/* ─────────────────────────────────────────
   Design tokens
───────────────────────────────────────── */
:root {
  --sidebar-w: 242px;
  --topbar-h: 58px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  --brand:       #6366f1;
  --brand-dark:  #4f46e5;
  --brand-light: #eef2ff;
}

/* Bootstrap 5 token overrides */
:root {
  --bs-primary: var(--brand);
  --bs-primary-rgb: 99, 102, 241;
  --bs-body-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --bs-body-bg: var(--slate-50);
  --bs-body-color: var(--slate-800);
  --bs-border-color: var(--slate-200);
  --bs-border-radius: var(--radius-sm);
}

/* ─────────────────────────────────────────
   Global
───────────────────────────────────────── */
html { font-size: 14px; }
body { margin: 0; min-height: 100vh; }
a { text-decoration: none; }
a:hover { text-decoration: none; }

/* ─────────────────────────────────────────
   Top bar
───────────────────────────────────────── */
.app-topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: #fff;
  border-bottom: 1px solid var(--slate-200);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  z-index: 1030;
  gap: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--slate-900);
  letter-spacing: -0.01em;
}

.app-brand:hover { color: var(--slate-900); }

.brand-logo {
  width: 34px;
  height: 34px;
  background: var(--brand);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 17px;
  flex-shrink: 0;
}

.topbar-user {
  font-size: 0.8125rem;
  color: var(--slate-500);
}

/* ─────────────────────────────────────────
   Sidebar
───────────────────────────────────────── */
.app-sidebar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--slate-900);
  overflow-y: auto;
  z-index: 1020;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
}

.nav-section {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--slate-600);
  padding: 1rem 0.75rem 0.375rem;
}

.nav-section:first-child { padding-top: 0.5rem; }

.app-sidebar .nav-link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5625rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--slate-400);
  font-size: 0.875rem;
  font-weight: 400;
  transition: background 0.12s, color 0.12s;
  margin-bottom: 1px;
}

.app-sidebar .nav-link:hover {
  background: var(--slate-800);
  color: var(--slate-100);
}

.app-sidebar .nav-link.active {
  background: var(--brand);
  color: #fff;
  font-weight: 500;
}

.app-sidebar .nav-link i {
  font-size: 1rem;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

/* ─────────────────────────────────────────
   Shell & content
───────────────────────────────────────── */
.app-shell {
  padding-top: var(--topbar-h);
  min-height: 100vh;
}

.app-content {
  margin-left: var(--sidebar-w);
  padding: 1.75rem 2rem;
  min-height: calc(100vh - var(--topbar-h));
}

/* ─────────────────────────────────────────
   Page header
───────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
}

.page-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0;
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 0.8125rem;
  color: var(--slate-500);
  margin-top: 2px;
}

/* ─────────────────────────────────────────
   Cards
───────────────────────────────────────── */
.card {
  border: 1px solid var(--slate-200) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: 0 1px 3px rgba(0,0,0,.05) !important;
}

.card-body { padding: 1.25rem; }

.card-title {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--slate-800);
}

.card .card-footer {
  background: var(--slate-50) !important;
  border-top: 1px solid var(--slate-100) !important;
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md) !important;
}

/* ─────────────────────────────────────────
   Dashboard quick-action cards
───────────────────────────────────────── */
.qs-card {
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: box-shadow 0.15s, transform 0.15s;
  text-decoration: none;
  color: inherit;
}

.qs-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,.09);
  transform: translateY(-2px);
  color: inherit;
}

.qs-icon {
  width: 46px;
  height: 46px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.qs-icon.c-indigo  { background: #eef2ff; color: var(--brand); }
.qs-icon.c-emerald { background: #ecfdf5; color: #059669; }
.qs-icon.c-amber   { background: #fffbeb; color: #d97706; }
.qs-icon.c-sky     { background: #f0f9ff; color: #0284c7; }
.qs-icon.c-violet  { background: #f5f3ff; color: #7c3aed; }
.qs-icon.c-rose    { background: #fff1f2; color: #e11d48; }

.qs-body .qs-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--slate-800);
  margin-bottom: 3px;
}

.qs-body .qs-desc {
  font-size: 0.8125rem;
  color: var(--slate-500);
  line-height: 1.5;
}

/* ─────────────────────────────────────────
   Tables
───────────────────────────────────────── */
.table {
  font-size: 0.875rem;
  --bs-table-hover-bg: var(--slate-50);
}

.table thead th {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--slate-500);
  background: var(--slate-50) !important;
  border-bottom: 1px solid var(--slate-200) !important;
  padding: 0.75rem 1rem;
  white-space: nowrap;
}

.table td {
  padding: 0.8125rem 1rem;
  vertical-align: middle;
  border-color: var(--slate-100) !important;
}

.table tbody tr:last-child td { border-bottom: none !important; }

/* ─────────────────────────────────────────
   Buttons
───────────────────────────────────────── */
.btn {
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.4375rem 0.875rem;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-sm {
  padding: 0.3125rem 0.625rem;
  font-size: 0.75rem;
}

.btn-primary {
  --bs-btn-bg: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand-dark);
  --bs-btn-hover-border-color: var(--brand-dark);
  --bs-btn-active-bg: #4338ca;
  --bs-btn-active-border-color: #4338ca;
  --bs-btn-focus-shadow-rgb: 99, 102, 241;
  --bs-btn-disabled-bg: var(--brand);
  --bs-btn-disabled-border-color: var(--brand);
}

.btn:focus-visible, .btn:active:focus {
  box-shadow: 0 0 0 0.2rem rgba(99,102,241,.25) !important;
}

