/* Lusk Designs — one metaphor: the drafting table. Paper, blueprint ink, one hi-vis accent. */
:root {
  --paper: #f3efe6;
  --paper-2: #ebe5d8;
  --ink: #10233a;
  --ink-2: #5b6675;          /* secondary text on paper: 5.08:1 */
  --rule: rgb(16 35 58 / .14);
  --bp: #0e2c4f;             /* blueprint panels */
  --bp-ink: #f3efe6;         /* 12.27:1 on --bp */
  --bp-ink-2: #9fb3c8;       /* 6.54:1 on --bp */
  --bp-rule: rgb(159 179 200 / .18);
  --accent: #ff7a1a;         /* hi-vis. Only ever a fill behind --ink (6.08:1) */
  --accent-ink: #c2410c;     /* same hue, for text on paper (4.51:1) */
  --focus: #ff7a1a;
  --error: #b42318;

  --font: "Bricolage Grotesque", ui-sans-serif, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  /* type scale: 13/15/17/21/28 body tiers, 44–112 display */
  --t-meta: 13px;
  --t-small: 15px;
  --t-body: 17px;
  --t-lead: clamp(19px, 1.2vw + 14px, 22px);
  --t-h3: clamp(21px, 1vw + 16px, 26px);
  --t-h2: clamp(34px, 3.4vw + 18px, 60px);
  --t-h1: clamp(46px, 7.2vw + 16px, 118px);

  --gutter: clamp(16px, 5vw, 72px);
  --max: 1240px;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-move: cubic-bezier(0.77, 0, 0.175, 1);
  --t-press: 160ms;
  --t-ui: 220ms;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; } /* any display rule would otherwise beat the attribute */
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 var(--t-body)/1.55 var(--font);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, p, ol, ul, dl, dd, figure { margin: 0; }
ol, ul { padding: 0; list-style: none; }
a { color: inherit; }
img, svg, canvas { display: block; max-width: 100%; }
::selection { background: var(--accent); color: var(--ink); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--mono); font-size: var(--t-meta); letter-spacing: 0; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink); color: var(--paper); padding: 10px 14px; }
.skip:focus { left: 8px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 48px; padding: 0 22px;
  font: 700 var(--t-small)/1 var(--font); text-decoration: none;
  border: 0; border-radius: 2px; cursor: pointer;
  transition: transform var(--t-press) var(--ease-out), background-color var(--t-ui) var(--ease-out);
}
.btn:active { transform: scale(.97); }
.btn-go { background: var(--accent); color: var(--ink); }
.btn-go:hover { background: #ff8b38; }
.btn-go .arrow { transition: transform var(--t-ui) var(--ease-out); }
.btn-go:hover .arrow { transform: translateX(3px); }
.btn-line { background: transparent; color: inherit; box-shadow: inset 0 0 0 1.5px currentColor; }
.btn-line:hover { background: rgb(255 255 255 / .06); }
.btn[disabled] { opacity: .55; cursor: progress; }

/* ---------- header ---------- */
.top {
  position: sticky; top: 0; z-index: 50;
  background: var(--bp); color: var(--bp-ink);
  border-bottom: 1px solid var(--bp-rule);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: -.01em; }
.brand svg { width: 24px; height: 24px; }
.brand span { font-weight: 400; color: var(--bp-ink-2); }
.nav { display: flex; align-items: center; gap: clamp(12px, 2.4vw, 32px); }
.nav a:not(.btn) { text-decoration: none; font-size: var(--t-small); color: var(--bp-ink-2); transition: color var(--t-ui) var(--ease-out); }
.nav a:not(.btn):hover { color: var(--bp-ink); }
.nav .btn { min-height: 40px; padding: 0 16px; }
@media (max-width: 760px) { .nav a:not(.btn) { display: none; } }

/* ---------- hero: the drafting table ---------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  background: var(--bp); color: var(--bp-ink);
  /* the sheet: 24px minor grid, 120px major grid */
  background-image:
    linear-gradient(var(--bp-rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--bp-rule) 1px, transparent 1px),
    linear-gradient(rgb(159 179 200 / .07) 1px, transparent 1px),
    linear-gradient(90deg, rgb(159 179 200 / .07) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  background-position: -1px -1px;
}
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; }
.hero .wrap { min-height: min(760px, calc(100dvh - 64px)); display: grid; align-content: center; padding-top: 72px; padding-bottom: 96px; }
.hero h1 {
  font-size: var(--t-h1); line-height: .9; font-weight: 700; letter-spacing: -.035em;
  max-width: 11ch; text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lead { margin-top: 28px; max-width: 40ch; font-size: var(--t-lead); line-height: 1.45; color: var(--bp-ink-2); }
.hero .actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; }
.hero .actions a.mail { font-family: var(--mono); font-size: var(--t-small); color: var(--bp-ink); text-underline-offset: 4px; text-decoration-color: var(--bp-ink-2); }
/* title block, bottom-right, like a drawing sheet */
.titleblock {
  position: absolute; right: var(--gutter); bottom: 24px;
  display: grid; grid-template-columns: auto auto; gap: 2px 16px;
  font-family: var(--mono); font-size: 11px; line-height: 1.5; color: var(--bp-ink-2);
  border: 1px solid var(--bp-rule); padding: 10px 12px; background: rgb(14 44 79 / .7);
}
.titleblock b { color: var(--bp-ink); font-weight: 400; }
@media (max-width: 760px) { .titleblock { display: none; } }

