:root {
  --bg: #f5f0e6;
  --paper: #fffaf0;
  --paper-2: #f2eadb;
  --ink: #16231b;
  --muted: #6a746b;
  --forest: #184e3a;
  --forest-dark: #0d2f24;
  --mint: #7bc9a9;
  --gold: #c58b2c;
  --gold-soft: #f1d7a6;
  --danger: #b84a4a;
  --success: #2f8f57;
  --line: rgba(24, 78, 58, 0.18);
  --line-strong: rgba(197, 139, 44, 0.55);
  --shadow: 0 24px 70px rgba(28, 41, 28, 0.16);
  --radius: 26px;
  --mono: "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 10%, rgba(123, 201, 169, 0.45), transparent 28rem),
    radial-gradient(circle at 88% 6%, rgba(197, 139, 44, 0.26), transparent 30rem),
    linear-gradient(135deg, #f6efe1 0%, #edf6ee 55%, #fbf6eb 100%);
}

a { color: inherit; text-decoration: none; }
button, select, textarea { font: inherit; }
code, .result-value { font-family: var(--mono); word-break: break-all; }

.app-shell {
  display: grid;
  grid-template-columns: minmax(300px, 420px) minmax(0, 1fr);
  gap: 24px;
  max-width: 1480px;
  margin: 0 auto;
  padding: 28px;
}

.side-hero {
  position: sticky;
  top: 24px;
  min-height: calc(100vh - 56px);
  border: 1px solid var(--line);
  border-radius: 34px;
  background: linear-gradient(180deg, rgba(255,250,240,0.95), rgba(234,244,235,0.92));
  box-shadow: var(--shadow);
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  overflow: hidden;
}
.side-hero::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  right: -70px;
  top: -70px;
  background: rgba(197, 139, 44, 0.16);
  pointer-events: none;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
  z-index: 1;
}
.brand-icon {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fffaf0;
  background: linear-gradient(135deg, var(--forest), var(--gold));
  font-weight: 950;
  letter-spacing: -0.06em;
  box-shadow: 0 16px 30px rgba(24, 78, 58, 0.25);
}
.logo-wrap strong { display: block; font-size: 1.08rem; }
.logo-wrap small { display: block; color: var(--muted); margin-top: 3px; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: .76rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 950;
}
.hero-copy h1 {
  margin: 8px 0 14px;
  font-size: clamp(2.1rem, 4.6vw, 4.7rem);
  line-height: .96;
  letter-spacing: -.07em;
  color: var(--forest-dark);
}
.hero-copy p, .muted {
  color: var(--muted);
  line-height: 1.7;
}
.sample-board {
  position: relative;
  z-index: 1;
  border-radius: 24px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #fff7e5, rgba(255,255,255,.58));
  padding: 18px;
}
.sample-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}
.sample-head span { color: var(--muted); font-weight: 800; }
.sample-head b { color: var(--forest); }
dl { margin: 0; display: grid; gap: 8px; }
dt { color: var(--muted); font-size: .86rem; font-weight: 850; }
dd { margin: 0 0 6px; }
dd code, .preview-row code {
  display: block;
  border: 1px solid rgba(24,78,58,.14);
  background: rgba(255,255,255,.72);
  border-radius: 14px;
  padding: 12px;
  color: var(--forest-dark);
}
.hero-actions, .actions, .quick-fill {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.primary-link, .primary-btn, .soft-btn, .secondary-btn, .danger-btn, .chip-btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
  font-weight: 950;
  transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease;
}
.primary-link, .primary-btn {
  background: linear-gradient(135deg, var(--forest), var(--mint));
  color: #fff;
  box-shadow: 0 14px 34px rgba(24,78,58,.22);
}
.soft-btn, .chip-btn {
  color: var(--forest);
  background: rgba(255,255,255,.68);
  border: 1px solid var(--line);
}
.secondary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--success), #73bd79);
}
.danger-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--danger), #d68262);
}
button:hover, .primary-link:hover { transform: translateY(-1px); }
button:disabled { cursor: not-allowed; opacity: .55; transform: none; }
.status-line {
  display: inline-block;
  align-self: flex-start;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.62);
  padding: 10px 13px;
  border-radius: 999px;
  color: var(--muted);
  margin: 0;
}
.status-line.ok { color: var(--success); border-color: rgba(47,143,87,.35); }
.status-line.fail { color: var(--danger); border-color: rgba(184,74,74,.35); }

