@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Crimson+Pro:ital,wght@0,300;0,400;1,300&family=JetBrains+Mono:wght@300;400&display=swap');

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

/* ────────────────────────────────────────────────
   tokens
──────────────────────────────────────────────── */
:root {
  --bg:           #0d1612;
  --bg-card:      #131e19;
  --bg-card2:     #172219;
  --border:       #1f2e28;
  --border-hi:    #2e4438;

  --green:        #76b87a;
  --green-dim:    #3a6346;
  --amber:        #c8a45a;

  --text:         #ddd8cc;
  --text-sub:     #8a8a7e;
  --text-mono:    #6a9e78;

  --fox:    196, 90, 58;
  --rabbit: 74, 122, 172;
  --grass:  90, 158, 90;
  --desert: 184, 144, 42;

  --r: 8px;
  --shadow: 0 8px 32px rgba(0,0,0,.45);
}

html { scroll-behavior: smooth; }

/* ────────────────────────────────────────────────
   light theme overrides
──────────────────────────────────────────────── */
body.light {
  --bg:        #f0ede6;
  --bg-card:   #faf8f4;
  --bg-card2:  #f4f1eb;
  --border:    #d8d2c8;
  --border-hi: #b8b0a0;

  --green:     #3a7a40;
  --green-dim: #8ab890;

  --amber:     #8a6020;

  --text:      #1a1a16;
  --text-sub:  #6a6860;
  --text-mono: #3a7a40;
}

body {
  background: var(--bg);
  font-family: 'Crimson Pro', Georgia, serif;
  color: var(--text);
  min-height: 100vh;
  padding: 48px 24px 80px;
}

/* ────────────────────────────────────────────────
   layout
──────────────────────────────────────────────── */
.page-wrapper {
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 50px 56px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

/* ────────────────────────────────────────────────
   language bar — vertical, fixed top-right
──────────────────────────────────────────────── */
.lang-bar {
  position: fixed;
  top: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  z-index: 999;
}

.lang-tab {
  width: 36px;
  padding: 6px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-sub);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: .1em;
  cursor: pointer;
  text-align: center;
  transition: border-color .18s, color .18s, background .18s;
}
.lang-tab:hover  { border-color: var(--green-dim); color: var(--green); }
.lang-tab.active {
  background: var(--green-dim);
  border-color: var(--green-dim);
  color: #d5f0d5;
}

.theme-btn {
  width: 36px;
  padding: 5px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-sub);
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
  text-align: center;
  margin-top: 8px;
  transition: border-color .18s, color .18s, background .18s;
}
.theme-btn:hover { border-color: var(--green-dim); color: var(--green); }
body.light .theme-btn { content: '☾'; }
#theme-toggle { transition: transform .3s; }
#theme-toggle:hover { transform: rotate(20deg); }

/* ────────────────────────────────────────────────
   hero
──────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 24px 0 40px;
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--text-mono);
  margin-bottom: 20px;
}

.title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 56px;
  font-weight: 300;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 14px;
}
.title em {
  font-style: italic;
  color: var(--green);
}

.subtitle {
  font-size: 15px;
  font-style: italic;
  font-weight: 300;
  color: var(--text-sub);
}

/* ────────────────────────────────────────────────
   divider
──────────────────────────────────────────────── */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 32px 0;
}
.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider-mark {
  width: 4px; height: 4px;
  background: var(--green-dim);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ────────────────────────────────────────────────
   base card
──────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 26px 30px;
  transition: border-color .2s;
}
.card:hover { border-color: var(--border-hi); }

/* ────────────────────────────────────────────────
   intro card
──────────────────────────────────────────────── */
.intro-card {
  margin-bottom: 0;
  line-height: 1.85;
}

.intro-card .card-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-mono);
  margin-bottom: 16px;
}

.intro-card p {
  font-size: 15px;
  color: #a8a49a;
  margin-bottom: 10px;
}
body.light .intro-card p { color: #3a3830; }
.intro-card p:last-child { margin-bottom: 0; }
.intro-card strong { color: var(--text); font-weight: 400; }

.eq-block {
  text-align: center;
  padding: 18px 0;
  margin: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--amber);
  font-size: 16px;
}

.legend-pills {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: .05em;
  color: var(--text-sub);
}
.pill-dot {
  width: 9px; height: 9px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* ────────────────────────────────────────────────
   two control cards side-by-side
──────────────────────────────────────────────── */
.controls-row {
  display: flex;
  gap: 16px;
}
.controls-row .card { flex: 1; }

.card-label {
  display: block;
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .01em;
  text-transform: none;
  color: var(--text);
  margin-bottom: 22px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* sliders — two-column grid so tracks align */
.slider-row {
  display: grid;
  grid-template-columns: minmax(110px, 42%) 1fr;
  align-items: center;
  column-gap: 16px;
  margin-bottom: 16px;
}
.slider-row:last-child { margin-bottom: 0; }

.slider-row label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 13.5px;
  color: #9a9690;
}

.slider-row input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--border-hi);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.slider-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px var(--bg-card), 0 0 0 4px var(--green-dim);
  transition: box-shadow .15s, transform .15s;
}
.slider-row input[type=range]:hover::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px var(--bg-card), 0 0 0 5px var(--green);
  transform: scale(1.2);
}

.val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--amber);
  min-width: 36px;
  text-align: right;
}

/* ────────────────────────────────────────────────
   action row
──────────────────────────────────────────────── */
.action-row {
  display: flex;
  justify-content: flex-end;
  margin: 16px 0 28px;
}

#restart_button {
  padding: 9px 30px;
  background: transparent;
  border: 1px solid var(--green-dim);
  border-radius: 4px;
  color: var(--green);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: color .2s, border-color .2s;
}
#restart_button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--green-dim);
  opacity: 0;
  transition: opacity .2s;
}
#restart_button:hover { border-color: var(--green); color: #d5f0d5; }
#restart_button:hover::after { opacity: 1; }
#restart_button span { position: relative; z-index: 1; }

/* ────────────────────────────────────────────────
   simulation box
──────────────────────────────────────────────── */
.canvas-section {
  display: flex;
  justify-content: center;
}

.simulation-box {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
  box-shadow: var(--shadow), 0 0 60px rgba(90,180,90,.04);
  transition: border-color .2s;
}
.simulation-box:hover { border-color: var(--border-hi); }

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.sim-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-mono);
}

.sim-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px rgba(118,184,122,.6);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px rgba(118,184,122,.6); }
  50%       { opacity: .5; box-shadow: 0 0 2px rgba(118,184,122,.2); }
}

#sketch_box canvas {
  display: block;
  border-radius: 4px;
}