:root {
  --ink: var(--tools-text);
  --muted: var(--tools-muted);
  --paper: var(--tools-bg);
  --surface: var(--tools-surface);
  --surface-soft: var(--tools-surface-soft);
  --line: var(--tools-line);
  --green: var(--tools-green);
  --green-dark: var(--tools-green-strong);
  --green-soft: var(--tools-green-soft);
  --red: var(--tools-red);
  color: var(--ink);
  background: var(--paper);
  font-family: var(--tools-sans);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 14% 12%, color-mix(in srgb, var(--green) 8%, transparent), transparent 28rem),
    var(--paper);
}
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .42; }
a { color: inherit; }
[v-cloak] { display: none; }
svg { flex: 0 0 auto; }
.visually-hidden {
  position: fixed;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: .95rem;
  font-weight: 750;
  letter-spacing: -.02em;
  text-decoration: none;
}

main {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
}
.hero {
  max-width: 850px;
  margin: 42px auto 54px;
  text-align: center;
}
.eyebrow, .step-label {
  margin: 0 0 12px;
  color: var(--green-dark);
  font: 700 .72rem/1.3 var(--tools-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0 auto;
  font-family: var(--tools-serif);
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 500;
  line-height: .96;
  letter-spacing: -.058em;
}
.hero-copy {
  max-width: 700px;
  margin: 26px auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.14rem);
  line-height: 1.7;
}
.hero-proof {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px 20px;
  margin: 22px 0 0;
  padding: 0;
  color: var(--green-dark);
  font-size: .77rem;
  font-weight: 750;
  list-style: none;
}
.hero-proof li { display: inline-flex; align-items: center; gap: 6px; }
.hero-proof svg { width: 14px; height: 14px; }

.workspace {
  margin-bottom: 54px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow: var(--tools-shadow);
}
.instant-section, .configuration-section, .results-section {
  padding: clamp(28px, 5vw, 46px);
}
.configuration-section, .results-section { border-top: 1px solid var(--line); }
.workspace h2, .workspace h3 {
  margin: 0;
  font-family: var(--tools-serif);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -.04em;
}
.workspace h2 { font-size: clamp(2rem, 4vw, 2.85rem); }
.workspace h3 { font-size: clamp(1.45rem, 3vw, 2rem); }
.section-heading > p:not(.step-label) {
  max-width: 760px;
  margin: 11px 0 0;
  color: var(--muted);
  line-height: 1.65;
}
.intro-heading { max-width: 800px; }

.instant-form { margin-top: 26px; }
.instant-form > label, .zone-form > label, .reference-field > label {
  display: block;
  margin-bottom: 9px;
  font-size: .78rem;
  font-weight: 800;
}
.instant-entry, .zone-entry {
  min-height: 66px;
  padding: 8px 9px 8px 14px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface-soft);
}
.instant-entry.invalid, .zone-entry.invalid { border-color: var(--red); }
.instant-entry > svg, .zone-entry > svg { width: 20px; height: 20px; color: var(--green-dark); }
.instant-entry input, .zone-entry input {
  min-width: 0;
  width: 100%;
  height: 46px;
  padding: 0 4px;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
}
.instant-entry input { font: 700 clamp(.78rem, 2vw, .98rem)/1.3 var(--tools-mono); }
.zone-entry input { font-size: .86rem; font-weight: 700; }
.primary-button, .secondary-button, .step-controls button, .suggestions button, .zone-actions button {
  min-height: 44px;
  border-radius: 10px;
  font-weight: 800;
}
.primary-button {
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid var(--tools-action);
  color: var(--tools-on-action);
  background: var(--tools-action);
}
.primary-button:hover { background: var(--tools-action-hover); }
.primary-button svg, .secondary-button svg { width: 18px; height: 18px; }
.zone-entry .primary-button, .secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.secondary-button {
  padding: 0 14px;
  border: 1px solid var(--line);
  color: var(--green-dark);
  background: var(--surface);
}
.secondary-button:hover, .step-controls button:hover, .suggestions button:hover, .zone-actions button:hover:not(:disabled) {
  border-color: var(--green);
  background: var(--green-soft);
}
.field-error, .field-hint, .snapshot-note, .no-suggestions {
  margin: 8px 0 0;
  font-size: .72rem;
  line-height: 1.5;
}
.field-error { color: var(--red); }
.field-hint, .snapshot-note, .no-suggestions { color: var(--muted); }

