/* ==========================================================================
   Shovel design system
   - Light-only ships; tokens are semantic so dark mode is a follow-up.
   - Aesthetic: Crisp SaaS (Linear-family) with sage brand.
   ========================================================================== */

/* === 1. TOKENS ============================================================ */

:root {
  color-scheme: light;

  /* Surface */
  --surface-1: #ffffff;
  --surface-2: #fafbfc;
  --surface-3: #f4f5f7;
  --surface-inverse: #0e0f12;

  /* Text */
  --text-primary: #0e0f12;
  --text-secondary: #2a2d33;
  --text-muted: #6e7079;
  --text-on-brand: #2d3d18;
  --text-on-inverse: #ffffff;

  /* Border */
  --border-subtle: #eef0f2;
  --border-default: #e6e7eb;
  --border-strong: #d2d4da;

  /* Brand — sage */
  --brand: #b8cf95;
  --brand-strong: #a5bf81;
  --brand-soft: #e3eed7;
  --brand-deep: #3d5126;
  --brand-ring: rgba(184, 207, 149, 0.4);
  --brand-ring-soft: rgba(184, 207, 149, 0.18);

  /* Status */
  --success: #1f5b3d;
  --success-soft: #eaf5ee;
  --success-border: #c4dfd0;
  --warning: #8d6520;
  --warning-soft: #fdf3df;
  --warning-border: #f0d9a3;
  --danger: #8a3415;
  --danger-soft: #fcebe5;
  --danger-border: #f0c4b3;
  --danger-ring: rgba(214, 95, 58, 0.16);

  /* Spacing (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(14, 15, 18, 0.04);

  /* Layout */
  --shell-max: 1120px;
  --shell-pad: 2.5rem;

  /* Typography */
  --font-sans: 'Inter', -apple-system, system-ui, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

/* === 2. RESET & BASE ====================================================== */

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

[hidden] { display: none !important; }

html { background: var(--surface-1); }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--surface-1);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; }

/* === 3. LAYOUT ============================================================ */

.shell {
  width: min(var(--shell-max), calc(100vw - var(--shell-pad)));
  margin: 0 auto;
}

.page {
  padding: var(--space-7) 0 var(--space-8);
}

.layout-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: minmax(0, 1.7fr) minmax(250px, 0.9fr);
  align-items: start;
}

.layout-grid--capture {
  grid-template-columns: minmax(0, 1.45fr) minmax(250px, 0.85fr);
}

.form-stack {
  display: grid;
  gap: var(--space-4);
}

/* === 4. TYPOGRAPHY ======================================================== */

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 1.55rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.1rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

p { margin: 0; line-height: 1.55; }

.lede,
.muted { color: var(--text-muted); }

.lede {
  margin-top: var(--space-3);
  max-width: 48rem;
  font-size: 1rem;
}

.idea-summary {
  color: var(--text-secondary);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

/* === 5. PAGE HEAD ========================================================= */

.page-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-4);
  align-items: end;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}

.page-head > :only-child {
  grid-column: 1 / -1;
  max-width: 52rem;
}

.section-head {
  display: grid;
  gap: var(--space-1);
  max-width: 40rem;
  margin-bottom: var(--space-4);
}

.section-head .eyebrow {
  margin-bottom: var(--space-1);
}

/* === 6. HEADER & NAV ====================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border-default);
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-sm);
  background: var(--brand);
  display: inline-block;
}

.brand-version {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-left: var(--space-1);
}

.nav {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.nav a {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color 140ms ease, color 140ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  background: var(--surface-3);
  color: var(--text-primary);
  outline: none;
}

/* === 7. BUTTONS =========================================================== */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.2;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--brand-strong);
  border-radius: var(--radius-md);
  background: var(--brand);
  color: var(--text-on-brand);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease;
}

.button:hover {
  background: var(--brand-strong);
}

.button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--brand-ring);
}

.button[disabled],
.button[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

.submit-spinner {
  width: 0.9rem;
  height: 0.9rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: submit-spin 700ms linear infinite;
}

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

.button--secondary {
  background: var(--surface-1);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.button--secondary:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
}

.button--ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: transparent;
}

.button--ghost:hover {
  background: var(--surface-3);
}

/* Inline button used inside form rows for follow-up actions. Compact. */
.link-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
}

.link-button:hover { text-decoration: underline; }

.link-button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--brand-ring);
  border-radius: var(--radius-sm);
}

/* === 8. PILLS & RANK ====================================================== */

.pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.18rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--surface-3);
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.pill--brand {
  background: var(--brand-soft);
  color: var(--brand-deep);
}