/* ---------- sections ---------- */
section { padding: clamp(72px, 10vw, 144px) 0; }
.label { display: flex; gap: 12px; align-items: baseline; font-family: var(--mono); font-size: var(--t-meta); color: var(--ink-2); margin-bottom: 20px; }
.label::after { content: ""; flex: 1; height: 1px; background: var(--rule); transform: translateY(-4px); }
h2 { font-size: var(--t-h2); line-height: 1; letter-spacing: -.03em; font-weight: 700; max-width: 18ch; text-wrap: balance; }
.intro { margin-top: 20px; max-width: 52ch; font-size: var(--t-lead); line-height: 1.5; color: var(--ink-2); }

/* ---------- the math ---------- */
.math-grid { margin-top: clamp(40px, 5vw, 64px); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 96px); align-items: end; }
@media (max-width: 860px) { .math-grid { grid-template-columns: 1fr; } }
.field-range { display: grid; gap: 10px; padding: 20px 0; border-top: 1px solid var(--rule); }
.field-range:last-child { border-bottom: 1px solid var(--rule); }
.field-range label { display: flex; justify-content: space-between; gap: 16px; font-size: var(--t-small); }
.field-range output { font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: var(--t-body); }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 32px; background: transparent; cursor: pointer; }
input[type=range]::-webkit-slider-runnable-track { height: 2px; background: linear-gradient(90deg, var(--ink) var(--fill, 50%), var(--rule) var(--fill, 50%)); }
input[type=range]::-moz-range-track { height: 2px; background: var(--rule); }
input[type=range]::-moz-range-progress { height: 2px; background: var(--ink); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; margin-top: -10px; border-radius: 50%; background: var(--paper); border: 2px solid var(--ink); transition: transform var(--t-press) var(--ease-out); }
input[type=range]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--paper); border: 2px solid var(--ink); }
input[type=range]:active::-webkit-slider-thumb { transform: scale(1.12); }
.result .big {
  display: block; font-size: clamp(64px, 11vw, 168px); line-height: .85; font-weight: 700; letter-spacing: -.045em;
  font-variant-numeric: tabular-nums;
}
.result .per { font-family: var(--mono); font-size: var(--t-small); color: var(--ink-2); }
.result p { margin-top: 20px; max-width: 42ch; color: var(--ink-2); }
.result p strong { color: var(--ink); font-weight: 700; }

/* ---------- spec sheet ---------- */
.spec { background: var(--paper-2); }
.spec-list { margin-top: clamp(40px, 5vw, 64px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1.5px solid var(--ink); }
.spec-list li { display: grid; grid-template-columns: 56px 1fr; gap: 8px 16px; padding: 28px 24px 32px 0; border-bottom: 1px solid var(--rule); }
.spec-list li:nth-child(odd) { border-right: 1px solid var(--rule); }
.spec-list li:nth-child(even) { padding-left: 24px; }
.spec-list .n { font-family: var(--mono); font-size: var(--t-meta); color: var(--accent-ink); padding-top: 6px; }
.spec-list h3 { font-size: var(--t-h3); line-height: 1.15; letter-spacing: -.015em; font-weight: 700; }
.spec-list p { grid-column: 2; color: var(--ink-2); max-width: 44ch; }
@media (max-width: 760px) {
  .spec-list { grid-template-columns: 1fr; }
  .spec-list li, .spec-list li:nth-child(even) { padding: 24px 0 28px; border-right: 0; }
  .spec-list li { grid-template-columns: 44px 1fr; }
}

/* ---------- process ---------- */
.steps { margin-top: clamp(40px, 5vw, 64px); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; counter-reset: step; }
.steps li { position: relative; padding: 28px 28px 0 0; border-top: 1.5px solid var(--ink); }
.steps li + li { padding-left: 28px; border-left: 1px solid var(--rule); }
.steps .n { font-family: var(--mono); font-size: var(--t-meta); color: var(--ink-2); }
.steps h3 { margin-top: 28px; font-size: clamp(28px, 2.4vw + 12px, 44px); line-height: 1; letter-spacing: -.03em; font-weight: 700; }
.steps p { margin-top: 14px; color: var(--ink-2); max-width: 32ch; }
@media (max-width: 760px) {
  .steps { grid-template-columns: 1fr; gap: 36px; }
  .steps li + li { padding-left: 0; border-left: 0; }
}
.care { margin-top: 56px; padding-top: 24px; border-top: 1px dashed var(--rule); display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: baseline; color: var(--ink-2); }
.care strong { color: var(--ink); }

