/* ============================================================
   tree-gen showcase — Vienna Secession exhibition catalogue
   ============================================================ */

@font-face {
  font-family: 'Della Respira';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('./fonts/della-respira-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Cormorant Garamond';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('./fonts/cormorant-garamond-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Cormorant Garamond';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('./fonts/cormorant-garamond-italic-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('./fonts/jetbrains-mono-latin.woff2') format('woff2');
}

:root {
  --paper:        #f1dfac;
  --paper-warm:   #ead3a0;
  --paper-deep:   #e0c98a;
  --paper-shade:  #d4b772;
  --card:         #f8ecc8;
  --card-frame:   #f3e6bd;

  --ink:          #1f1408;
  --ink-soft:     #4a3520;
  --ink-mute:     #6b4423;

  --gold:         #c89a3a;
  --gold-bright:  #f3e1a5;
  --gold-deep:    #8a6020;
  --gold-leaf:    linear-gradient(135deg, #8a6020 0%, #c89a3a 28%, #f3e1a5 52%, #c89a3a 76%, #8a6020 100%);

  --vermilion:    #a93226;
  --vermilion-deep:#7a2018;

  --frame:        rgba(138, 96, 32, 0.42);
  --frame-soft:   rgba(138, 96, 32, 0.18);
  --shadow-warm:  rgba(75, 44, 22, 0.18);

  --display:      'Della Respira', 'Trajan Pro', 'Optima', 'Hoefler Text', Georgia, serif;
  --serif:        'Cormorant Garamond', 'Hoefler Text', 'Big Caslon', Georgia, serif;
  --mono:         'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

/* ---------- reset ---------- */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at top left, rgba(243, 225, 165, 0.55), transparent 55%),
    radial-gradient(ellipse at 80% 30%, rgba(200, 154, 58, 0.10), transparent 60%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='320'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.45  0 0 0 0 0.32  0 0 0 0 0.10  0 0 0 0.05 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.9'/></svg>");
  background-attachment: fixed;
  min-height: 100vh;
}

::selection { background: var(--gold); color: var(--ink); }

a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px solid var(--frame); transition: color .2s, border-color .2s; }
a:hover { color: var(--vermilion); border-color: var(--vermilion); }

/* ---------- hero ---------- */

.page-header {
  position: relative;
  padding: 56px 48px 72px;
  border-bottom: 1px solid var(--frame);
  overflow: hidden;
}

.page-header::before,
.page-header::after {
  content: "";
  position: absolute;
  width: 140px;
  height: 140px;
  background:
    radial-gradient(circle at center, transparent 38%, var(--gold-deep) 39%, var(--gold-deep) 40%, transparent 41%),
    radial-gradient(circle at center, transparent 24%, var(--gold) 25%, var(--gold) 26%, transparent 27%),
    radial-gradient(circle at center, transparent 12%, var(--gold-deep) 13%, var(--gold-deep) 14%, transparent 15%);
  opacity: 0.5;
}
.page-header::before { top: 24px; left: 24px; }
.page-header::after  { bottom: 24px; right: 24px; transform: rotate(180deg); }

.hero-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 0.9fr);
  gap: 0 56px;
  align-items: end;
}

.hero-eyebrow {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 28px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 999px;
  background: var(--gold);
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 3px var(--gold-deep);
}

.page-header h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(72px, 14vw, 192px);
  line-height: 0.84;
  letter-spacing: -0.02em;
  margin: 0;
  background: var(--gold-leaf);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  text-shadow:
    0 1px 0 rgba(138, 96, 32, 0.12);
  filter: drop-shadow(0 2px 8px rgba(200, 154, 58, 0.18));
  animation: hero-rise 800ms cubic-bezier(.2,.7,.2,1) both;
}

.hero-rule {
  width: 1px;
  align-self: stretch;
  background: linear-gradient(180deg, transparent, var(--frame) 20%, var(--frame) 80%, transparent);
  margin-bottom: 6px;
}

.page-header .subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
  padding-bottom: 8px;
  max-width: 34ch;
  animation: hero-fade 1000ms ease-out 250ms both;
}

.hero-meta {
  grid-column: 1 / -1;
  margin: 48px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--frame-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  animation: hero-fade 1200ms ease-out 400ms both;
}
.hero-meta span strong {
  display: block;
  font-family: var(--display);
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-top: 4px;
  text-transform: none;
  font-weight: 400;
}

@keyframes hero-rise {
  from { opacity: 0; transform: translateY(8px) scale(0.99); letter-spacing: -0.04em; }
  to   { opacity: 1; transform: none; }
}
@keyframes hero-fade {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- layout ---------- */

main {
  padding: 16px 48px 72px;
  max-width: 1400px;
  margin: 0 auto;
  counter-reset: plate;
}

.section {
  margin: 88px 0;
  counter-increment: plate;
}

.section h2 {
  font-family: var(--display);
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink);
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 22px;
}

