/* ── Reset & Tokens ────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --color-bg:        #F8FAFC;
  --color-surface:   #FFFFFF;
  --color-border:    #E2E8F0;
  --color-text:      #1E293B;
  --color-text-sub:  #64748B;
  --color-accent:    #2563EB;
  --color-accent-h:  #1D4ED8;
  --color-error:     #DC2626;
  --color-success:   #16A34A;
  --color-disabled:  #94A3B8;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.05);

  --font-sans:  'Fira Sans', ui-sans-serif, system-ui, sans-serif;
  --font-mono:  'Fira Code', ui-monospace, monospace;

  --transition: 150ms ease;
}

html { font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Login View ────────────────────────────────────────── */
.login-bg {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--color-bg);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 36px 32px 32px;
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.login-brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-text);
}

.login-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.login-sub {
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 24px;
}

/* ── Form Elements ─────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-input {
  display: block;
  width: 100%;
  padding: 9px 12px;
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input::placeholder { color: var(--color-disabled); }

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* ── Buttons ───────────────────────────────────────────── */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: #fff;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
  margin-top: 4px;
}

.btn-primary:hover:not(:disabled) { background: var(--color-accent-h); }
.btn-primary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-spinner {
  display: none;
  animation: spin 0.75s linear infinite;
}

.btn-primary.loading .btn-spinner { display: block; }
.btn-primary.loading .btn-text { opacity: 0.7; }

@keyframes spin { to { transform: rotate(360deg); } }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--color-text-sub);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: #CBD5E1;
  background: #F1F5F9;
}

.btn-ghost:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* ── Error ─────────────────────────────────────────────── */
.error {
  font-size: 13px;
  color: var(--color-error);
  min-height: 20px;
  margin-top: 10px;
}

/* ── App Layout ────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.app-layout {
  display: flex;
  min-height: calc(100dvh - 52px);
}

/* ── Sidebar Nav ───────────────────────────────────────── */
.app-nav {
  width: 180px;
  flex-shrink: 0;
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tab {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--color-text-sub);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition: color var(--transition), background var(--transition);
}

.tab:hover {
  color: var(--color-text);
  background: var(--color-bg);
}

.tab.active {
  color: var(--color-accent);
  background: rgba(37, 99, 235, 0.07);
  font-weight: 600;
}

.tab:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* ── Main Content ──────────────────────────────────────── */
.app-main {
  flex: 1;
  padding: 24px;
  overflow: auto;
}

.tab-panel { min-height: 100%; }

/* ── Table (shared) ────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
  font-family: var(--font-sans);
}

thead { background: var(--color-bg); }

th {
  padding: 8px 12px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-sub);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }

tbody tr { transition: background var(--transition); }
tbody tr:nth-child(even) { background: rgba(248, 250, 252, 0.6); }
tbody tr:hover { background: #EFF6FF; }

/* ── Inline action button (inside table cells) ─────────── */
.btn-sm {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--color-accent);
  background: rgba(37, 99, 235, 0.07);
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-sm:hover { background: rgba(37, 99, 235, 0.14); border-color: rgba(37, 99, 235, 0.32); }
.btn-sm:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* ── User Detail Card ──────────────────────────────────── */
.detail-card {
  margin-top: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 20px 24px;
}

.detail-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.detail-meta {
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 16px;
  line-height: 1.7;
}

.detail-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.detail-actions select {
  padding: 6px 10px;
  font-size: 13px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}
.detail-actions select:focus { border-color: var(--color-accent); }

.btn-action {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-action:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.btn-action-primary {
  color: #fff;
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn-action-primary:hover { background: var(--color-accent-h); border-color: var(--color-accent-h); }

.btn-action-danger {
  color: var(--color-error);
  background: rgba(220, 38, 38, 0.06);
  border: 1px solid rgba(220, 38, 38, 0.2);
}
.btn-action-danger:hover { background: rgba(220, 38, 38, 0.12); border-color: rgba(220, 38, 38, 0.35); }

/* ── Plan message feedback ─────────────────────────────── */
.plan-msg {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(22, 163, 74, 0.1);
  color: var(--color-success);
}
.plan-msg:empty { display: none; }

/* ── Model test message ────────────────────────────────── */
.model-msg {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 500;
  min-height: 20px;
  color: var(--color-text-sub);
}
.model-msg:not(:empty) {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

/* ── Badges ────────────────────────────────────────────── */
.badge-ok, .badge-err {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
}

.badge-ok  { color: var(--color-success); background: rgba(22,163,74,.08); }
.badge-err { color: var(--color-error);   background: rgba(220,38,38,.08); }

/* ── Mono values ───────────────────────────────────────── */
.mono { font-family: var(--font-mono); font-size: 12px; }

/* ── Loading / Empty State ─────────────────────────────── */
.state-loading, .state-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 48px 24px;
  color: var(--color-text-sub);
  font-size: 13px;
}

/* ── Card wrapper (for tables) ─────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

/* ── Reduced motion ────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ── Responsive (tablet narrow) ───────────────────────── */
@media (max-width: 640px) {
  .app-nav { width: 52px; padding: 12px 8px; }
  .tab span, .tab-label { display: none; }
  .tab { justify-content: center; padding: 10px; }
  .app-main { padding: 16px; }
  .app-header { padding: 0 16px; }
  .header-title { display: none; }
}