/* Layout: drafting-table split — the sheet (plan on white paper) beside a narrow option rail; rail drops below on phones. */
:root {
  --ground: #eef1ee;
  --panel: #ffffff;
  --paper: #ffffff;       /* the drawing sheet stays paper-white in both themes */
  --ink: #18201b;
  --muted: #5d6a62;
  --rule: #d5ddd7;
  --accent: #2e5b44;      /* Greenwood forest */
  --accent-soft: #e2ece5;
  --on-accent: #ffffff;
  --danger: #a33a2c;
  --sheet-shadow: 0 1px 2px rgba(20,40,28,.08), 0 8px 28px rgba(20,40,28,.08);
  --f-ui: "Hanken Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;
  --f-tag: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --ground: #121714; --panel: #1a211c; --ink: #e7ece8; --muted: #9aa89f; --rule: #2c3630;
  --accent: #8cc4a3; --accent-soft: #23352a; --on-accent: #0f1a14; --danger: #f08a7a;
  --sheet-shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.35); color-scheme: dark } }
:root[data-theme="dark"] {
  --ground: #121714; --panel: #1a211c; --ink: #e7ece8; --muted: #9aa89f; --rule: #2c3630;
  --accent: #8cc4a3; --accent-soft: #23352a; --on-accent: #0f1a14; --danger: #f08a7a;
  --sheet-shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.35); color-scheme: dark }

* { box-sizing: border-box }
[hidden] { display: none !important }
html { padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px) }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--f-ui); font-size: 15px; line-height: 1.45 }
img { max-width: 100% }
.wrap { max-width: 1240px; margin: 0 auto; padding-block: 20px 24px;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid; gap: 16px }

header { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 12px }
.title { display: grid; gap: 2px }
.eyebrow { font-family: var(--f-tag); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted) }
h1 { margin: 0; font-size: clamp(26px, 4vw, 34px); font-weight: 700; letter-spacing: -.01em; text-wrap: balance }

.tabs { display: flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--panel); border: 1px solid var(--rule); border-radius: 10px }
.tab { appearance: none; border: 0; background: transparent; color: var(--muted); font: 600 14px var(--f-ui); padding: 8px 14px; border-radius: 7px; cursor: pointer }
.tab:hover { color: var(--ink) }
.tab[aria-selected="true"] { background: var(--accent); color: var(--on-accent) }
@media (max-width: 520px) { .tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); width: 100% } .tab { padding: 8px 2px; font-size: 13px } }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px }
.opt input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px }

.stage { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 16px; align-items: start }
@media (max-width: 860px) { .stage { grid-template-columns: minmax(0, 1fr) } }

.sheet { background: var(--paper); border-radius: 6px; box-shadow: var(--sheet-shadow); position: relative; overflow: hidden; min-width: 0 }
.viewport { position: relative; overflow: hidden; touch-action: none; cursor: grab; padding: 3% }
.viewport.dragging { cursor: grabbing }
.viewport.still { cursor: default; touch-action: auto; padding: 4% }
.viewport.still img { width: 100%; height: auto; display: block }
.plan { position: relative; width: 100%; transform-origin: 0 0; will-change: transform }
.plan img { position: absolute; display: block; max-width: none; user-select: none; -webkit-user-drag: none; pointer-events: none }
.plan img.base { position: relative; width: 100%; height: auto }
.layer { opacity: 0; transition: opacity .22s ease }
.layer.on { opacity: 1 }
.sheet-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 8px 12px;
  border-top: 1px solid #e3e8e4; font-family: var(--f-tag); font-size: 11.5px; color: #5d6a62; background: var(--paper) }
.pick { color: #2e5b44 }
.zoom { display: flex; gap: 4px }
.ctl { appearance: none; border: 1px solid #d5ddd7; background: #fff; color: #18201b; width: 30px; height: 30px; border-radius: 6px;
  font: 600 16px var(--f-ui); cursor: pointer; display: grid; place-items: center }
.ctl:hover { border-color: #2e5b44; color: #2e5b44 }
.ctl.wide { width: auto; padding: 0 10px; font-size: 12px }