/* ---------- start a project ---------- */
.start { background: var(--bp); color: var(--bp-ink); }
.start .label { color: var(--bp-ink-2); }
.start .label::after { background: var(--bp-rule); }
.start .intro { color: var(--bp-ink-2); }
.start-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: clamp(40px, 6vw, 96px); }
@media (max-width: 900px) { .start-grid { grid-template-columns: 1fr; } }
.start .aside { margin-top: 40px; display: grid; gap: 6px; font-size: var(--t-small); color: var(--bp-ink-2); }
.start .aside a { color: var(--bp-ink); font-family: var(--mono); }

form.lead { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 20px; align-content: start; }
.f { display: grid; gap: 8px; }
.f.full { grid-column: 1 / -1; }
@media (max-width: 600px) { form.lead { grid-template-columns: 1fr; } }
.f > label, .f legend { font-size: var(--t-small); color: var(--bp-ink); padding: 0; }
.f .opt { color: var(--bp-ink-2); font-size: var(--t-meta); font-family: var(--mono); margin-left: 6px; }
.f input[type=text], .f input[type=email], .f input[type=tel], .f input[type=url], .f select, .f textarea {
  width: 100%; min-height: 48px; padding: 12px 14px;
  font: 400 16px/1.4 var(--font); color: var(--bp-ink);
  background: rgb(243 239 230 / .04); border: 1px solid rgb(159 179 200 / .38); border-radius: 2px;
  transition: border-color var(--t-ui) var(--ease-out), background-color var(--t-ui) var(--ease-out);
}
.f select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--bp-ink-2) 50%), linear-gradient(135deg, var(--bp-ink-2) 50%, transparent 50%); background-position: calc(100% - 20px) 21px, calc(100% - 15px) 21px; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 40px; }
.f select option { color: var(--ink); background: var(--paper); }
.f textarea { min-height: 132px; resize: vertical; }
.f input:hover, .f select:hover, .f textarea:hover { border-color: rgb(159 179 200 / .6); }
.f input:focus, .f select:focus, .f textarea:focus { outline: none; border-color: var(--accent); background: rgb(243 239 230 / .07); }
.f [aria-invalid=true] { border-color: #ff8a80; }
.f .err { color: #ffb4ab; font-size: var(--t-meta); min-height: 0; }
.f .err:empty { display: none; }
fieldset.f { border: 0; margin: 0; padding: 0; min-width: 0; }
.checks { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.checks label { position: relative; cursor: pointer; }
.checks input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.checks span {
  display: inline-flex; align-items: center; min-height: 40px; padding: 0 14px;
  border: 1px solid rgb(159 179 200 / .38); border-radius: 2px; font-size: var(--t-small); color: var(--bp-ink-2);
  transition: background-color var(--t-ui) var(--ease-out), color var(--t-ui) var(--ease-out), border-color var(--t-ui) var(--ease-out);
}
.checks input:checked + span { background: var(--bp-ink); color: var(--ink); border-color: var(--bp-ink); }
.checks input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: 2px; }
.hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.submit-row { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-top: 8px; }
.submit-row .note { font-size: var(--t-meta); color: var(--bp-ink-2); }
.status { grid-column: 1 / -1; font-size: var(--t-small); }
.status:empty { display: none; }
.status.bad { color: #ffb4ab; }
.done { grid-column: 1 / -1; padding: 32px; border: 1px solid var(--bp-rule); }
.done h3 { font-size: var(--t-h3); letter-spacing: -.015em; }
.done p { margin-top: 10px; color: var(--bp-ink-2); }

/* ---------- footer ---------- */
footer { background: var(--bp); color: var(--bp-ink-2); border-top: 1px solid var(--bp-rule); font-size: var(--t-small); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; padding-top: 28px; padding-bottom: calc(28px + env(safe-area-inset-bottom)); }
footer a { color: var(--bp-ink); text-decoration: none; }
footer a:hover { text-decoration: underline; text-underline-offset: 4px; }
footer .links { display: flex; gap: 24px; }

/* ---------- reveal (progressive; content is visible without JS) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 560ms var(--ease-out), transform 560ms var(--ease-out); }
  .js .reveal.in { opacity: 1; transform: none; }
}

/* ---------- plain pages (privacy, 404) ---------- */
.page { padding: clamp(56px, 8vw, 112px) 0; }
.page h1 { font-size: var(--t-h2); line-height: 1; letter-spacing: -.03em; }
.page .prose { margin-top: 32px; max-width: 64ch; display: grid; gap: 16px; }
.page .prose h2 { font-size: var(--t-h3); margin-top: 16px; }
.page .prose ul { list-style: disc; padding-left: 20px; display: grid; gap: 6px; }
.page .meta { margin-top: 12px; font-family: var(--mono); font-size: var(--t-meta); color: var(--ink-2); }

/* 404 */
.hero .nf { margin-top: 16px; }
.hero .mono { color: var(--bp-ink-2); }