.section h2::before {
  content: "Plate " counter(plate, upper-roman);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--gold-deep);
  white-space: nowrap;
  padding-right: 18px;
  border-right: 1px solid var(--frame);
}

.section-note {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  margin: 0 0 32px;
  color: var(--ink-soft);
  max-width: 64ch;
}

.section-note code,
.reference code,
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--paper-deep);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--gold-deep);
  border: 1px solid var(--frame-soft);
}

/* ---------- preset gallery ---------- */

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px 22px;
}

.preset-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--frame);
  padding: 14px 14px 18px;
  box-shadow:
    0 1px 0 rgba(255, 245, 215, 0.5) inset,
    0 4px 14px var(--shadow-warm);
  transition: transform .25s cubic-bezier(.2,.7,.2,1), box-shadow .25s, border-color .25s;
  animation: card-rise 700ms cubic-bezier(.2,.7,.2,1) both;
  animation-delay: calc(var(--i, 0) * 40ms + 500ms);
}

.preset-card::before {
  /* ornate corner notches */
  content: "";
  position: absolute;
  inset: 4px;
  pointer-events: none;
  border: 1px solid var(--frame-soft);
}

.preset-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold);
  box-shadow:
    0 1px 0 rgba(255, 245, 215, 0.7) inset,
    0 10px 24px rgba(138, 96, 32, 0.25);
}

.preset-card .specimen-no {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-deep);
  background: var(--card);
  padding: 2px 7px;
  border: 1px solid var(--frame);
  border-radius: 999px;
  pointer-events: none;
}

.preset-card .preset-frame {
  position: relative;
  padding: 6px;
  background: var(--card-frame);
  border: 1px solid var(--frame);
}
.preset-card .preset-frame::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid var(--frame-soft);
  pointer-events: none;
}

.preset-card .preset-preview {
  width: 100%;
  aspect-ratio: 1 / 1.25;
  background: var(--paper);
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}

.preset-card .preset-preview svg {
  width: 100%;
  height: 100%;
  display: block;
}

.preset-card .preset-preview-loading {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-mute);
  opacity: 0.5;
}

.preset-card h3 {
  margin: 16px 4px 4px;
  font-family: var(--display);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.preset-card p {
  margin: 0 4px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.4;
}

@keyframes card-rise {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- playground ---------- */

.playground {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 32px;
  align-items: start;
}

@media (max-width: 1000px) {
  .playground { grid-template-columns: 1fr; }
}

.controls-panel {
  position: sticky;
  top: 16px;
  background: var(--card);
  border: 1px solid var(--frame);
  padding: 22px 22px 18px;
  max-height: 86vh;
  overflow-y: auto;
  box-shadow:
    0 1px 0 rgba(255, 245, 215, 0.5) inset,
    0 6px 18px var(--shadow-warm);
  scrollbar-width: thin;
  scrollbar-color: var(--gold-deep) transparent;
}

.controls-panel::before {
  content: "FIELD NOTEBOOK";
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.36em;
  color: var(--gold-deep);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--frame);
  text-align: center;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--frame-soft);
}
.control:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.control .label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.control label {
  font-family: var(--display);
  font-weight: 400;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
}

.control .value {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gold-deep);
  letter-spacing: 0.02em;
}

/* slider */
.control input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
}
.control input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold) 50%, var(--gold-bright));
  border-radius: 0;
}
.control input[type="range"]::-moz-range-track {
  height: 2px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold) 50%, var(--gold-bright));
}
.control input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 999px;
  background: var(--gold-leaf);
  border: 1px solid var(--gold-deep);
  margin-top: -6px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.18);
}
.control input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 999px;
  background: var(--gold);
  border: 1px solid var(--gold-deep);
}

.control input[type="number"],
.control input[type="text"] {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--frame);
  border-radius: 0;
  background: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  transition: border-color .2s, background .2s;
}
.control input[type="number"]:focus,
.control input[type="text"]:focus {
  outline: none;
  border-color: var(--gold);
  background: var(--card-frame);
}

.control .inline-row { display: flex; gap: 8px; }
.control .inline-row input { flex: 1; min-width: 0; }

/* the small randomize button inside the seed row, styled by controls.ts inline -> override via attribute selector */
.control .inline-row button {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-deep);
  background: var(--paper);
  border: 1px solid var(--frame);
  padding: 6px 12px;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.control .inline-row button:hover {
  background: var(--gold-deep);
  color: var(--paper);
  border-color: var(--gold-deep);
}

.control .checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.control .checkboxes > label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: var(--paper);
  color: var(--gold-deep);
  border: 1px solid var(--frame);
  border-radius: 999px;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.control .checkboxes > label:has(input:checked) {
  background: var(--gold);
  color: var(--ink);
  border-color: var(--gold-deep);
}
.control .checkboxes input[type="checkbox"] {
  margin: 0;
  accent-color: var(--gold-deep);
  width: 11px; height: 11px;
}

