:root {
  --color-bg: #0f1420;
  --color-panel: #171e2e;
  --color-panel-alt: #1e2739;
  --color-border: #2a3448;
  --color-text: #e6e9f0;
  --color-text-muted: #9aa4b8;
  --color-primary: #4a7dff;
  --color-primary-hover: #6b93ff;
  --color-success: #2ecc71;
  --color-warning: #f5a623;
  --color-danger: #e74c3c;
  --radius: 8px;
  --shadow: 0 2px 10px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 230px;
  background: var(--color-panel);
  border-right: 1px solid var(--color-border);
  padding: 20px 0;
  flex-shrink: 0;
}

.sidebar .brand {
  padding: 0 20px 20px;
  font-weight: 700;
  font-size: 1.1rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 10px;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.sidebar nav a:hover, .sidebar nav a.active {
  color: var(--color-text);
  background: var(--color-panel-alt);
}

.main {
  flex: 1;
  padding: 28px 32px;
  max-width: 1100px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h1 { font-size: 1.4rem; margin: 0; }

.card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.card h2 { font-size: 1.05rem; margin-top: 0; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); }
th { color: var(--color-text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:hover td { background: var(--color-panel-alt); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-panel-alt);
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.9rem;
}

.btn:hover { border-color: var(--color-primary); }
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-danger { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 0.8rem; }

input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--color-panel-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.92rem;
}

label { display: block; margin-bottom: 6px; font-size: 0.85rem; color: var(--color-text-muted); }
.form-group { margin-bottom: 16px; }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
}
.badge-success { background: rgba(46,204,113,0.15); color: var(--color-success); }
.badge-warning { background: rgba(245,166,35,0.15); color: var(--color-warning); }
.badge-danger { background: rgba(231,76,60,0.15); color: var(--color-danger); }
.badge-muted { background: rgba(154,164,184,0.15); color: var(--color-text-muted); }

.alert-box {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.alert-box.success { background: rgba(46,204,113,0.12); border: 1px solid var(--color-success); color: var(--color-success); }
.alert-box.error { background: rgba(231,76,60,0.12); border: 1px solid var(--color-danger); color: var(--color-danger); }
.alert-box.warning { background: rgba(245,166,35,0.12); border: 1px solid var(--color-warning); color: var(--color-warning); }

.auth-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.auth-box {
  width: 380px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.auth-box h1 { font-size: 1.2rem; text-align: center; margin-bottom: 24px; }

.text-muted { color: var(--color-text-muted); font-size: 0.85rem; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.flex { display: flex; } .gap-2 { gap: 8px; } .items-center { align-items: center; }
.justify-between { justify-content: space-between; }

.otp-input {
  letter-spacing: 0.5em;
  text-align: center;
  font-size: 1.3rem;
}

.experimental-tag {
  color: var(--color-warning);
  font-size: 0.75rem;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
}