/* ============================================================
   Tokens
   ============================================================ */

:root {
  color-scheme: light dark;

  --color-bg:        #F8F9FB;
  --color-surface:   #FFFFFF;
  --color-border:    #E2E8F0;
  --color-text:      #0F172A;
  --color-muted:     #64748B;
  --color-accent:    #2563EB;

  --color-tc-text:   #3730A3;
  --color-tc-bg:     #EEF2FF;
  --color-tc-border: #C7D2FE;

  --color-te-text:   #92400E;
  --color-te-bg:     #FFFBEB;
  --color-te-border: #FDE68A;

  --color-asset-text:   #065F46;
  --color-asset-bg:     #ECFDF5;
  --color-asset-border: #A7F3D0;

  --color-loss-text:   #9B1C1C;
  --color-loss-bg:     #FEF2F2;
  --color-loss-border: #FECACA;

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

  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow:    0 1px 4px rgba(0,0,0,.08), 0 0 0 1px rgba(0,0,0,.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:      #0F172A;
    --color-surface: #1E293B;
    --color-border:  #334155;
    --color-text:    #F1F5F9;
    --color-muted:   #94A3B8;
    --color-accent:  #60A5FA;

    --color-tc-text:   #A5B4FC;
    --color-tc-bg:     #1E1B4B;
    --color-tc-border: #3730A3;

    --color-te-text:   #FCD34D;
    --color-te-bg:     #1C1200;
    --color-te-border: #92400E;

    --color-asset-text:   #6EE7B7;
    --color-asset-bg:     #022C22;
    --color-asset-border: #065F46;

    --color-loss-text:   #FCA5A5;
    --color-loss-bg:     #1C0A0A;
    --color-loss-border: #7F1D1D;

    --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
    --shadow:    0 1px 4px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.05);
  }
}

/* ============================================================
   Reset & base
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ============================================================
   Layout
   ============================================================ */

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 1.25rem 0;
  margin-bottom: 2.5rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

header h1 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.header-sub {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 1px;
}

nav {
  font-size: 0.875rem;
  color: var(--color-muted);
}

main {
  padding-bottom: 4rem;
}

/* ============================================================
   Sections
   ============================================================ */

#builder {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-sm);
}

#scenarios-section h2 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

/* ============================================================
   Builder header
   ============================================================ */

.builder-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
}

.builder-title-row h2 {
  font-size: 1rem;
  font-weight: 600;
}

/* ============================================================
   Form fields
   ============================================================ */

.field {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.optional {
  font-weight: 400;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.component-hint {
  display: block;
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 2px;
}

input[type="text"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
  cursor: pointer;
}

textarea {
  resize: vertical;
  min-height: 80px;
}

fieldset {
  border: none;
}

fieldset legend {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  width: 100%;
}

/* ============================================================
   Component grid
   ============================================================ */

.components-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 600px) {
  .components-grid {
    grid-template-columns: 1fr;
  }
}

.component-field[data-component="loss"] {
  grid-column: 1 / -1;
}

/* ============================================================
   Chips (component labels)
   ============================================================ */

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-right: 0.25rem;
}

.chip-tc {
  background: var(--color-tc-bg);
  color: var(--color-tc-text);
  border: 1px solid var(--color-tc-border);
}

.chip-te {
  background: var(--color-te-bg);
  color: var(--color-te-text);
  border: 1px solid var(--color-te-border);
}

.chip-asset {
  background: var(--color-asset-bg);
  color: var(--color-asset-text);
  border: 1px solid var(--color-asset-border);
}

.chip-loss {
  background: var(--color-loss-bg);
  color: var(--color-loss-text);
  border: 1px solid var(--color-loss-border);
}

/* ============================================================
   Loss type checkboxes
   ============================================================ */

.loss-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-top: 0.25rem;
}

@media (max-width: 600px) {
  .loss-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.loss-option {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: var(--color-bg);
}

.loss-option:hover {
  border-color: var(--color-loss-border);
  background: var(--color-loss-bg);
}

.loss-option input[type="checkbox"] {
  width: auto;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--color-loss-text);
  cursor: pointer;
}

.loss-option.checked {
  border-color: var(--color-loss-border);
  background: var(--color-loss-bg);
}

.loss-label-text {
  font-size: 0.825rem;
  font-weight: 500;
  line-height: 1.3;
}

.loss-label-desc {
  font-size: 0.75rem;
  color: var(--color-muted);
  line-height: 1.3;
}

/* ============================================================
   Narrative preview
   ============================================================ */

.narrative-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  min-height: 72px;
  font-size: 1rem;
  line-height: 1.7;
}

.narrative-placeholder {
  color: var(--color-muted);
  font-style: italic;
  font-size: 0.9rem;
}

.narrative-text {
  color: var(--color-text);
}

.narrative-context {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* Inline narrative tags */
.ntag {
  display: inline;
  padding: 0.1em 0.45em;
  border-radius: var(--radius-sm);
  font-weight: 600;
  white-space: nowrap;
}

.ntag-tc    { background: var(--color-tc-bg);    color: var(--color-tc-text); }
.ntag-te    { background: var(--color-te-bg);    color: var(--color-te-text); }
.ntag-asset { background: var(--color-asset-bg); color: var(--color-asset-text); }
.ntag-loss  { background: var(--color-loss-bg);  color: var(--color-loss-text); }

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-ghost {
  background: transparent;
  color: var(--color-muted);
  border-color: var(--color-border);
}

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

.btn-icon {
  background: transparent;
  color: var(--color-muted);
  border: none;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.btn-icon:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.btn-icon.danger:hover {
  background: var(--color-loss-bg);
  color: var(--color-loss-text);
}

.builder-actions {
  display: flex;
  gap: 0.75rem;
}

.hidden {
  display: none !important;
}

/* ============================================================
   Saved scenario cards
   ============================================================ */

.scenario-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s;
}

.scenario-card:hover {
  box-shadow: var(--shadow);
}

.scenario-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.scenario-card-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.scenario-card-actions {
  display: flex;
  gap: 0.25rem;
  flex-shrink: 0;
}

.scenario-card-narrative {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.scenario-card-context {
  font-size: 0.825rem;
  color: var(--color-muted);
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.scenario-card-meta {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 0.75rem;
}

/* ============================================================
   Empty state
   ============================================================ */

.empty-state {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.875rem;
  padding: 2rem 1rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
}

/* ============================================================
   About page
   ============================================================ */

nav a {
  color: var(--color-muted);
  font-size: 0.875rem;
}

body > main > nav {
  margin-bottom: 2rem;
}

article h1 { font-size: 1.5rem; margin-bottom: 1rem; }
article h2 { font-size: 1rem; font-weight: 600; margin: 1.75rem 0 0.5rem; }
article p  { margin-bottom: 0.75rem; color: var(--color-muted); font-size: 0.9rem; max-width: 64ch; }
article dl { margin-bottom: 1rem; }
article dt { font-weight: 600; font-size: 0.875rem; margin-top: 0.75rem; }
article dd { color: var(--color-muted); font-size: 0.875rem; margin-left: 1rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.875rem;
  margin: 0.75rem 0 1.5rem;
}

th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.775rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
}

td:first-child {
  font-weight: 500;
  color: var(--color-text);
}