.pill--warning {
  background: var(--warning-soft);
  color: var(--warning);
}

.pill--success {
  background: var(--success-soft);
  color: var(--success);
}

.rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 22px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--surface-inverse);
  color: var(--text-on-inverse);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* === 9. FORM FIELDS ======================================================= */

.field {
  display: grid;
  gap: var(--space-2);
}

.field span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.8rem;
  font: inherit;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--surface-1);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.field textarea {
  resize: vertical;
  min-height: 7rem;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--border-strong);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-ring-soft);
  background: var(--surface-1);
}

/* === 10. ALERTS =========================================================== */

.alert {
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.5;
  border: 1px solid var(--border-default);
  background: var(--surface-2);
  color: var(--text-secondary);
}

.alert--info {
  background: var(--surface-2);
  border-color: var(--border-default);
  color: var(--text-secondary);
}

.alert--success {
  background: var(--success-soft);
  border-color: var(--success-border);
  color: var(--success);
  font-weight: 500;
}

.alert--warning {
  background: var(--warning-soft);
  border-color: var(--warning-border);
  color: var(--warning);
}

.alert--danger {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: var(--danger);
}

/* === 10.5 AUTH ============================================================ */

.auth-panel {
  width: min(100%, 420px);
}

/* === 11. IDEA ROW (list pattern, used on /ideas) ========================== */

.portfolio-section {
  margin-top: var(--space-7);
}

.portfolio-section + .portfolio-section {
  margin-top: var(--space-7);
}

.idea-list {
  display: grid;
  gap: 0;
}

.idea-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-5);
  align-items: start;
  padding: var(--space-5) 0;
  border-top: 1px solid var(--border-subtle);
  transition: background-color 140ms ease;
}

.idea-row:first-child {
  border-top: 0;
  padding-top: var(--space-3);
}

.idea-row:hover {
  background: var(--surface-2);
}

.idea-row__main {
  display: grid;
  gap: var(--space-2);
}

.idea-row__pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.idea-row__inline-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.idea-row__title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--text-primary);
}

.idea-row__title a {
  text-decoration: none;
  color: inherit;
}

.idea-row__title a:hover {
  text-decoration: underline;
  text-decoration-color: var(--brand);
  text-underline-offset: 3px;
}

.idea-row__summary {
  max-width: 56ch;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.idea-row__meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.idea-row__action {
  padding-top: 0.1rem;
}

/* === 12. REVIEW CONTROLS TOOLBAR ========================================== */

.review-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: end;
  margin-bottom: var(--space-5);
}

.review-controls__field {
  min-width: 14rem;
  max-width: 18rem;
}

.review-controls__checkbox {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.review-controls__checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--brand);
}

.review-controls__checkbox input:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--brand-ring);
}

/* === 13. EMPTY STATE ====================================================== */

.empty-state {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-5);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  align-items: start;
}

.empty-state--inline {
  padding: 0;
  border: 0;
  background: transparent;
}

.empty-state__copy {
  display: grid;
  gap: var(--space-2);
}

/* === 14. CONTEXT RAIL ===================================================== */

.context-rail {
  display: grid;
  gap: 0;
  align-content: start;
  padding: var(--space-5);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.context-rail--standalone {
  background: var(--surface-2);
}

.ctx {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border-subtle);
}

.ctx:first-child {
  padding-top: 0;
  border-top: 0;
}

.ctx:last-child {
  padding-bottom: 0;
}

.ctx__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin: 0;
}

.ctx__value {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  line-height: 1.15;
  margin: 0;
}

.ctx__desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: var(--space-1) 0 0;
}

.ctx form { margin-top: var(--space-3); }

/* === 15. EDITOR (form on /ideas/<id> and /ideas/new) ===================== */

.editor {
  display: grid;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-5);
  background: var(--surface-1);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.editor-section {
  display: grid;
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

.editor-section--compact {
  padding-top: 0;
  border-top: 0;
}

.editor-actions {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding-top: var(--space-2);
}

.form-assist {
  display: grid;
  gap: var(--space-1);
  align-content: center;
}

.form-note,
.submit-status {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.submit-status {
  color: var(--text-primary);
  font-weight: 500;
}

/* === 16. EVALUATION DIMENSIONS (show.html scorecard) ===================== */

.dimension-list {
  display: grid;
  gap: var(--space-3);
}

.dimension {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
}

.dimension__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.dimension__score {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.dimension__rationale {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.dimension__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin: 0;
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-subtle);
}

