .error-message {
  display:block;
}
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color:var(--danger);
}

/* Flash messages */
.flash {
  padding:12px 16px;
  border-radius:8px;
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:8px;
}
.flash.success {
  background:rgba(16,185,129,0.1);
  border:1px solid rgba(16,185,129,0.3);
  color:#10b981;
}
.flash.error {
  background:rgba(239,68,68,0.1);
  border:1px solid rgba(239,68,68,0.3);
  color:#ef4444;
}
.flash.info {
  background:rgba(37,99,235,0.1);
  border:1px solid rgba(37,99,235,0.3);
  color:#60a5fa;
}