:root {
  color-scheme: light;
  --ink: #101928;
  --ink-2: #24324a;
  --muted: #687488;
  --line: #dbe1e8;
  --soft: #f3f6f8;
  --paper: #fbfcfd;
  --white: #ffffff;
  --mint: #36d1a0;
  --mint-dark: #087f62;
  --amber: #f3b44d;
  --coral: #ef6f61;
  --blue: #2f6fed;
  --shadow: 0 18px 50px rgba(16, 25, 40, .08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--soft); font-size: 16px; line-height: 1.55; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.shell { width: min(1480px, calc(100% - 40px)); margin: 0 auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.topbar { position: sticky; top: 0; z-index: 20; min-height: 68px; padding: 12px 24px; display: flex; align-items: center; justify-content: space-between; gap: 18px; background: rgba(16, 25, 40, .96); color: white; backdrop-filter: blur(14px); }
.brand { display: flex; align-items: center; gap: 12px; color: white; text-decoration: none; font-weight: 800; letter-spacing: -.02em; font-size: 1.12rem; }
.brand-mark { display: flex; align-items: flex-end; gap: 3px; height: 24px; }
.brand-mark i { width: 5px; border-radius: 3px; background: var(--mint); display: block; }
.brand-mark i:nth-child(1) { height: 10px; opacity: .65; }
.brand-mark i:nth-child(2) { height: 17px; opacity: .82; }
.brand-mark i:nth-child(3) { height: 24px; }
.top-actions { display: flex; align-items: center; gap: 10px; }
.validation-badge { font-size: .78rem; font-weight: 750; color: #bed1ca; margin-right: 6px; }
.button { min-height: 42px; border: 1px solid transparent; border-radius: 10px; padding: 9px 15px; font-weight: 750; color: var(--ink); background: white; transition: transform .15s ease, background .15s ease, border .15s ease; }
.button:hover { transform: translateY(-1px); }
.button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, .step:focus-visible { outline: 3px solid rgba(47, 111, 237, .28); outline-offset: 2px; }
.button.outline { border-color: #607089; background: transparent; color: inherit; }
.topbar .button.outline { border-color: #66758b; color: white; }
.button.quiet { background: #28364b; color: white; }
.button.primary { background: var(--ink); color: white; }
.button.danger { background: transparent; color: #a73f34; border: 1px solid #e7b8b3; }

.intro { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: 60px; padding: 68px 0 44px; align-items: end; }
.eyebrow, .section-kicker { margin: 0 0 10px; color: var(--mint-dark); text-transform: uppercase; font-size: .78rem; letter-spacing: .13em; font-weight: 850; }
h1 { max-width: 880px; margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.5rem, 5vw, 5rem); line-height: .98; letter-spacing: -.055em; font-weight: 600; }
.intro-copy { margin: 0; color: var(--ink-2); font-size: 1.06rem; max-width: 560px; }

.workspace { display: grid; grid-template-columns: 215px minmax(0, 1fr); align-items: start; gap: 24px; padding-bottom: 60px; }
.steps { position: sticky; top: 92px; display: flex; flex-direction: column; gap: 8px; }
.step { display: flex; align-items: center; gap: 12px; width: 100%; border: 0; border-radius: 12px; background: transparent; color: var(--muted); padding: 13px 14px; text-align: left; font-weight: 750; }
.step span { color: #97a2b1; font-size: .72rem; letter-spacing: .08em; }
.step.active, .step:hover { color: var(--ink); background: white; box-shadow: 0 5px 20px rgba(16, 25, 40, .06); }
.step.active span { color: var(--mint-dark); }
.content { min-width: 0; display: grid; gap: 22px; }
.panel { scroll-margin-top: 92px; background: var(--white); border: 1px solid #e0e5eb; border-radius: 20px; padding: clamp(22px, 3vw, 38px); box-shadow: var(--shadow); }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.panel-heading h2 { margin: 0; font-size: clamp(1.45rem, 2vw, 2rem); letter-spacing: -.035em; line-height: 1.15; }
.panel-heading p:not(.section-kicker) { max-width: 720px; color: var(--muted); margin: 9px 0 0; }
.status-dot { display: flex; gap: 8px; align-items: center; color: var(--muted); white-space: nowrap; font-size: .85rem; font-weight: 700; }
.status-dot i { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }

