:root {
  --ui-bg: #f8fafc;
  --ui-surface: #ffffff;
  --ui-surface-raised: #f1f5f9;
  --ui-text: #1e293b;
  --ui-muted: #64748b;
  --ui-border: #e2e8f0;
  --ui-primary: #2563eb;
  --ui-primary-hover: #1d4ed8;
  --ui-success: #047857;
  --ui-warning: #b45309;
  --ui-danger: #dc2626;
  --ui-danger-surface: #fef2f2;
  --ui-shadow: 0 10px 28px rgba(15, 23, 42, 0.16);
}

body.dark {
  --ui-bg: #0f172a;
  --ui-surface: #1e293b;
  --ui-surface-raised: #334155;
  --ui-text: #f1f5f9;
  --ui-muted: #cbd5e1;
  --ui-border: #475569;
  --ui-primary: #60a5fa;
  --ui-primary-hover: #93c5fd;
  --ui-success: #047857;
  --ui-warning: #fbbf24;
  --ui-danger: #f87171;
  --ui-danger-surface: #451a1a;
  --ui-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

body {
  background-color: var(--ui-bg);
  color: var(--ui-text);
  font-family: "Segoe UI", sans-serif;
  transition: background-color 160ms ease, color 160ms ease;
}

body.dark,
body.bg-gray-100 { background-color: var(--ui-bg); color: var(--ui-text); }

input,
select,
textarea {
  border-color: var(--ui-border);
  background-color: var(--ui-surface);
  color: var(--ui-text);
  color-scheme: light;
}

body.dark input,
body.dark select,
body.dark textarea {
  border-color: var(--ui-border);
  background-color: var(--ui-surface);
  color: var(--ui-text);
  color-scheme: dark;
}

.ui-floating-controls {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.ui-floating-button {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 1px solid var(--ui-border);
  border-radius: 50%;
  background: var(--ui-surface);
  color: var(--ui-text);
  box-shadow: var(--ui-shadow);
  cursor: pointer;
  font: inherit;
  font-size: 1.15rem;
  transition: transform 140ms ease, background-color 160ms ease, color 160ms ease;
}

.ui-floating-button:hover { transform: translateY(-2px); }
.ui-floating-button[hidden] { display: none; }
.ui-floating-button:focus-visible,
.session-trigger:focus-visible,
.session-menu button:focus-visible {
  outline: 3px solid var(--ui-primary);
  outline-offset: 2px;
}

.session-control {
  position: relative;
  display: inline-flex;
  max-width: 100%;
}

.header-scroll {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}
.header-scroll .header-item { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 0.35rem; }

.session-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.5rem;
  max-width: min(19rem, 75vw);
  padding: 0.3rem 0.7rem 0.3rem 0.35rem;
  border: 1px solid var(--ui-border);
  border-radius: 9999px;
  background: var(--ui-surface);
  color: var(--ui-text);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.1);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}
.session-trigger:hover { border-color: var(--ui-primary); }

.session-avatar {
  display: grid;
  flex: 0 0 1.8rem;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--ui-primary);
  color: #ffffff;
  font-size: 0.78rem;
}

.session-user-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-chevron { color: var(--ui-muted); font-size: 0.75rem; }

.session-menu {
  position: absolute;
  top: calc(100% + 0.45rem);
  right: 0;
  z-index: 510;
  width: 13rem;
  padding: 0.35rem;
  border: 1px solid var(--ui-border);
  border-radius: 0.65rem;
  background: var(--ui-surface);
  box-shadow: var(--ui-shadow);
}

.session-menu[hidden] { display: none; }
.session-menu button {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  border: 0;
  border-radius: 0.4rem;
  background: transparent;
  color: var(--ui-text);
  cursor: pointer;
  font: inherit;
  text-align: left;
}
.session-menu button:hover { background: var(--ui-surface-raised); }
.session-menu [data-profile-action="logout"] { color: var(--ui-danger); }
.header-scroll { overflow: visible; }

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--ui-border);
  border-radius: 0.375rem;
  background: var(--ui-surface-raised);
  color: var(--ui-text);
  white-space: nowrap;
}
.nav-links a.active {
  border-color: var(--ui-primary);
  background: var(--ui-primary);
  color: #fff;
}
.nav-links a:hover { border-color: var(--ui-primary); color: var(--ui-primary); }
.nav-links a.active:hover { color: #fff; }
.status-dot.status-online { background: var(--ui-success); box-shadow: 0 0 8px var(--ui-success); }
.status-dot.status-cached { background: var(--ui-primary); box-shadow: 0 0 8px var(--ui-primary); }
.status-dot.status-offline { background: var(--ui-danger); box-shadow: 0 0 8px var(--ui-danger); }
.status-dot.status-unknown { background: var(--ui-muted); box-shadow: none; }

