:root {
  --paper: #111110;
  --paper-deep: #0D0C0B;
  --ink: #E4DDD4;
  --ink-muted: #9A9188;
  --terracotta: #C77B52;
  --gold: #B8893E;
  --rule: rgba(228, 221, 212, 0.08);
  --tile: rgba(228, 221, 212, 0.04);
}

@media (prefers-color-scheme: light) {
  :root {
    --paper:      #F4EBDD;
    --paper-deep: #EADFCC;
    --ink:        #1F1611;
    --ink-muted:  #5C4B3F;
    --terracotta: #B23A1F;
    --gold:       #B8893E;
    --rule:       rgba(31, 22, 17, 0.16);
    --tile:       rgba(31, 22, 17, 0.04);
  }
}

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

body {
  font-family: 'Newsreader', Georgia, serif;
  font-weight: 380;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(199,123,82,0.05), transparent 42%),
    radial-gradient(circle at 88% 82%, rgba(184,137,62,0.04), transparent 45%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1.5rem, 5vw, 4rem) clamp(3rem, 8vw, 6rem);
}

/* ---- topbar ---- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding-bottom: clamp(2rem, 6vw, 3.5rem);
  border-bottom: 1px solid var(--rule);
  gap: 1rem;
}
.topbar-name { color: var(--ink-muted); text-decoration: none; transition: color 0.2s ease; }
.topbar-name:hover { color: var(--terracotta); }
.topbar .domain { color: var(--terracotta); }

/* ---- hero ---- */
.hero {
  margin-top: clamp(2.5rem, 7vw, 4.5rem);
  max-width: 40rem;
}
.kicker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}
.kicker::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: var(--terracotta);
}
h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-variation-settings: "SOFT" 50, "opsz" 144;
  font-weight: 380;
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
  color: var(--ink);
}
h1 .em {
  font-style: italic;
  font-variation-settings: "SOFT" 90, "opsz" 100;
  color: var(--terracotta);
}
.tagline {
  font-family: 'Newsreader', serif;
  font-size: clamp(1.12rem, 1.7vw, 1.32rem);
  line-height: 1.55;
  color: var(--ink);
  max-width: 44ch;
  margin: 0;
  font-weight: 400;
}
.tagline .em { font-style: italic; color: var(--terracotta); }

/* ---- form ---- */
.name-form {
  margin-top: clamp(2.5rem, 7vw, 4rem);
}
.field-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.9rem;
}
.field-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.name-input {
  flex: 1 1 16rem;
  min-width: 0;
  font-family: 'Fraunces', Georgia, serif;
  font-variation-settings: "SOFT" 40, "opsz" 40;
  font-size: 1.4rem;
  font-weight: 380;
  color: var(--ink);
  background: var(--tile);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.7rem 1rem;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.name-input::placeholder { color: var(--ink-muted); opacity: 0.55; font-style: italic; }
.name-input:focus {
  outline: none;
  border-color: var(--terracotta);
  background: transparent;
}
.submit-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--terracotta);
  border: 1px solid var(--terracotta);
  border-radius: 3px;
  padding: 0 1.3rem;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}
.submit-btn:hover { background: transparent; color: var(--terracotta); }
.submit-btn:hover .arrow { transform: translateX(4px); }
.submit-btn .arrow { display: inline-block; transition: transform 0.25s ease; }
.field-hint {
  margin: 0.9rem 0 0;
  font-size: 0.92rem;
  font-style: italic;
  color: var(--ink-muted);
}

/* ---- shared section label ---- */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--terracotta);
  margin-bottom: 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.section-label::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: var(--terracotta);
  flex-shrink: 0;
}

/* ---- result ---- */
.result {
  margin-top: clamp(2.5rem, 7vw, 4rem);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  pointer-events: none;
}
.result.shown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.result:not(.shown) { display: none; }

.step { margin-bottom: 2.4rem; }
.step-tag {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1rem;
}

