/* Lattice Dashboard — Dark-first, responsive, minimal */

:root {
  color-scheme: dark light;

  /* Semantic color tokens using light-dark() */
  --color-bg:            light-dark(#ffffff, #0f0f0f);
  --color-bg-surface:    light-dark(#f5f5f5, #1a1a1a);
  --color-bg-elevated:   light-dark(#ffffff, #242424);
  --color-text-primary:  light-dark(#111111, #e8e8e8);
  --color-text-secondary:light-dark(#555555, #999999);
  --color-text-muted:    light-dark(#888888, #666666);
  --color-border:        light-dark(#e0e0e0, #2a2a2a);
  --color-accent:        light-dark(#2563eb, #60a5fa);
  --color-accent-hover:  light-dark(#1d4ed8, #93bbfd);
  --color-success:       light-dark(#16a34a, #4ade80);
  --color-warning:       light-dark(#d97706, #fbbf24);
  --color-danger:        light-dark(#dc2626, #f87171);
  --color-muted:         light-dark(#9ca3af, #6b7280);

  --radius:    8px;
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --font-mono: 'SF Mono', 'Fira Code', ui-monospace, monospace;
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-text-primary);
  min-height: 100dvh;
  line-height: 1.5;
}

/* Layout */
.app {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100dvh;
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
  -webkit-user-select: none;
  user-select: none;
}

.topbar-brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-logout {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.8125rem;
  min-height: 44px;
}

.btn-logout:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text-secondary);
}

/* Tab nav */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 var(--space-lg);
  background: var(--color-bg-surface);
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-nav button {
  flex: 0 0 auto;
  padding: var(--space-sm) var(--space-md);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
}

.tab-nav button:hover { color: var(--color-text-primary); }

.tab-nav button.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Main content */
.main {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-lg);
}

/* Views */
.view { display: none; }
.view.active { display: block; }

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: var(--space-md);
}

/* Card */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: border-color 0.15s ease;
  cursor: pointer;
  content-visibility: auto;
  contain-intrinsic-size: auto 140px;
}

.card:hover { border-color: var(--color-accent); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
}

.card-branch {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
}

/* Status badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  flex-shrink: 0;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge-active {
  background: color-mix(in srgb, var(--color-success) 15%, transparent);
  color: var(--color-success);
}

.badge-waiting {
  background: color-mix(in srgb, var(--color-warning) 15%, transparent);
  color: var(--color-warning);
  animation: pulse 2s ease-in-out infinite;
}

.badge-idle {
  background: color-mix(in srgb, var(--color-muted) 15%, transparent);
  color: var(--color-muted);
}

.badge-completed {
  background: color-mix(in srgb, var(--color-text-muted) 10%, transparent);
  color: var(--color-text-muted);
}

.badge-abandoned {
  background: color-mix(in srgb, var(--color-danger) 15%, transparent);
  color: var(--color-danger);
}

.badge-tag {
  background: color-mix(in srgb, var(--color-accent) 15%, transparent);
  color: var(--color-accent);
  font-size: 0.6875rem;
}

.badge-tag::before { display: none; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Waiting card highlight */
.card.waiting {
  border-color: var(--color-warning);
  animation: pulse-border 2s ease-in-out infinite;
}

@keyframes pulse-border {
  0%, 100% { border-color: var(--color-warning); }
  50% { border-color: color-mix(in srgb, var(--color-warning) 30%, transparent); }
}

/* Project detail */
.detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.detail-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.detail-id {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.detail-section {
  margin-bottom: var(--space-xl);
}

.detail-section h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.checkpoint-block {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
}

.checkpoint-block dt {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-md);
}

.checkpoint-block dt:first-child { margin-top: 0; }

.checkpoint-block dd {
  color: var(--color-text-primary);
  margin-top: var(--space-xs);
}

.btn-back {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.8125rem;
  min-height: 44px;
}

.btn-back:hover { border-color: var(--color-text-secondary); }

/* Session list in detail view */
.session-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.session-item {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.session-item-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: flex;
  gap: var(--space-md);
}

/* Git state */
.git-state {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-muted);
}

.empty-state p {
  margin-top: var(--space-sm);
  font-size: 0.875rem;
}

/* Error banner */
.error-banner {
  background: var(--color-danger);
  color: #fff;
  text-align: center;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8125rem;
  font-weight: 500;
  display: none;
}

.error-banner.visible { display: block; }

/* Auth screen */
.auth-screen {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: var(--space-lg);
}


.auth-form {
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.auth-form h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.auth-form p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
}

.auth-form input {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
  min-height: 44px;
}

.auth-form input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.auth-form button {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}

.auth-form button:hover { background: var(--color-accent-hover); }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg,
    var(--color-bg-surface) 25%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-surface) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius);
}

@keyframes skeleton-pulse {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card { height: 120px; }

/* Detail view helpers (replaces inline styles for CSP compliance) */
.detail-tag { margin-top: 8px; }
.uncommitted-warning { color: var(--color-warning); }
.session-id-label { margin-left: 8px; font-size: 0.8125rem; color: var(--color-text-muted); }

/* Updated timestamp */
.last-updated {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}