.instant-summary {
  margin-top: 16px;
  display: flex;
  align-items: stretch;
  gap: 10px;
}
.accepted-instant {
  min-width: 0;
  flex: 1 1 auto;
  padding: 11px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
}
.accepted-instant span { color: var(--muted); font-size: .7rem; font-weight: 750; }
.accepted-instant code { min-width: 0; font: 700 .78rem/1.45 var(--tools-mono); overflow-wrap: anywhere; }
.now-button { flex: 0 0 auto; }
.snapshot-note { margin-left: 2px; }
.step-controls {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.step-controls button {
  padding: 0 9px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
  font-size: .72rem;
}

.configuration-section {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(250px, .75fr);
  gap: 28px;
  background: var(--surface-soft);
}
.zone-builder, .settings-panel { min-width: 0; }
.zone-form { margin-top: 22px; }
.suggestion-block { margin-top: 16px; }
.suggestion-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.suggestions { display: flex; flex-wrap: wrap; gap: 7px; }
.suggestions button {
  max-width: 100%;
  min-height: 44px;
  padding: 0 9px 0 11px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
  font: 700 .69rem/1 var(--tools-mono);
}
.suggestions button span { min-width: 0; overflow-wrap: anywhere; }
.suggestions svg { width: 16px; height: 16px; color: var(--green-dark); }

.settings-panel {
  align-self: start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}
.settings-panel h3 { font-size: 1.35rem; }
.settings-panel fieldset { margin: 20px 0 0; padding: 0; border: 0; }
.settings-panel legend, .reference-field > label { font-size: .75rem; font-weight: 800; }
.segmented-control {
  margin-top: 9px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-soft);
}
.segmented-control label { position: relative; min-width: 0; cursor: pointer; }
.segmented-control input { position: absolute; opacity: 0; pointer-events: none; }
.segmented-control span {
  min-height: 44px;
  padding: 0 8px;
  display: grid;
  place-items: center;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: .7rem;
  font-weight: 800;
  text-align: center;
}
.segmented-control label.selected span { border-color: var(--green); color: var(--green-dark); background: var(--green-soft); }
.segmented-control input:focus-visible + span { outline: 3px solid color-mix(in srgb, var(--green) 65%, white); outline-offset: 2px; }
.reference-field { margin-top: 20px; }
.reference-field select {
  width: 100%;
  min-height: 44px;
  padding: 0 36px 0 11px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink);
  background: var(--surface-soft);
}
.reference-field p { margin: 7px 0 0; color: var(--muted); font-size: .68rem; line-height: 1.45; }

.zone-order {
  grid-column: 1 / -1;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  list-style: none;
}
.zone-order li {
  min-height: 62px;
  padding: 8px 9px 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.zone-name { min-width: 0; display: flex; align-items: center; flex-wrap: wrap; gap: 7px; }
.zone-name > span { font: 700 .78rem/1.4 var(--tools-mono); overflow-wrap: anywhere; }
.zone-name small, .reference-marker {
  padding: 4px 7px;
  border-radius: 999px;
  color: var(--green-dark);
  background: var(--green-soft);
  font-size: .6rem;
  font-weight: 800;
}
.zone-actions { flex: 0 0 auto; display: flex; gap: 5px; }
.zone-actions button {
  width: 44px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--green-dark);
  background: var(--surface);
}
.zone-actions svg { width: 18px; height: 18px; }
.zone-actions .remove-zone { color: var(--red); }

.results-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}
.reference-caption { color: var(--green-dark) !important; font-size: .72rem; font-weight: 800; }
.export-actions { flex: 0 0 auto; display: flex; gap: 8px; }
.comparison-grid {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--surface);
}
.comparison-head, .comparison-row {
  display: grid;
  grid-template-columns: minmax(150px, 1.45fr) minmax(130px, 1.15fr) minmax(100px, .85fr) minmax(105px, .82fr) minmax(118px, .9fr);
  align-items: center;
}
.comparison-head {
  min-height: 44px;
  padding: 0 14px;
  color: var(--muted);
  background: var(--surface-soft);
  font-size: .64rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.comparison-row {
  min-height: 86px;
  padding: 11px 14px;
  border-top: 1px solid var(--line);
}
.comparison-row.reference { box-shadow: inset 3px 0 0 var(--green); }
.comparison-row > div { min-width: 0; padding-right: 12px; }
.comparison-row strong, .comparison-row small { display: block; }
.comparison-row strong { font-size: .76rem; line-height: 1.4; }
.comparison-row small { margin-top: 4px; color: var(--muted); font-size: .64rem; line-height: 1.35; }
.zone-cell > strong { font: 700 .72rem/1.4 var(--tools-mono); overflow-wrap: anywhere; }
.reference-marker { display: inline-block !important; width: fit-content; margin-top: 6px !important; color: var(--green-dark) !important; }
.time-cell strong { font: 800 .9rem/1.3 var(--tools-mono); }
.offset-cell code { font: 700 .72rem/1.3 var(--tools-mono); white-space: nowrap; }
.relation {
  display: inline-block;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .63rem;
  font-weight: 800;
}
.relation.same { color: var(--green-dark); border-color: color-mix(in srgb, var(--green) 45%, var(--line)); background: var(--green-soft); }
.relation.previous, .relation.next { color: var(--ink); background: var(--surface-soft); }

