:root {
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --bg-color: #0F172A;
  --surface-color: #1E293B;
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --border-color: #334155;
  --danger: #EF4444;
  --success: #10B981;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { text-decoration: underline; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.5rem 1rem; border-radius: 8px; font-weight: 500;
  cursor: pointer; border: none; transition: all 0.2s ease; font-size: 0.875rem;
}
.btn-primary { background-color: var(--primary); color: white; box-shadow: 0 4px 14px 0 rgba(79,70,229,0.39); }
.btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
.btn-danger { background-color: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background-color: var(--danger); color: white; }

.input-field {
  width: 100%; padding: 0.75rem 1rem;
  background-color: rgba(15,23,42,0.5); border: 1px solid var(--border-color);
  border-radius: 8px; color: white; outline: none; transition: border-color 0.2s ease;
}
.input-field:focus { border-color: var(--primary); }

.card {
  background: var(--surface-color); border: 1px solid var(--border-color);
  border-radius: 16px; padding: 2rem;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

.password-prompt-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.password-prompt-container .card { max-width: 400px; width: 100%; text-align: center; }
.password-prompt-container h1 { margin-bottom: 1rem; font-size: 1.5rem; }
.password-prompt-container p { color: var(--text-muted); margin-bottom: 2rem; }
.password-form { display: flex; flex-direction: column; gap: 1rem; }

.error-alert {
  background-color: rgba(239,68,68,0.1); color: var(--danger);
  padding: 0.75rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.875rem;
}

.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 260px; background-color: var(--surface-color); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; }
.admin-sidebar-header { padding: 1.5rem; font-size: 1.25rem; font-weight: bold; border-bottom: 1px solid var(--border-color); color: white; }
.admin-nav { flex: 1; padding: 1rem; display: flex; flex-direction: column; gap: 0.5rem; }
.admin-nav-item { display: block; padding: 0.75rem 1rem; border-radius: 8px; color: var(--text-muted); font-weight: 500; transition: all 0.2s ease; }
.admin-nav-item:hover, .admin-nav-item.active { background-color: rgba(79,70,229,0.1); color: var(--primary); text-decoration: none; }
.admin-content { flex: 1; padding: 2rem; overflow-y: auto; }
.admin-page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }

.data-table-wrapper { background: var(--surface-color); border-radius: 12px; border: 1px solid var(--border-color); overflow: hidden; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--border-color); }
.data-table th { background-color: rgba(15,23,42,0.3); color: var(--text-muted); font-weight: 600; font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.05em; }
.data-table tbody tr:hover { background-color: rgba(255,255,255,0.02); }
.data-table td { font-size: 0.875rem; vertical-align: middle; }

.modal-overlay { position: fixed; top:0; left:0; right:0; bottom:0; background: rgba(0,0,0,0.7); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 1rem; }
.modal-content { background: var(--surface-color); border-radius: 16px; width: 100%; max-width: 500px; padding: 2rem; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5); animation: modalIn 0.3s cubic-bezier(0.16,1,0.3,1); }
@keyframes modalIn { from { opacity:0; transform: translateY(20px) scale(0.95); } to { opacity:1; transform: translateY(0) scale(1); } }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.modal-close { background: transparent; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.5rem; }
.modal-close:hover { color: white; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-size: 0.875rem; color: var(--text-muted); }

.badge { display: inline-block; padding: 0.25rem 0.6rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 600; background: rgba(79,70,229,0.1); color: var(--primary); }
.badge.master { background: rgba(16,185,129,0.1); color: var(--success); }

.landing-hero {
  min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: radial-gradient(circle at top center, #1E293B 0%, #0F172A 100%);
  text-align: center; padding: 2rem; position: relative; overflow: hidden;
}
.landing-hero h1 {
  font-size: 4rem; font-weight: 800; margin-bottom: 1.5rem;
  background: linear-gradient(to right, #4F46E5, #38BDF8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.landing-hero p { font-size: 1.25rem; color: var(--text-muted); max-width: 600px; margin-bottom: 3rem; }

@media (max-width: 768px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; flex-direction: row; align-items: center; }
  .admin-nav { flex-direction: row; padding: 0.5rem; }
  .admin-sidebar-header { border-bottom: none; border-right: 1px solid var(--border-color); }
  .landing-hero h1 { font-size: 2.5rem; }
  .data-table { font-size: 0.75rem; }
}