/* ─────────────────────────────────────
   CSS Custom Properties
───────────────────────────────────── */
:root {
  --color-bg: #edebe4;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --color-accent: #3d7a6f;
  --color-accent-hover: #2d5a51;
  --color-border: #d4d0c8;
  --color-white: #ffffff;
  --font-display: 'Lora', serif;
  --font-body: 'Jost', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ─────────────────────────────────────
   Global Reset & Base
───────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

/* ─────────────────────────────────────
   Layout
───────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  padding: 0 2rem;
  height: 56px;
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
}

.header-tagline {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 80px 2rem 4rem;
}

.site-footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ─────────────────────────────────────
   State Management
───────────────────────────────────── */
.state {
  display: none;
}

.state.active {
  display: block;
}

/* ─────────────────────────────────────
   Typography
───────────────────────────────────── */
h1 {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-text);
}

h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.subtext {
  font-weight: 300;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

/* ─────────────────────────────────────
   Landing State
───────────────────────────────────── */
#state-landing {
  max-width: 600px;
  margin: 0 auto;
  padding-top: 3rem;
  text-align: left;
}

.decision-input {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  margin-bottom: 2.5rem;
  outline: none;
}

.decision-input:focus {
  border-color: var(--color-accent);
}

.archetype-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 2rem;
  border: 1px solid var(--color-border);
}

.archetype-row {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-white);
  flex-wrap: wrap;
}

.archetype-row:last-child {
  border-bottom: none;
}

.archetype-row:hover {
  background: #f5f3ee;
}

.archetype-row:has(input[type="radio"]:checked) {
  background: #f0f5f4;
  border-left: 3px solid var(--color-accent);
}

.archetype-row input[type="radio"] {
  margin-top: 3px;
  accent-color: var(--color-accent);
  flex-shrink: 0;
}

.archetype-title {
  font-weight: 500;
  font-size: 0.95rem;
  display: block;
  margin-bottom: 0.2rem;
}

.archetype-description {
  font-weight: 300;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: block;
  width: 100%;
}

.archetype-row .archetype-description {
  color: var(--color-text-muted) !important;
}

/* ─────────────────────────────────────
   Variables State
───────────────────────────────────── */
#state-variables {
  max-width: 680px;
  margin: 0 auto;
  padding-top: 2rem;
}

.archetype-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: #f0f5f4;
  padding: 0.25rem 0.625rem;
  display: inline-block;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
}

.variable-row {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 1.25rem;
  margin-bottom: 0.75rem;
}

.variable-row-header {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.875rem;
  align-items: center;
}

.input-variable-name {
  flex: 1;
  padding: 0.625rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
}

.input-variable-name:focus {
  border-color: var(--color-accent);
  background: var(--color-white);
}

.input-variable-unit {
  width: 120px;
  padding: 0.625rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
}

.input-variable-unit:focus {
  border-color: var(--color-accent);
  background: var(--color-white);
}

.variable-row-inputs {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.input-min,
.input-likely,
.input-best {
  flex: 1;
  min-width: 80px;
  padding: 0.625rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-align: right;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
}

.input-min:focus,
.input-likely:focus,
.input-best:focus {
  border-color: var(--color-accent);
  background: var(--color-white);
}

.input-helper {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 300;
  margin-top: 0.4rem;
  width: 100%;
}

.variable-row-weight {
  margin-top: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.input-weight {
  width: 100px;
  padding: 0.625rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-align: right;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
}

.input-weight:focus {
  border-color: var(--color-accent);
  background: var(--color-white);
}

.input-error {
  border-color: #c0392b !important;
  background: #fdf5f5 !important;
}

.variable-row-weight span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 300;
}

.btn-remove-row {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1;
  padding: 0.4rem 0.65rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s;
}

.btn-remove-row:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

/* ─────────────────────────────────────
   Running State
───────────────────────────────────── */
#state-running {
  text-align: center;
  padding-top: 5rem;
}

.spinner {
  width: 36px;
  height: 36px;
  margin: 2rem auto;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ─────────────────────────────────────
   Results State
───────────────────────────────────── */
.verdict-banner {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

.verdict-banner .section-label {
  margin-bottom: 0.4rem;
}

#verdict-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  margin: 0;
  line-height: 1.4;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.results-left .section-label,
.results-right .section-label {
  margin-bottom: 1rem;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
}

.btn-text {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 0.4rem 0;
  text-decoration: underline;
  margin-top: 0.5rem;
}

.btn-text:hover {
  color: var(--color-accent);
}

.explainer {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding: 0.875rem;
  background: #f5f3ee;
  border: 1px solid var(--color-border);
  margin-top: 0.5rem;
}

.stat-block {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

.stat-block:last-child {
  border-bottom: none;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-text);
}

.sensitivity-section {
  margin-bottom: 2.5rem;
}

#sensitivity-chart {
  margin-top: 1rem;
}

.narrative-section {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
}

.nudge-box {
  background: #f0f5f4;
  border-left: 3px solid var(--color-accent);
  padding: 0.875rem 1.25rem;
  margin-bottom: 1.25rem;
  font-weight: 500;
  font-size: 0.95rem;
  line-height: 1.5;
}

#narrative-text {
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
}

/* ─────────────────────────────────────
   Loading States
───────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

.loading {
  color: var(--color-text-muted);
  animation: pulse 1.5s ease-in-out infinite;
}

/* ─────────────────────────────────────
   Buttons
───────────────────────────────────── */
.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.02em;
  margin-top: 1.5rem;
  transition: background 0.15s;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
}

.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  background: var(--color-text-muted);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  cursor: pointer;
  margin-top: 1rem;
  transition: all 0.15s;
  display: inline-block;
}

.btn-secondary:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.back-link {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 300;
  cursor: pointer;
  display: inline-block;
  margin-bottom: 1.5rem;
  text-decoration: none;
}

.back-link:hover {
  color: var(--color-accent);
}

/* ─────────────────────────────────────
   Utilities
───────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ─────────────────────────────────────
   Responsive
───────────────────────────────────── */
@media (max-width: 720px) {
  .results-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 1.8rem;
  }

  .header-tagline {
    display: none;
  }

  main {
    padding: 72px 1.25rem 3rem;
  }
}

/* ─────────────────────────────────────
   Sensitivity Chart
───────────────────────────────────── */
.sensitivity-row {
  margin-bottom: 1rem;
}

.sensitivity-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.35rem;
}

.sensitivity-name {
  font-size: 0.9rem;
  font-weight: 400;
}

.sensitivity-pct {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.sensitivity-bar-track {
  height: 6px;
  background: var(--color-border);
  width: 100%;
}

.sensitivity-bar-fill {
  height: 6px;
  transition: width 0.4s ease;
}

.interpretation-panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  padding: 1.75rem 2rem;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.interpretation-panel.visible {
  opacity: 1;
  transform: translateY(0);
}

.interpretation-header {
  margin-bottom: 1rem;
}

.interpretation-summary {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  font-style: italic;
}

.interpretation-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.interpretation-bullet {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.bullet-icon {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.bullet-text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.5;
  color: var(--color-text);
}

.bullet-text strong {
  font-weight: 500;
  color: var(--color-text);
}

.interpretation-action {
  background: #f0f5f4;
  border-left: 3px solid var(--color-accent);
  padding: 1rem 1.25rem;
}

.action-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.4rem;
}

#action-text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  margin: 0;
  line-height: 1.5;
}