.rules-note {
  padding: 18px clamp(28px, 5vw, 46px);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--green-soft) 62%, var(--surface));
}
.rules-note > svg { width: 19px; height: 19px; color: var(--green-dark); }
.rules-note p { margin: 0; color: var(--muted); font-size: .73rem; line-height: 1.55; }
.rules-note strong { margin-right: .42em; color: var(--ink); }
.toast {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: 24px;
  max-width: calc(100% - 32px);
  padding: 11px 15px;
  border-radius: 10px;
  color: white;
  background: var(--ink);
  box-shadow: var(--tools-shadow);
  transform: translateX(-50%);
  font-size: .8rem;
  font-weight: 750;
}
:focus-visible { outline: 3px solid color-mix(in srgb, var(--green) 65%, white); outline-offset: 3px; }

@media (max-width: 900px) {
  .configuration-section { grid-template-columns: 1fr; }
  .settings-panel { width: 100%; }
  .results-heading { align-items: flex-start; flex-direction: column; }
  .export-actions { width: 100%; }
  .export-actions .secondary-button { flex: 1 1 0; }
  .comparison-head, .comparison-row { grid-template-columns: minmax(140px, 1.35fr) minmax(130px, 1.15fr) minmax(95px, .8fr) minmax(105px, .8fr); }
  .comparison-head > :last-child { display: none; }
  .comparison-row > :last-child { grid-column: 1 / -1; margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--line); }
}

@media (max-width: 700px) {
  main { width: min(100% - 28px, 1040px); }
  .hero { margin: 34px auto 38px; }
  .hero h1 { font-size: clamp(2.3rem, 12vw, 3.4rem); }
  .hero-copy { font-size: .94rem; line-height: 1.55; }
  .workspace { border-radius: 18px; }
  .instant-section, .configuration-section, .results-section { padding: 26px 18px; }
  .instant-entry, .zone-entry { grid-template-columns: auto minmax(0, 1fr); padding: 9px 10px 10px; }
  .instant-entry .primary-button, .zone-entry .primary-button { grid-column: 1 / -1; width: 100%; }
  .instant-summary { align-items: stretch; flex-direction: column; }
  .accepted-instant { align-items: flex-start; flex-direction: column; gap: 4px; }
  .now-button { width: 100%; }
  .step-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .comparison-head { display: none; }
  .comparison-row {
    min-height: 0;
    padding: 15px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 15px 12px;
  }
  .comparison-row > div { padding: 0; }
  .comparison-row > div::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 5px;
    color: var(--muted);
    font-size: .58rem;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
  }
  .comparison-row > :last-child { grid-column: auto; margin: 0; padding: 0; border: 0; }
}

@media (max-width: 430px) {
  .hero-proof { align-items: flex-start; flex-direction: column; width: fit-content; margin-inline: auto; text-align: left; }
  .step-controls { grid-template-columns: 1fr; }
  .zone-order li { align-items: flex-start; flex-direction: column; }
  .zone-actions { width: 100%; }
  .zone-actions button { flex: 1 1 0; width: auto; }
  .export-actions { flex-direction: column; }
  .comparison-row { grid-template-columns: 1fr; }
  .segmented-control { grid-template-columns: 1fr; }
}

@media (prefers-color-scheme: dark) {
  body {
    background:
      radial-gradient(circle at 14% 12%, color-mix(in srgb, var(--green) 10%, transparent), transparent 28rem),
      var(--paper);
  }
  .toast { color: var(--ink); border: 1px solid var(--line); background: var(--surface); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; }
}