/* ─────────────────────────────────────────
   Form controls
───────────────────────────────────────── */
.form-control, .form-select {
  border: 1px solid var(--slate-300);
  border-radius: var(--radius-sm) !important;
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  color: var(--slate-800);
  background-color: #fff;
}

.form-control::placeholder { color: var(--slate-400); }

.form-control:focus, .form-select:focus {
  border-color: var(--brand) !important;
  box-shadow: 0 0 0 3px rgba(99,102,241,.12) !important;
  outline: none;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--slate-700);
  margin-bottom: 0.375rem;
}

.form-text {
  font-size: 0.75rem;
  color: var(--slate-500);
}

.input-group .form-control:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important; }
.input-group .btn:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important; }

/* ─────────────────────────────────────────
   Badges
───────────────────────────────────────── */
.badge {
  border-radius: 20px;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.3em 0.7em;
  letter-spacing: 0.01em;
}

.badge-online  { background: #dcfce7; color: #15803d; }
.badge-offline { background: var(--slate-100); color: var(--slate-500); }

/* ─────────────────────────────────────────
   Alerts (using Bootstrap 5 CSS vars)
───────────────────────────────────────── */
.alert {
  border-radius: var(--radius-md) !important;
  font-size: 0.875rem;
  border-width: 0 !important;
}

.alert-success { --bs-alert-bg: #f0fdf4; --bs-alert-color: #166534; }
.alert-danger  { --bs-alert-bg: #fef2f2; --bs-alert-color: #991b1b; }
.alert-info    { --bs-alert-bg: #eff6ff; --bs-alert-color: #1d4ed8; }
.alert-warning { --bs-alert-bg: #fffbeb; --bs-alert-color: #92400e; }

/* ─────────────────────────────────────────
   Device cards
───────────────────────────────────────── */
.device-card {
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.2s, transform 0.2s;
  overflow: hidden;
  height: 100%;
}

.device-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,.10);
  transform: translateY(-2px);
}

.device-card-header {
  padding: 1.125rem 1.25rem 0.75rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.device-card-body {
  padding: 0 1.25rem 0.875rem;
}

.device-meta {
  font-size: 0.8125rem;
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 0.2rem 0.75rem;
}

.device-meta .meta-key { color: var(--slate-500); }
.device-meta .meta-val { color: var(--slate-700); }

.device-card-footer {
  padding: 0.75rem 1.25rem;
  background: var(--slate-50);
  border-top: 1px solid var(--slate-100);
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

/* ─────────────────────────────────────────
   Code
───────────────────────────────────────── */
code {
  font-size: 0.8125rem;
  background: var(--slate-100);
  color: #7c3aed;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: 'Consolas', 'Cascadia Code', 'SF Mono', 'Courier New', monospace;
}

/* ─────────────────────────────────────────
   Modal
───────────────────────────────────────── */
.modal-content {
  border: none !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: 0 20px 60px rgba(0,0,0,.18) !important;
}

.modal-header {
  border-bottom: 1px solid var(--slate-200);
  padding: 1.125rem 1.5rem;
}

.modal-body { padding: 1.25rem 1.5rem; }
.modal-footer { border-top: 1px solid var(--slate-200); padding: 0.875rem 1.5rem; }

/* ─────────────────────────────────────────
   Login page
───────────────────────────────────────── */
.login-shell {
  min-height: 100vh;
  display: flex;
}

.login-brand-panel {
  width: 45%;
  background: var(--slate-900);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3.5rem 4rem;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.login-brand-panel::before {
  content: '';
  position: absolute;
  top: -35%;
  right: -15%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(99,102,241,.22) 0%, transparent 68%);
  pointer-events: none;
}

.login-brand-panel::after {
  content: '';
  position: absolute;
  bottom: -18%;
  left: -8%;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(99,102,241,.13) 0%, transparent 68%);
  pointer-events: none;
}

.login-brand-content { position: relative; z-index: 1; }

.login-logo {
  width: 60px;
  height: 60px;
  background: var(--brand);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: white;
  margin-bottom: 2rem;
  box-shadow: 0 8px 24px rgba(99,102,241,.4);
}

.login-brand-panel h1 {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.login-tagline {
  font-size: 0.9375rem;
  color: var(--slate-400);
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.login-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.login-feature {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--slate-400);
}

.login-feature i { color: var(--brand); font-size: 1rem; flex-shrink: 0; }

.login-form-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 3rem 2rem;
  background: #fff;
}

.login-form-wrap {
  width: 100%;
  max-width: 380px;
}

.login-form-wrap h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}

.login-form-wrap .login-sub {
  font-size: 0.875rem;
  color: var(--slate-500);
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  .login-brand-panel { display: none; }
  .login-form-panel { padding: 2rem 1.5rem; }
  .app-sidebar { width: 200px; }
  .app-content { margin-left: 200px; padding: 1.25rem; }
}

/* ─────────────────────────────────────────
   Command status badges
───────────────────────────────────────── */
.cmd-badge-completed { background: #dcfce7; color: #15803d; }
.cmd-badge-sent      { background: #dbeafe; color: #1d4ed8; }
.cmd-badge-pending   { background: #fef9c3; color: #854d0e; }
.cmd-badge-failed    { background: #fee2e2; color: #991b1b; }

/* ─────────────────────────────────────────
   Misc
───────────────────────────────────────── */
.text-muted { color: var(--slate-500) !important; }
.fw-semibold { font-weight: 600; }

.section-divider {
  border: none;
  border-top: 1px solid var(--slate-200);
  margin: 1.5rem 0;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--slate-500);
}

.empty-state i { font-size: 2.5rem; margin-bottom: 0.75rem; opacity: .4; display: block; }
.empty-state p { font-size: 0.9375rem; margin: 0; }