/* ChiLink Hub — Component patterns
---------------------------------------------------- */

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  font-family: var(--font-sans);
  text-decoration: none;
}
.btn:disabled, .btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); color: var(--text-inverse); }

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 0.5px solid var(--border-default);
  padding: 8px 14px;
  font-weight: 400;
}
.btn-secondary:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--bg-surface-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 6px 10px;
}
.btn-ghost:hover:not(:disabled) { background: var(--bg-surface-hover); color: var(--text-primary); }

.btn-danger {
  background: transparent;
  color: var(--status-danger);
  border: 0.5px solid rgba(216,122,90,0.3);
}
.btn-danger:hover:not(:disabled) {
  background: var(--status-danger-bg);
  border-color: var(--status-danger);
}

.btn-sm { padding: 5px 10px; font-size: 11px; }
.btn-lg { padding: 11px 20px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------- Status pills ---------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  line-height: 1.5;
  white-space: nowrap;
}
.pill::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.85;
}
.pill-plain::before { display: none; }

.pill-success { background: var(--status-success-bg); color: var(--status-success); }
.pill-warning { background: var(--status-warning-bg); color: var(--status-warning); }
.pill-danger { background: var(--status-danger-bg); color: var(--status-danger); }
.pill-info { background: var(--status-info-bg); color: var(--status-info); }
.pill-accent { background: var(--accent-bg); color: var(--accent); }
.pill-muted { background: var(--bg-surface-hover); color: var(--text-tertiary); }

/* ---------- Cards ---------- */

.card {
  background: var(--bg-surface-raised);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}
.card-tight { padding: var(--space-4); }
.card-lg { padding: var(--space-8); }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 0.5px solid var(--border-subtle);
}
.card-head h2, .card-head h3 { margin: 0; }

/* Stat card */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.stat-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.stat-value {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.stat-footnote { font-size: 12px; color: var(--text-tertiary); }

/* ---------- Forms ---------- */

.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--space-4); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

label, .form-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.form-input, .form-select, .form-textarea {
  height: 36px;
  padding: 0 12px;
  font-size: 13px;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-surface-raised);
  border: 0.5px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}
.form-textarea {
  height: auto;
  min-height: 80px;
  padding: 10px 12px;
  line-height: 1.6;
  resize: vertical;
}
.form-select { cursor: pointer; appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-tertiary) 50%), linear-gradient(135deg, var(--text-tertiary) 50%, transparent 50%); background-position: calc(100% - 14px) center, calc(100% - 9px) center; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; padding-right: 28px; }
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}
.form-input.has-error, .form-select.has-error, .form-textarea.has-error {
  border-color: var(--status-danger);
}
.form-error { font-size: 12px; color: var(--status-danger); margin-top: 4px; text-transform: none; letter-spacing: 0; font-weight: 400; }
.form-hint { font-size: 12px; color: var(--text-tertiary); margin-top: 4px; text-transform: none; letter-spacing: 0; font-weight: 400; }

/* Checkbox + radio */
.check-group { display: flex; align-items: center; gap: var(--space-2); }
.check-group input[type="checkbox"], .check-group input[type="radio"] {
  width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer;
}
.check-group label { text-transform: none; letter-spacing: 0; font-size: 13px; color: var(--text-primary); font-weight: 400; cursor: pointer; }

/* ---------- Tables ---------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table thead tr {
  border-bottom: 0.5px solid var(--border-default);
}
.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.data-table td {
  padding: 13px 12px;
  border-bottom: 0.5px solid var(--border-subtle);
  vertical-align: middle;
}
.data-table tbody tr:hover { background: var(--bg-surface-hover); }
.data-table .col-numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-serif);
}
.data-table .col-id {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}
.data-table .col-actions { text-align: right; width: 1%; white-space: nowrap; }