.workspace { display: grid; gap: 22px; }
.control-panel, .result-card, .analysis-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,250,240,.82);
  box-shadow: var(--shadow);
  padding: clamp(20px, 3.4vw, 32px);
  backdrop-filter: blur(18px);
}
.section-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}
.compact-title { margin-bottom: 12px; }
h2 { margin: 0; color: var(--forest-dark); font-size: clamp(1.36rem, 2.4vw, 2.1rem); letter-spacing: -.04em; }
h3 { margin: 0 0 12px; color: var(--forest-dark); }
h4 { color: var(--forest); margin: 18px 0 10px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 16px; }
.input-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 16px; }
.field { display: grid; gap: 8px; color: var(--forest-dark); font-weight: 900; }
select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.76);
  color: var(--ink);
  outline: none;
  padding: 14px 16px;
}
textarea { resize: vertical; min-height: 118px; font-family: var(--mono); letter-spacing: .035em; line-height: 1.55; }
select:focus, textarea:focus { border-color: var(--line-strong); box-shadow: 0 0 0 4px rgba(197,139,44,.15); }
.input-counter {
  justify-self: end;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 900;
}
.input-counter.full { color: var(--success); }
.error-box {
  margin: 16px 0 0;
  border: 1px solid rgba(184,74,74,.25);
  background: rgba(184,74,74,.1);
  color: var(--danger);
  border-radius: 18px;
  padding: 14px 16px;
}
.result-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr); gap: 22px; }
.detected {
  display: inline-block;
  background: rgba(123,201,169,.2);
  color: var(--forest);
  border: 1px solid rgba(24,78,58,.18);
  border-radius: 999px;
  padding: 8px 12px;
  margin: 0 0 14px;
  font-weight: 900;
}
.preview-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.preview-row span { display: block; color: var(--muted); font-size: .82rem; margin-bottom: 6px; }
.result-value {
  margin: 16px 0 8px;
  padding: 22px;
  border-radius: 22px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(135deg, var(--forest-dark), #296f56);
  color: #fff9e8;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  letter-spacing: .05em;
}
.verify-box {
  margin-top: 16px;
  border: 1px dashed var(--line);
  border-radius: 18px;
  padding: 16px;
  background: rgba(255,255,255,.55);
  color: var(--muted);
  line-height: 1.6;
}
.verify-box.ok { color: var(--success); border-color: rgba(47,143,87,.36); }
.verify-box.fail { color: var(--danger); border-color: rgba(184,74,74,.36); }
.step-box {
  background: rgba(255,255,255,.55);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  margin-top: 16px;
}
.accent-box { background: linear-gradient(180deg, rgba(255,247,229,.92), rgba(255,255,255,.58)); border-color: var(--line-strong); }
.step-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.step-head code { color: var(--forest); font-weight: 900; }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.mt { margin-top: 16px; }
.bit-grid {
  display: grid;
  grid-template-columns: repeat(16, minmax(30px, 1fr));
  gap: 6px;
  margin-top: 12px;
}
.bit-grid.compact { grid-template-columns: repeat(8, minmax(30px, 1fr)); }
.bit, .mini-bit {
  position: relative;
  min-height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255,255,255,.72);
  color: var(--forest-dark);
  font: 900 .92rem var(--mono);
}
.bit.group-end, .mini-bit.group-end { border-color: var(--line-strong); background: rgba(255,246,225,.86); }
.bit::after {
  content: attr(data-index);
  position: absolute;
  top: 2px;
  right: 4px;
  font: 700 .52rem var(--sans);
  color: rgba(22,35,27,.33);
}
.inline-bits { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 12px; }