.ui-floating-controls { padding-bottom: env(safe-area-inset-bottom); }

.main-content { min-width: 0; }
.main-header .navbar { gap: 1rem; }
.nav-links { min-width: 0; }
.nav-links a:focus-visible,
.btn:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--ui-primary);
  outline-offset: 2px;
}

.alert-warning { color: var(--ui-warning); }
.alert-success { color: var(--ui-success); }
.alert-danger { color: var(--ui-danger); }

body.dark .alert-warning,
body.dark .alert-success,
body.dark .alert-danger {
  background: var(--ui-surface-raised);
  border-color: var(--ui-border);
}

body.dark .btn-secondary { background: var(--ui-surface-raised); color: var(--ui-text); }
body.dark .btn-secondary:hover { background: var(--ui-border); }
body.dark .data-table td { color: var(--ui-text); }

.profile-dialog {
  width: min(32rem, calc(100vw - 2rem));
  max-height: min(85vh, 48rem);
  margin: auto;
  padding: 0;
  overflow: auto;
  border: 1px solid var(--ui-border);
  border-radius: 0.75rem;
  background: var(--ui-surface);
  color: var(--ui-text);
  box-shadow: var(--ui-shadow);
}
.profile-dialog::backdrop { background: rgba(15, 23, 42, 0.58); }
.profile-dialog-inner { padding: 1.25rem; }
.profile-dialog-header,
.profile-form-actions { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; }
.profile-dialog-header { margin-bottom: 1rem; }
.profile-dialog-header h2 { margin: 0; font-size: 1.2rem; }
.profile-form { display: grid; gap: 0.75rem; margin-top: 1rem; }
.profile-form + .profile-form { padding-top: 1rem; border-top: 1px solid var(--ui-border); }
.profile-form label { display: grid; gap: 0.3rem; color: var(--ui-text); font-size: 0.9rem; font-weight: 600; }
.profile-form input {
  width: 100%;
  min-height: 2.7rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--ui-border);
  border-radius: 0.4rem;
  background: var(--ui-surface);
  color: var(--ui-text);
  font: inherit;
}
.profile-form input:focus-visible { outline: 2px solid var(--ui-primary); outline-offset: 1px; }
.profile-form-actions { justify-content: flex-end; margin-top: 0.25rem; }
.profile-message { min-height: 1.4rem; color: var(--ui-muted); font-size: 0.9rem; }
.profile-message.is-error { color: var(--ui-danger); }
.profile-dialog .btn {
  min-height: 2.55rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--ui-border);
  border-radius: 0.4rem;
  background: var(--ui-surface-raised);
  color: var(--ui-text);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}
.profile-dialog .btn-primary { border-color: var(--ui-primary); background: var(--ui-primary); color: #fff; }
.profile-dialog .btn-primary:hover { background: var(--ui-primary-hover); }
.profile-dialog .btn-secondary:hover { background: var(--ui-border); }

body.dark .main-header,
body.dark .data-section,
body.dark .form-card,
body.dark .error-card { background-color: var(--ui-surface); color: var(--ui-text); border-color: var(--ui-border); }
body.dark .main-footer { background-color: var(--ui-surface); color: var(--ui-muted); border-color: var(--ui-border); }
body.dark .data-table th { background-color: var(--ui-surface-raised); color: var(--ui-text); border-color: var(--ui-border); }
body.dark .data-table tbody tr { border-color: var(--ui-border); }
body.dark .data-table tbody tr:hover { background-color: var(--ui-surface-raised); }
body.dark .data-table code,
body.dark .error-message { background-color: var(--ui-surface-raised); color: var(--ui-text); }
body.dark .nav-links a { color: var(--ui-muted); }
body.dark .nav-links a.active,
body.dark .nav-links a:hover { color: var(--ui-primary); }
body.dark .nav-links a.active,
body.dark .nav-links a.active:hover { color: #ffffff; }

@media (max-width: 600px) {
  .ui-floating-controls { right: 0.75rem; bottom: 0.75rem; gap: 0.5rem; }
  .ui-floating-button { width: 2.8rem; height: 2.8rem; }
  .session-menu { right: 0; }
  .header-scroll { flex-wrap: wrap; gap: 0.5rem; }
  .main-header .navbar { align-items: stretch; }
  .main-header .session-control { align-self: flex-end; }
  .main-header .navbar .nav-links { flex-wrap: wrap; overflow: visible; padding-bottom: 0; }
  .main-content { padding-top: 1rem; }
  .data-section { padding: 1rem; }
  .section-header { align-items: flex-start; gap: 0.75rem; }
}