.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--text-tertiary);
}

/* ---------- Flash / toast ---------- */

.flash {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: var(--space-4);
  border: 0.5px solid transparent;
}
.flash-success { background: var(--status-success-bg); color: var(--status-success); border-color: rgba(168,198,142,0.3); }
.flash-error { background: var(--status-danger-bg); color: var(--status-danger); border-color: rgba(216,122,90,0.3); }
.flash-warning { background: var(--status-warning-bg); color: var(--status-warning); }
.flash-info { background: var(--status-info-bg); color: var(--status-info); }

.toast-stack {
  position: fixed;
  bottom: 24px; right: 24px;
  display: flex; flex-direction: column;
  gap: 8px; z-index: 1000;
  max-width: 360px;
}
.toast {
  background: var(--bg-surface-raised);
  border: 0.5px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 13px;
  box-shadow: var(--shadow-md);
  animation: toast-in 220ms ease;
}
@keyframes toast-in {
  from { transform: translateY(8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ---------- Layout shell ---------- */

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

.sidebar {
  background: var(--bg-surface);
  border-right: 0.5px solid var(--border-subtle);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4) var(--space-6);
}
.sidebar-brand-mark {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.sidebar-brand-mark em {
  font-style: italic;
  color: var(--accent);
}

.nav-group {
  margin-bottom: var(--space-6);
  padding: 0 var(--space-2);
}
.nav-group-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  margin-bottom: var(--space-2);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.nav-group-label .nav-group-num {
  font-family: var(--font-mono);
  color: var(--text-tertiary);
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  margin: 1px var(--space-2);
  font-size: 13px;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.nav-item:hover { background: var(--bg-surface-hover); color: var(--text-primary); }
.nav-item.active {
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 500;
}
.nav-item-label { display: flex; align-items: center; gap: 10px; }
.nav-item-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.topbar {
  height: var(--topbar-height);
  background: var(--bg-canvas);
  border-bottom: 0.5px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: 50;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-tertiary);
}
.breadcrumbs a { color: var(--text-tertiary); }
.breadcrumbs a:hover { color: var(--text-primary); }
.breadcrumbs .current { color: var(--text-primary); }
.breadcrumbs .sep { opacity: 0.4; }

.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 8px 4px 4px;
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
}
.user-menu:hover { background: var(--bg-surface-hover); color: var(--text-primary); }
.user-menu-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent-bg);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 500;
  font-size: 12px;
  font-family: var(--font-mono);
}

.main {
  padding: var(--space-8) var(--space-8) var(--space-12);
  max-width: 1400px;
}

.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 0.5px solid var(--border-subtle);
}
.page-head .title-group h1 { margin-bottom: var(--space-2); }
.page-head .subtitle { color: var(--text-secondary); font-size: 13px; }
.page-head-actions { display: flex; gap: var(--space-2); }

/* ---------- Theme toggle ---------- */

.theme-toggle {
  margin: 0 var(--space-4) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 11px;
  color: var(--text-tertiary);
}
.theme-toggle-switch {
  position: relative;
  width: 26px; height: 14px;
  background: var(--border-default);
  border-radius: 10px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  border: none; padding: 0;
}
.theme-toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--text-primary);
  transition: transform var(--transition-fast);
}
:root[data-theme="dark"] .theme-toggle-switch::after { transform: translateX(12px); background: var(--accent); }

/* ---------- Utility ---------- */

.stack-2 { display: flex; flex-direction: column; gap: var(--space-2); }
.stack-3 { display: flex; flex-direction: column; gap: var(--space-3); }
.stack-4 { display: flex; flex-direction: column; gap: var(--space-4); }
.stack-6 { display: flex; flex-direction: column; gap: var(--space-6); }
.row { display: flex; align-items: center; gap: var(--space-3); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.grow { flex: 1; }
.divider { height: 0.5px; background: var(--border-subtle); margin: var(--space-4) 0; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
@media (max-width: 900px) { .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.text-right { text-align: right; }
.text-center { text-align: center; }

.hidden { display: none !important; }

/* ---------- Typeahead ---------- */

.typeahead {
  position: relative;
}
.ta-input-wrap { position: relative; }
.ta-clear {
  position: absolute;
  right: 8px; top: 50%;
  transform: translateY(-50%);
  width: 20px; height: 20px;
  background: var(--bg-surface-hover);
  border: none; border-radius: 50%;
  color: var(--text-tertiary);
  font-size: 14px; line-height: 1;
  cursor: pointer;
}
.ta-clear:hover { background: var(--border-default); color: var(--text-primary); }