.mini-bit { width: 24px; min-height: 24px; font-size: .72rem; border-radius: 8px; }
.table-wrap { overflow-x: auto; border-radius: 18px; border: 1px solid var(--line); margin-top: 18px; }
table { width: 100%; border-collapse: collapse; min-width: 980px; background: rgba(255,255,255,.46); }
th, td { padding: 13px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--forest); background: rgba(123,201,169,.18); font-size: .85rem; }
td { color: var(--ink); font-family: var(--mono); font-size: .87rem; word-break: break-all; }
.pill { display: inline-block; padding: 5px 9px; border-radius: 999px; background: rgba(197,139,44,.15); border: 1px solid rgba(197,139,44,.3); color: var(--forest); font-family: var(--sans); font-weight: 950; }
.rounds { display: grid; gap: 14px; margin-top: 18px; }
.round-card { border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.5); overflow: hidden; }
.round-header {
  width: 100%;
  display: grid;
  grid-template-columns: 120px minmax(180px, .9fr) minmax(250px, 1.25fr);
  gap: 14px;
  align-items: center;
  text-align: left;
  border-radius: 0;
  color: var(--ink);
  background: rgba(255,247,229,.8);
}
.round-header:hover { transform: none; background: rgba(123,201,169,.18); }
.round-no { color: var(--gold); font-weight: 950; }
.round-header em { color: var(--muted); font-style: normal; font-family: var(--mono); margin-left: 6px; }
.round-state { color: var(--muted); font-family: var(--mono); font-size: .84rem; }
.round-body { display: none; padding: 18px; }
.round-card.open .round-body { display: block; }
.formula-box {
  border: 1px solid rgba(197,139,44,.32);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255,247,229,.72);
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.6;
}
.formula-box b { color: var(--forest); }
.round-summary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.kv { border: 1px solid var(--line); border-radius: 16px; padding: 12px; background: rgba(255,255,255,.55); }
.kv span { color: var(--forest); display: block; margin-bottom: 6px; font-size: .84rem; font-weight: 950; }
.sbox-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
.sbox-card { border: 1px solid var(--line); border-radius: 16px; padding: 12px; background: rgba(255,255,255,.55); font-family: var(--mono); font-size: .83rem; line-height: 1.55; }
.sbox-title { color: var(--gold); font: 950 1rem var(--sans); margin-bottom: 8px; }
.sbox-row { display: flex; justify-content: space-between; gap: 10px; border-top: 1px solid rgba(24,78,58,.09); padding-top: 7px; margin-top: 7px; }
.sbox-row span { color: var(--muted); font-family: var(--sans); }
.sbox-row code { text-align: right; color: var(--forest-dark); }
.footer { max-width: 1480px; margin: 0 auto; padding: 0 28px 28px; color: var(--muted); text-align: center; }

@media (max-width: 1180px) {
  .app-shell { grid-template-columns: 1fr; }
  .side-hero { position: relative; top: 0; min-height: auto; }
}
@media (max-width: 860px) {
  .result-grid, .input-columns, .two-col, .form-grid, .preview-row { grid-template-columns: 1fr; }
  .round-header { grid-template-columns: 1fr; }
  .sbox-grid, .round-summary { grid-template-columns: 1fr; }
  .section-title { flex-direction: column; }
  .bit-grid { grid-template-columns: repeat(8, minmax(28px, 1fr)); }
}
@media (max-width: 580px) {
  .app-shell { padding: 14px; }
  .side-hero, .control-panel, .result-card, .analysis-panel { border-radius: 22px; }
  .actions button, .quick-fill button, .hero-actions a, .hero-actions button { width: 100%; text-align: center; }
  .bit-grid, .bit-grid.compact { grid-template-columns: repeat(4, minmax(28px, 1fr)); }
}