.dimension__meta div { display: grid; gap: var(--space-1); }

.dimension__meta dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.dimension__meta dd {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* `.panel` is a generic surface used for any remaining card-like containers
   not covered by editor/dimension/empty-state. Kept intentionally minimal. */
.panel {
  background: var(--surface-1);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-5);
}

/* === 17. QUESTION CARD (clarify page) ===================================== */

.question-card {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--surface-2);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
}

.question-card__section {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.question-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field--narrow {
  max-width: 14rem;
}

/* === 18. HISTORY (versions list) ========================================= */

.history-list {
  display: grid;
  gap: 0;
}

.history-entry {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-5) 0 var(--space-5) var(--space-4);
  border-top: 1px solid var(--border-subtle);
  border-left: 2px solid var(--brand-soft);
}

.history-entry:first-child {
  border-top: 0;
}

.history-entry__title {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}

.history-entry__summary {
  max-width: 58ch;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.history-entry__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* === 19. RESPONSIVE ====================================================== */

@media (max-width: 900px) {
  .page-head,
  .layout-grid,
  .layout-grid--capture,
  .idea-row {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .page {
    padding-top: var(--space-5);
  }

  .editor-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .question-grid {
    grid-template-columns: 1fr;
  }

  .dimension__meta {
    grid-template-columns: 1fr;
  }

  .context-rail {
    padding: var(--space-4);
  }

  .idea-row__action {
    padding-top: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --shell-pad: 1.5rem;
  }

  .page-head {
    gap: var(--space-3);
    padding-bottom: var(--space-4);
  }

  h1 {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
  }

  .editor,
  .panel,
  .empty-state,
  .context-rail {
    padding: var(--space-4);
  }

  .review-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .review-controls__field {
    max-width: none;
  }
}

.freeform-panel {
  background: var(--paper-deep, #fafafa);
  border: 1px solid var(--line, #e2e2e2);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1rem 0 1.5rem;
}

.freeform-panel h2 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
}

.freeform-panel__hint {
  color: var(--muted, #666);
  font-size: 0.9rem;
  margin: 0 0 0.75rem;
}

.freeform-panel textarea {
  width: 100%;
  font: inherit;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line, #d4d4d4);
  border-radius: 6px;
  resize: vertical;
  margin-bottom: 0.75rem;
}

.review-panel {
  background: var(--surface-strong, #fff);
  border: 1px solid var(--accent, #c8d6f0);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 0 0 1.5rem;
}

.review-panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.review-panel__notes {
  color: var(--muted, #555);
  font-style: italic;
  margin: 0 0 0.75rem;
}

.review-panel__source {
  margin: 0 0 1rem;
}

.review-panel__source pre {
  white-space: pre-wrap;
  background: var(--paper-deep, #f5f5f5);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
}

.review-row {
  border-top: 1px solid var(--line, #e2e2e2);
  padding: 0.75rem 0;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "label toggle"
    "diff diff";
  gap: 0.5rem 1rem;
}

.review-row__label {
  grid-area: label;
}

.review-row__rationale {
  display: block;
  color: var(--muted, #666);
  font-size: 0.85rem;
  margin-top: 0.15rem;
}

.review-row__toggle {
  grid-area: toggle;
  align-self: start;
  user-select: none;
}

.review-row__diff {
  grid-area: diff;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.review-row__cap {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted, #777);
  margin-bottom: 0.2rem;
}

.review-row__before pre,
.review-row__after pre,
.review-row__after textarea {
  white-space: pre-wrap;
  margin: 0;
  padding: 0.5rem 0.65rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

.review-row__before pre {
  background: var(--paper-deep, #f6f6f6);
  color: var(--muted, #555);
}

.review-row__after pre,
.review-row__after textarea {
  background: var(--success-soft, #eef7ec);
  color: inherit;
}

.review-row__after textarea {
  width: 100%;
  min-height: 5rem;
  resize: vertical;
  border: 1px solid transparent;
  font: inherit;
  line-height: 1.55;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.review-row__after textarea[data-overflowing="true"] {
  border-color: rgba(174, 205, 134, 0.65);
}

.review-row__after textarea:focus {
  outline: none;
  border-color: var(--sage-500);
  box-shadow: 0 0 0 3px rgba(174, 205, 134, 0.3);
}

.review-row__overflow-hint {
  margin-top: var(--space-1);
  color: var(--text-muted);
  font-size: 0.82rem;
}

.review-panel__actions,
.review-panel__discard {
  margin-top: 1rem;
}

.review-panel__empty {
  color: var(--muted, #555);
  margin: 0.5rem 0 1rem;
}