.rail { background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 16px; display: grid; gap: 18px; min-width: 0 }
.group { display: grid; gap: 8px; border: 0; margin: 0; padding: 0; min-width: 0 }
.group legend { padding: 0; margin-bottom: 8px; display: flex; justify-content: space-between; gap: 8px; width: 100%;
  font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted) }
.group legend .sheetno { font-family: var(--f-tag); font-weight: 400; letter-spacing: .04em }
.opts { display: grid; gap: 6px }
.opt { position: relative; display: block; cursor: pointer }
.opt input { position: absolute; opacity: 0; pointer-events: none }
.opt span { display: flex; align-items: center; gap: 10px; padding: 9px 11px; border: 1px solid var(--rule); border-radius: 8px; font-weight: 500; transition: border-color .15s, background .15s }
.opt span::before { content: ""; flex: none; width: 16px; height: 16px; border: 1.5px solid var(--muted); background: var(--panel) }
.opt input[type="radio"] + span::before { border-radius: 50% }
.opt input[type="checkbox"] + span::before { border-radius: 4px }
.opt:hover span { border-color: var(--accent) }
.opt input:checked + span { border-color: var(--accent); background: var(--accent-soft) }
.opt input[type="radio"]:checked + span::before { border-color: var(--accent); background: radial-gradient(circle, var(--accent) 0 4px, var(--panel) 4.5px) }
.opt input[type="checkbox"]:checked + span::before { border-color: var(--accent); background: var(--accent)
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 8.5l3 3 6-7' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/12px no-repeat }
.reset { justify-self: start; appearance: none; background: none; border: 0; padding: 0; color: var(--accent); font: 600 13px var(--f-ui); cursor: pointer; text-decoration: underline; text-underline-offset: 3px }
.note { margin: 0; font-size: 12.5px; color: var(--muted) }

.elev { display: grid; gap: 12px }
.thumbs { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px }
@media (max-width: 640px) { .thumbs { grid-template-columns: repeat(3, minmax(0, 1fr)) } }
.thumb { appearance: none; border: 1px solid var(--rule); background: var(--paper); border-radius: 6px; padding: 6px 6px 4px; cursor: pointer; display: grid; gap: 4px }
.thumb img { width: 100%; height: auto; display: block }
.thumb b { font: 500 11.5px var(--f-tag); color: #5d6a62; letter-spacing: .06em }
.thumb[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) }

.savebar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 20px;
  background: var(--panel); border: 1px solid var(--rule); border-radius: 10px; padding: 14px 16px }
.savebar-text { display: grid; gap: 2px; min-width: 0 }
.savebar-text span { color: var(--muted); font-size: 13.5px }
.savebar-actions { display: flex; gap: 8px; flex-wrap: wrap }
.btn { appearance: none; border: 1px solid var(--rule); background: var(--panel); color: var(--ink); font: 600 14px var(--f-ui);
  padding: 10px 16px; border-radius: 8px; cursor: pointer }
.btn:hover { border-color: var(--accent) }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent) }
.btn.primary:hover { filter: brightness(1.08) }
.btn[disabled] { opacity: .6; cursor: progress }

dialog { border: 0; border-radius: 12px; padding: 0; width: min(440px, calc(100vw - 32px)); background: var(--panel); color: var(--ink);
  box-shadow: 0 20px 60px rgba(0,0,0,.3) }
dialog::backdrop { background: rgba(14,22,17,.45) }
#lead-form { display: grid; gap: 14px; padding: 22px }
#lead-form h2 { margin: 0; font-size: 21px }
.lead-sub { margin: -6px 0 0; color: var(--muted); font-size: 14px }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px }
@media (max-width: 420px) { .row2 { grid-template-columns: 1fr } }
.field { display: grid; gap: 4px; font-size: 13px; font-weight: 600 }
.field input { font: 400 15px var(--f-ui); padding: 10px 11px; border: 1px solid var(--rule); border-radius: 8px; background: var(--ground); color: var(--ink); min-width: 0 }
.field input:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent) }
.field input[aria-invalid="true"] { border-color: var(--danger) }
.form-error { margin: 0; color: var(--danger); font-size: 13.5px }
.lead-actions { display: flex; justify-content: flex-end; gap: 8px }
.fine { margin: 0; font-size: 11.5px; color: var(--muted) }

@media (prefers-reduced-motion: reduce) { .layer, .opt span { transition: none } }