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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100vh;
}

/* ==================== Login ==================== */

.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.login-box {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 48px 40px;
  width: 400px;
  max-width: 90vw;
  text-align: center;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.login-logo { margin-bottom: 16px; }

.login-box h1 {
  font-size: 24px;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 4px;
}

.login-subtitle {
  color: #94a3b8;
  font-size: 14px;
  margin-bottom: 32px;
}

.error-msg {
  color: #f87171;
  font-size: 13px;
  margin-top: 12px;
  padding: 8px;
  background: rgba(248, 113, 113, 0.1);
  border-radius: 6px;
}

/* ==================== Layout ==================== */

#main-app {
  display: flex;
  min-height: 100vh;
}

/* ==================== Sidebar ==================== */

.sidebar {
  width: 260px;
  background: #1e293b;
  border-right: 1px solid #334155;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px;
  border-bottom: 1px solid #334155;
}

.brand {
  font-size: 16px;
  font-weight: 700;
  color: #f1f5f9;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid #334155;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #3b82f6;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: white;
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.username {
  font-size: 14px;
  font-weight: 600;
  color: #f1f5f9;
}

.role-badge {
  display: inline-block;
  font-size: 11px;
  padding: 1px 8px;
  border-radius: 10px;
  font-weight: 500;
  width: fit-content;
}

.role-admin {
  background: rgba(139, 92, 246, 0.2);
  color: #a78bfa;
}

.role-user {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.nav-links {
  list-style: none;
  padding: 12px 0;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  cursor: pointer;
  color: #94a3b8;
  font-size: 14px;
  transition: all 0.15s;
}

.nav-item:hover {
  background: rgba(59, 130, 246, 0.1);
  color: #e2e8f0;
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border-right: 3px solid #3b82f6;
}

.nav-icon { font-size: 16px; }

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid #334155;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ==================== Content ==================== */

.content {
  flex: 1;
  padding: 32px;
  overflow-y: auto;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-header h2 { margin: 0; }

.section-desc {
  color: #94a3b8;
  margin-bottom: 20px;
}

h2 {
  font-size: 22px;
  font-weight: 600;
  color: #f1f5f9;
  margin-bottom: 20px;
}

/* ==================== Forms ==================== */

.form-group {
  margin-bottom: 16px;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: #94a3b8;
  margin-bottom: 6px;
  font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="number"],
select {
  width: 100%;
  padding: 10px 14px;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 8px;
  color: #e2e8f0;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

input:focus, select:focus {
  border-color: #3b82f6;
}

/* ==================== Buttons ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: #3b82f6;
  color: white;
}

.btn-primary:hover { background: #2563eb; }

.btn-danger {
  background: #ef4444;
  color: white;
}

.btn-danger:hover { background: #dc2626; }

.btn-outline {
  background: transparent;
  border: 1px solid #475569;
  color: #94a3b8;
}

.btn-outline:hover {
  border-color: #60a5fa;
  color: #60a5fa;
}

.btn-block { width: 100%; }

.btn-sm { padding: 6px 14px; font-size: 13px; }

.btn-xs { padding: 4px 10px; font-size: 12px; border-radius: 6px; }

/* ==================== Stats ==================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.stat-card.stat-online { border-color: #22c55e; }
.stat-card.stat-offline { border-color: #ef4444; }

.stat-value {
  font-size: 36px;
  font-weight: 700;
  color: #f1f5f9;
}

.stat-label {
  font-size: 13px;
  color: #94a3b8;
  margin-top: 4px;
}

/* ==================== Tables ==================== */

.table-container {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: #0f172a;
  border-bottom: 1px solid #334155;
}

td {
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid #1e293b;
}

tr:hover td { background: rgba(59, 130, 246, 0.05); }

td.empty {
  text-align: center;
  color: #64748b;
  padding: 32px;
}

code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13px;
  color: #60a5fa;
}

.key-text {
  font-size: 12px;
  color: #94a3b8;
}

/* ==================== Badges ==================== */

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-online {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
}

.badge-offline {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

/* ==================== Downloads ==================== */

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 20px;
}

.download-icon { font-size: 32px; }

.download-info { flex: 1; }

.download-name {
  font-weight: 600;
  color: #f1f5f9;
  font-size: 14px;
}

.download-size {
  color: #94a3b8;
  font-size: 13px;
  margin-top: 2px;
}

.empty-state {
  text-align: center;
  color: #64748b;
  padding: 48px 24px;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
}

/* ==================== Toast ==================== */

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  z-index: 10000;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.toast-success {
  background: #22c55e;
  color: white;
}

.toast-error {
  background: #ef4444;
  color: white;
}

/* ==================== Modal ==================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9000;
}

.modal {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 0;
  width: 440px;
  max-width: 90vw;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid #334155;
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: #f1f5f9;
}

.modal-close {
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 24px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.modal-close:hover { color: #e2e8f0; }

.modal-body { padding: 24px; }

.help-text {
  font-size: 12px;
  color: #64748b;
  margin-bottom: 16px;
}

/* ==================== Responsive ==================== */

@media (max-width: 768px) {
  #main-app { flex-direction: column; }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #334155;
  }
  .nav-links {
    display: flex;
    overflow-x: auto;
    padding: 0;
  }
  .nav-item {
    white-space: nowrap;
    border-right: none;
    padding: 12px 16px;
  }
  .nav-item.active { border-right: none; border-bottom: 3px solid #3b82f6; }
  .sidebar-footer { flex-direction: row; }
  .content { padding: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}