.field-grid { display: grid; gap: 20px; }
.field-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field.full { grid-column: 1 / -1; }
.field { display: grid; gap: 8px; align-content: start; }
.field > span, legend { color: var(--ink-2); font-weight: 800; font-size: .9rem; }
.field small { color: var(--muted); font-size: .78rem; }
input, select, textarea { width: 100%; border: 1px solid #cdd5df; border-radius: 10px; color: var(--ink); background: white; padding: 12px 13px; }
textarea { min-height: 96px; resize: vertical; }
input::placeholder, textarea::placeholder { color: #8a96a7; }
.goal-block { margin: 22px 0; padding: 20px; background: var(--soft); border-radius: 14px; }
fieldset { margin: 0; padding: 0; border: 0; }
legend { margin-bottom: 12px; }
.choice-row { display: flex; flex-wrap: wrap; gap: 9px; }
.choice-row label input { position: absolute; opacity: 0; pointer-events: none; }
.choice-row label span { display: inline-flex; border: 1px solid #ccd5df; border-radius: 999px; padding: 8px 13px; background: white; color: var(--ink-2); font-size: .87rem; font-weight: 700; cursor: pointer; }
.choice-row label input:checked + span { background: var(--ink); border-color: var(--ink); color: white; }
.choice-row label input:focus-visible + span { outline: 3px solid rgba(47, 111, 237, .28); outline-offset: 2px; }

.table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; min-width: 1560px; }
th { padding: 12px 10px; background: var(--soft); color: #586579; font-size: .72rem; line-height: 1.25; text-align: left; text-transform: uppercase; letter-spacing: .055em; }
td { padding: 9px; border-top: 1px solid var(--line); vertical-align: middle; }
td input, td select { min-width: 105px; padding: 9px 10px; border-radius: 8px; }
td:first-child select { min-width: 150px; font-weight: 750; }
.economics-list { display: grid; gap: 18px; }
.economics-card { border: 1px solid var(--line); border-radius: 16px; padding: 20px; background: var(--paper); }
.economics-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 6px; }
.econ-marketplace { display: block; font-size: 1.15rem; font-weight: 850; letter-spacing: -.02em; }
.econ-segment { display: block; color: var(--muted); font-size: .84rem; margin-top: 2px; }
.rule-state { flex: 0 0 auto; padding: 5px 9px; border-radius: 999px; background: #fff2d8; color: #7a5410; font-size: .72rem; font-weight: 800; }
.rule-state.complete { background: #e5f7f1; color: var(--mint-dark); }
.platform-prompt { margin: 0 0 16px; color: #47556a; font-size: .86rem; }
.econ-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; margin-top: 12px; }
.econ-grid.costs { grid-template-columns: repeat(6,minmax(0,1fr)); padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.econ-grid.labor { padding: 14px 0; border-bottom: 1px solid var(--line); }
.econ-grid.provenance { grid-template-columns: 180px minmax(220px,1fr) minmax(190px,1fr); }
.econ-grid label { display: grid; gap: 5px; color: var(--muted); font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .035em; }
.econ-grid input,.econ-grid select,.econ-grid textarea { text-transform: none; letter-spacing: 0; font-size: .9rem; }
.econ-grid textarea { min-height: 76px; }
.econ-grid .wide { grid-column: 1/-1; }
.concentration-guardrail { margin-top: 20px; }
.allocation-pair { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); }
.fit-note { margin-top: 20px; padding: 15px 17px; border-radius: 12px; background: #edf3ff; color: #334e7d; font-size: .86rem; }
.remove-row { width: 34px; height: 34px; border: 0; border-radius: 8px; background: transparent; color: #a3493f; font-size: 1.2rem; }
.remove-row:hover { background: #fff0ee; }
.readiness { margin: 22px 0 0; padding: 17px 18px; background: #f6f8fa; border-radius: 13px; }
.readiness-head { display: flex; justify-content: space-between; gap: 16px; font-weight: 800; }
.readiness-head strong { color: var(--mint-dark); }
.meter { height: 7px; overflow: hidden; border-radius: 10px; background: #dfe5eb; margin: 10px 0; }
.meter i { display: block; width: 12%; height: 100%; background: linear-gradient(90deg, var(--amber), var(--mint)); transition: width .25s ease; }
.readiness p { margin: 0; color: var(--muted); font-size: .85rem; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 22px; }
.metric-card { position: relative; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; padding: 17px; min-height: 150px; }
.metric-card::after { content: ""; position: absolute; right: -28px; bottom: -28px; width: 80px; height: 80px; background: var(--accent, var(--mint)); opacity: .12; border-radius: 50%; }
.metric-card .channel-name { display: block; font-weight: 850; }
.metric-card .metric-label { display: block; color: var(--muted); font-size: .77rem; margin-top: 15px; }
.metric-card strong { display: block; font-size: 1.55rem; line-height: 1.2; letter-spacing: -.03em; }
.metric-card .meta { display: block; color: var(--muted); font-size: .76rem; margin-top: 8px; }
.guardrail { display: grid; grid-template-columns: 30px 1fr; gap: 10px; margin-top: 20px; padding: 15px 17px; border-left: 3px solid var(--amber); background: #fff9ef; color: #5a4a2c; }
.guardrail > span { display: grid; place-items: center; width: 23px; height: 23px; border-radius: 50%; background: var(--amber); color: var(--ink); font-weight: 900; }
.guardrail p { margin: 0; font-size: .84rem; }