.control .palette-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 12px;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-deep);
}
.control .palette-grid label {
  font-weight: 400;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold-deep);
  text-transform: uppercase;
}
.control .palette-grid input[type="color"] {
  width: 100%;
  height: 26px;
  padding: 0;
  border: 1px solid var(--frame);
  border-radius: 0;
  background: transparent;
  cursor: pointer;
}

/* preview as framed artwork */
.preview-column {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.preview {
  position: relative;
  background: var(--card);
  padding: 22px;
  border: 1px solid var(--gold-deep);
  outline: 1px solid var(--frame-soft);
  outline-offset: 6px;
  box-shadow:
    0 1px 0 rgba(255, 245, 215, 0.5) inset,
    0 12px 36px rgba(138, 96, 32, 0.22);
  min-height: 480px;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}

.preview::before,
.preview::after {
  /* corner specimens */
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: 1px solid var(--gold-deep);
}
.preview::before { top: -4px; left: -4px; border-right: none; border-bottom: none; }
.preview::after  { bottom: -4px; right: -4px; border-left: none; border-top: none; }

.preview svg {
  width: 100%;
  height: auto;
  max-height: 80vh;
  display: block;
  transition: opacity 150ms ease;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.actions button {
  position: relative;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 10px 18px;
  border: 1px solid var(--gold-deep);
  background: var(--gold-leaf);
  color: var(--ink);
  cursor: pointer;
  transition: transform .15s, box-shadow .2s, color .2s, background .25s;
  box-shadow: 0 2px 6px rgba(138, 96, 32, 0.2);
}
.actions button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(138, 96, 32, 0.3);
}
.actions button:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(138, 96, 32, 0.2) inset;
}

/* the vermilion accent — only on Randomize seed */
#btn-randomize {
  background: linear-gradient(180deg, #c94232 0%, #a93226 60%, #7a2018 100%);
  color: var(--paper);
  border-color: var(--vermilion-deep);
}
#btn-randomize:hover {
  color: #ffe8b8;
  background: linear-gradient(180deg, #d34a3a 0%, #b8392b 60%, #8a2818 100%);
}

.status {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  min-height: 1.6em;
  padding-left: 14px;
  border-left: 1px solid var(--frame);
}

/* ---------- options reference (specimen sheet) ---------- */

.reference-wrap {
  background: var(--card);
  border: 1px solid var(--frame);
  padding: 8px 0 0;
  box-shadow:
    0 1px 0 rgba(255, 245, 215, 0.5) inset,
    0 6px 18px var(--shadow-warm);
}

table.reference {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--serif);
  font-size: 15px;
}

table.reference th,
table.reference td {
  text-align: left;
  padding: 12px 18px;
  border-bottom: 1px solid var(--frame-soft);
  vertical-align: top;
}

table.reference tbody tr:nth-child(odd) {
  background: rgba(224, 201, 138, 0.18);
}

table.reference tbody tr:hover {
  background: rgba(200, 154, 58, 0.16);
}

table.reference th {
  background: var(--paper-warm);
  color: var(--gold-deep);
  font-family: var(--mono);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--frame);
}

table.reference td:first-child {
  white-space: nowrap;
  font-family: var(--display);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--ink);
}
table.reference td:first-child code {
  font-family: var(--display);
  background: transparent;
  border: none;
  padding: 0;
  color: var(--ink);
  font-size: 15px;
  letter-spacing: 0.04em;
}

table.reference td:nth-child(4) {
  font-style: italic;
  color: var(--ink-soft);
}

/* ---------- footer ---------- */

.page-footer {
  margin-top: 56px;
  padding: 40px 32px 56px;
  border-top: 1px solid var(--frame);
  text-align: center;
  color: var(--ink-mute);
  background:
    linear-gradient(180deg, transparent, rgba(138, 96, 32, 0.05));
}

.page-footer .colophon {
  font-family: var(--display);
  font-size: 22px;
  letter-spacing: 0.32em;
  color: var(--gold-deep);
  margin: 0 0 6px;
}

.page-footer .colophon-line {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.page-footer a {
  border-color: var(--frame);
}

/* ---------- responsive trim ---------- */

@media (max-width: 720px) {
  .page-header { padding: 36px 24px 48px; }
  .page-header::before, .page-header::after { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 18px; }
  .hero-rule { display: none; }
  main { padding: 8px 24px 48px; }
  .section { margin: 56px 0; }
  .section h2 { flex-direction: column; align-items: flex-start; gap: 6px; }
  .section h2::before { padding-right: 0; border-right: none; padding-bottom: 2px; }
  .controls-panel { position: static; max-height: none; }
  .preview { padding: 14px; min-height: 380px; }
}