/* letter tiles */
.tiles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 3rem;
  padding: 0.6rem 0.5rem 0.5rem;
  background: var(--tile);
  border: 1px solid var(--rule);
  border-radius: 3px;
  opacity: 0;
  animation: tilePop 0.45s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
  animation-delay: calc(var(--i) * 55ms);
}
.tile-letter {
  font-family: 'Fraunces', serif;
  font-variation-settings: "SOFT" 60, "opsz" 60;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ink);
}
.tile-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: var(--terracotta);
  margin-top: 0.35rem;
}
@keyframes tilePop {
  from { opacity: 0; transform: translateY(8px) scale(0.94); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* sum line */
.sum-line {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-muted);
  margin: 0;
  word-spacing: 0.1em;
}
.sum-line .equals { color: var(--ink-muted); margin: 0 0.3rem; }
.sum-total {
  font-family: 'Fraunces', serif;
  font-size: 1.5rem;
  font-style: italic;
  color: var(--terracotta);
  font-variation-settings: "SOFT" 80, "opsz" 60;
}

/* reduction chain */
.chain {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
}
.chain-step {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  flex-wrap: wrap;
}
.chain-work {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  color: var(--ink-muted);
}
.chain-num {
  font-family: 'Fraunces', serif;
  font-variation-settings: "SOFT" 70, "opsz" 80;
  font-size: 1.6rem;
  color: var(--ink);
}
.chain-root { color: var(--terracotta); font-style: italic; }
.chain-note {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ink-muted);
}
.chain-arrow {
  color: var(--ink-muted);
  font-size: 1rem;
  opacity: 0.6;
  margin: 0.1rem 0 0.1rem 0.4rem;
}

/* verdict */
.verdict {
  margin-top: 2.8rem;
  padding-top: 2.2rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.verdict-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.verdict-number {
  font-family: 'Fraunces', serif;
  font-variation-settings: "SOFT" 100, "opsz" 144;
  font-weight: 400;
  font-size: clamp(5rem, 22vw, 9rem);
  line-height: 1;
  color: var(--terracotta);
  margin: 0.4rem 0 0.8rem;
}
.verdict-meaning {
  font-family: 'Newsreader', serif;
  font-style: italic;
  font-size: 1.15rem;
  color: var(--ink);
  max-width: 36ch;
}
.verdict-compound {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: 1rem;
}

.no-letters {
  font-style: italic;
  color: var(--ink-muted);
  font-size: 1.1rem;
}

/* ---- key table ---- */
.key {
  margin-top: clamp(3.5rem, 9vw, 6rem);
  padding-top: clamp(2.5rem, 7vw, 4rem);
  border-top: 1px solid var(--rule);
}
.key-intro {
  margin: 0 0 1.8rem;
  font-style: italic;
  color: var(--ink-muted);
  max-width: 52ch;
}
.key-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 3px;
  overflow: hidden;
}
.key-cell {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding: 0.9rem 1rem;
  background: var(--paper);
}
.key-num {
  font-family: 'Fraunces', serif;
  font-variation-settings: "SOFT" 80, "opsz" 60;
  font-style: italic;
  font-size: 1.5rem;
  color: var(--terracotta);
  width: 1.2rem;
  flex-shrink: 0;
}
.key-letters {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  color: var(--ink);
}

/* ---- footer ---- */
footer {
  margin-top: clamp(4rem, 10vw, 6.5rem);
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--ink-muted);
}
.colophon-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.colophon-left, .colophon-right {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.colophon-right { align-items: flex-end; text-align: right; }
.colophon-right .signature {
  font-family: 'Fraunces', serif;
  font-variation-settings: "SOFT" 100, "opsz" 36;
  font-style: italic;
  font-size: 1.18rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--terracotta);
  font-weight: 420;
  margin-bottom: 0.35rem;
}
.colophon-right .alias { opacity: 0.85; }
.footer-note {
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  opacity: 0.6;
  text-transform: none;
  font-style: normal;
}

/* ---- responsive ---- */
@media (max-width: 600px) {
  .colophon-row { flex-direction: column; gap: 1.4rem; align-items: flex-start; }
  .colophon-right { align-items: flex-start; text-align: left; }
  .submit-btn { padding: 0.7rem 1.3rem; }
}

@media (prefers-reduced-motion: reduce) {
  .result, .tile { animation: none; transition: none; opacity: 1; transform: none; }
}

::selection { background: var(--terracotta); color: var(--paper); }