.decision-list { display: grid; gap: 14px; }
.decision-card { border: 1px solid var(--line); border-radius: 15px; padding: 18px; background: var(--paper); }
.decision-top { display: grid; grid-template-columns: 52px 150px minmax(220px, 1fr) 150px 36px; gap: 12px; align-items: end; }
.decision-number { width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; background: var(--ink); color: white; font-weight: 850; }
.decision-top label, .decision-detail label { display: grid; gap: 5px; color: var(--muted); font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
.decision-top input, .decision-top select, .decision-detail textarea { text-transform: none; letter-spacing: 0; font-size: .92rem; }
.decision-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0 0 64px; }
.decision-detail textarea { min-height: 76px; }
.experiment-grid textarea { min-height: 88px; }

.check-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.check-item { display: flex; align-items: flex-start; gap: 10px; border: 1px solid var(--line); border-radius: 13px; padding: 14px; color: var(--muted); }
.check-item i { flex: 0 0 auto; width: 20px; height: 20px; border: 2px solid #aeb8c5; border-radius: 50%; margin-top: 1px; }
.check-item.done { color: var(--ink); background: #f2fbf8; border-color: #bfe6d9; }
.check-item.done i { border-color: var(--mint-dark); background: var(--mint-dark); box-shadow: inset 0 0 0 4px #f2fbf8; }
.summary-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.privacy-note { margin: 18px 0 0; color: var(--muted); font-size: .8rem; }

footer { border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: .82rem; }
.toast { position: fixed; right: 22px; bottom: 22px; max-width: 360px; padding: 13px 16px; border-radius: 10px; background: var(--ink); color: white; box-shadow: var(--shadow); opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s ease; font-weight: 700; font-size: .88rem; }
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 1050px) {
  .workspace { grid-template-columns: 1fr; }
  .steps { position: sticky; top: 68px; z-index: 12; flex-direction: row; overflow-x: auto; padding: 8px; background: rgba(243, 246, 248, .94); backdrop-filter: blur(10px); }
  .step { white-space: nowrap; width: auto; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .econ-grid,.econ-grid.costs { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .econ-grid.provenance { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 24px, 1480px); }
  .topbar { padding: 12px; }
  .validation-badge, .topbar .button.quiet { display: none; }
  .intro { grid-template-columns: 1fr; gap: 22px; padding-top: 42px; }
  h1 { font-size: clamp(2.35rem, 12vw, 4rem); }
  .panel { padding: 21px 17px; border-radius: 15px; }
  .panel-heading { flex-direction: column; }
  .channel-heading .button { width: 100%; }
  .field-grid.two, .decision-detail, .check-grid, .allocation-pair, .econ-grid, .econ-grid.costs, .econ-grid.provenance { grid-template-columns: 1fr; }
  .decision-detail { margin-left: 0; }
  .decision-top { grid-template-columns: 42px 1fr 36px; }
  .decision-top label:nth-of-type(1) { grid-column: 2; }
  .decision-top label:nth-of-type(2), .decision-top label:nth-of-type(3) { grid-column: 1 / -1; }
  .metric-grid { grid-template-columns: 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; }
}

@media print {
  body { background: white; }
  .topbar, .steps, #addChannel, #addDecision, .remove-row, .summary-actions, .toast { display: none !important; }
  .shell { width: 100%; }
  .intro { padding: 24px 0; grid-template-columns: 1fr; gap: 12px; }
  h1 { font-size: 2.4rem; }
  .workspace { display: block; }
  .panel { box-shadow: none; break-inside: avoid; margin-bottom: 16px; border-color: #bfc6cf; }
  input, select, textarea { border-color: #ccd2d9; }
}