.ta-results {
  position: absolute;
  top: calc(100% + 4px); left: 0; right: 0;
  max-height: 360px; overflow-y: auto;
  background: var(--bg-surface-raised);
  border: 0.5px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  z-index: 100;
  padding: 4px;
}
.ta-result {
  display: flex; flex-direction: column; align-items: flex-start;
  width: 100%;
  padding: 8px 10px;
  background: transparent; border: none; border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  gap: 4px;
  transition: background-color var(--transition-fast);
}
.ta-result:hover, .ta-result.is-active { background: var(--accent-bg); }
.ta-result-main { font-size: 13px; color: var(--text-primary); font-weight: 500; }
.ta-result-meta {
  display: flex; align-items: center; gap: 8px;
  font-size: 11px; color: var(--text-tertiary);
  flex-wrap: wrap;
}
.ta-empty {
  padding: 16px; text-align: center;
  color: var(--text-tertiary); font-size: 12px;
}
.ta-selected {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px;
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  gap: 12px;
}
.ta-selected-main { font-size: 14px; color: var(--text-primary); font-weight: 500; }

/* ---------- Command palette ---------- */

#command-palette {
  position: fixed; inset: 0;
  display: none;
  z-index: 200;
}
#command-palette.is-open { display: block; }
#command-palette .cp-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
:root[data-theme="dark"] #command-palette .cp-backdrop { background: rgba(0,0,0,0.55); }
#command-palette .cp-panel {
  position: relative;
  max-width: 560px; margin: 12vh auto 0;
  background: var(--bg-surface-raised);
  border: 0.5px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: cp-in 180ms ease;
}
@keyframes cp-in {
  from { transform: translateY(-8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
#command-palette .cp-input-wrap {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  border-bottom: 0.5px solid var(--border-subtle);
  color: var(--text-secondary);
}
#command-palette .cp-input {
  flex: 1;
  background: transparent; border: none; outline: none;
  font-family: var(--font-sans); font-size: 15px;
  color: var(--text-primary);
}
#command-palette .cp-input::placeholder { color: var(--text-tertiary); }
#command-palette .cp-kbd {
  font-family: var(--font-mono); font-size: 10px;
  padding: 3px 6px;
  background: var(--bg-surface);
  border: 0.5px solid var(--border-default);
  border-radius: 3px;
  color: var(--text-tertiary);
}
#command-palette .cp-list {
  max-height: 50vh; overflow-y: auto;
  padding: 6px;
}
#command-palette .cp-item {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 9px 12px;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-primary); font-size: 13px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
  text-align: left;
}
#command-palette .cp-item.is-active, #command-palette .cp-item:hover {
  background: var(--accent-bg);
}
#command-palette .cp-hint {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-tertiary);
}
#command-palette .cp-empty {
  padding: 20px; text-align: center; color: var(--text-tertiary); font-size: 13px;
}
#command-palette .cp-footer {
  padding: 10px 16px;
  border-top: 0.5px solid var(--border-subtle);
  font-size: 11px; color: var(--text-tertiary);
  display: flex; justify-content: space-between;
}
#command-palette .cp-footer kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 5px;
  background: var(--bg-surface);
  border: 0.5px solid var(--border-default);
  border-radius: 3px;
  margin: 0 2px;
}

/* ---------- Toast-styled flash ---------- */

.flash {
  position: relative;
  padding-right: 36px;
  animation: flash-in 220ms ease;
}
@keyframes flash-in {
  from { transform: translateY(-6px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.flash-dismiss {
  position: absolute; top: 50%; right: 12px;
  transform: translateY(-50%);
  width: 20px; height: 20px;
  background: transparent; border: none; cursor: pointer;
  color: inherit; opacity: 0.6;
  font-size: 16px; line-height: 1;
}
.flash-dismiss:hover { opacity: 1; }