/* Archbotics Oy — archbotics.com
   One stylesheet, no framework, no external fonts, no third-party requests.
   Light is primary; dark follows the visitor's system setting. */

/* ---------- tokens ---------- */
:root {
  --paper: #fbfaf7;
  --surface: #f4f1ea;
  --card: #ffffff;
  --ink: #14171a;
  --ink-muted: #4a5158;
  --line: #e2ded4;
  --line-strong: #cdc7ba;
  --accent: #0f5d4e;
  --accent-strong: #0a4437;
  --accent-soft: #e6efeb;
  --on-accent: #ffffff;
  --focus: #0f5d4e;

  --radius: 14px;
  --radius-sm: 8px;
  --container: 1120px;
  --measure: 62ch;

  --step--1: clamp(0.86rem, 0.83rem + 0.15vw, 0.94rem);
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.09rem);
  --step-1: clamp(1.18rem, 1.1rem + 0.4vw, 1.4rem);
  --step-2: clamp(1.45rem, 1.3rem + 0.75vw, 1.95rem);
  --step-3: clamp(1.85rem, 1.55rem + 1.5vw, 2.75rem);
  --step-4: clamp(2.3rem, 1.7rem + 2.9vw, 4rem);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "Noto Sans", Arial, "Liberation Sans", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #101315;
    --surface: #161a1d;
    --card: #171b1e;
    --ink: #edf0ef;
    --ink-muted: #a9b1b4;
    --line: #262c30;
    --line-strong: #38403f;
    --accent: #57c3a6;
    --accent-strong: #7ad4bb;
    --accent-soft: #142520;
    --on-accent: #07130f;
    --focus: #57c3a6;
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  font-weight: 640;
  text-wrap: balance;
}

h1 { font-size: var(--step-4); letter-spacing: -0.035em; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); letter-spacing: -0.015em; }

p, ul, ol, dl { margin: 0 0 1.1em; }
p { max-width: var(--measure); text-wrap: pretty; }

a { color: var(--accent); text-underline-offset: 0.18em; text-decoration-thickness: from-font; }
a:hover { color: var(--accent-strong); }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 3px;
}

strong { font-weight: 640; }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ---------- layout ---------- */
.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

@media (min-width: 40rem) {
  .container { width: min(100% - 4rem, var(--container)); }
}

[id] { scroll-margin-top: 5.5rem; }

section { padding-block: clamp(3rem, 7vw, 5.5rem); }
section + section { border-top: 1px solid var(--line); }

.eyebrow {
  display: block;
  font-size: var(--step--1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 620;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.lead { font-size: var(--step-1); color: var(--ink-muted); line-height: 1.5; }

.section-head { margin-bottom: clamp(1.75rem, 4vw, 2.75rem); }
.section-head p { color: var(--ink-muted); margin-bottom: 0; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--on-accent);
  padding: 0.7rem 1.1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 20;
}
.skip-link:focus { left: 0; color: var(--on-accent); }

/* ---------- header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.25rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 660;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.06rem;
}
.brand:hover { color: var(--ink); }
.brand svg { display: block; }

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.site-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: var(--step--1);
  font-weight: 560;
}
.site-nav a:hover { color: var(--accent); text-decoration: underline; }

/* One primary verb at a time: the header button appears only after the hero
   button has scrolled out of view (script at the end of index.html).
   Small screens drop the nav rows entirely — they ate the fold. */
.site-header .header-cta { display: none; }
.site-header.cta-visible .header-cta { display: inline-flex; }
@media (max-width: 51.99rem) {
  .site-nav { display: none; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 620;
  font-size: var(--step-0);
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 120ms ease, background-color 120ms ease, border-color 120ms ease;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); color: var(--on-accent); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-sm { padding: 0.55rem 1.05rem; font-size: var(--step--1); }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  margin-top: 1.75rem;
}
.btn-note { font-size: var(--step--1); color: var(--ink-muted); margin: 0; }

/* ---------- hero ---------- */
.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(2.5rem, 6vw, 4.5rem); }

.hero-grid {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
  align-items: center;
}

@media (min-width: 62rem) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
}

.hero h1 { margin-bottom: 0.6rem; }
.hero .lead { max-width: 34ch; }

/* ---------- hero device renders ---------- */
.figure-card { margin: 0; }
.figure-card figcaption {
  font-size: var(--step--1);
  color: var(--ink-muted);
  margin-top: 1.6rem;
  max-width: 46ch;
}

.device-stack { position: relative; padding-bottom: 2.5rem; }

.device-browser {
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 18px 40px -24px rgba(16, 19, 21, 0.45);
}
.device-bar {
  display: block;
  height: 26px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.device-bar::before {
  content: "";
  display: block;
  margin: 9px 0 0 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line-strong);
  box-shadow: 13px 0 0 var(--line-strong), 26px 0 0 var(--line-strong);
}
.device-browser img { display: block; width: 100%; height: auto; }

.device-phone {
  position: absolute;
  right: -2.5%;
  bottom: -0.5rem;
  width: 23%;
  min-width: 84px;
  border: 5px solid var(--paper);
  outline: 1px solid var(--line-strong);
  border-radius: 14px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 14px 30px -18px rgba(16, 19, 21, 0.5);
}
.device-phone img { display: block; width: 100%; height: auto; }

/* ---------- before / after ---------- */
.ba-figure { margin: clamp(2rem, 5vw, 3rem) 0 0; }
.ba-grid { display: grid; gap: 1.25rem; }
@media (min-width: 46rem) { .ba-grid { grid-template-columns: 1fr 1fr; gap: 1.75rem; } }
.ba-grid img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
}
.ba-label {
  display: block;
  font-size: var(--step--1);
  font-weight: 620;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.6rem;
}
.ba-label-now { color: var(--accent); }
.ba-figure figcaption {
  font-size: var(--step--1);
  color: var(--ink-muted);
  margin-top: 1rem;
  max-width: 62ch;
}

/* ---------- steps ---------- */
.steps {
  display: grid;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step;
}
@media (min-width: 52rem) {
  .steps { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}
.steps li {
  border-top: 2px solid var(--accent);
  padding-top: 1.1rem;
}
.steps h3 { margin-bottom: 0.35rem; }
.steps p { color: var(--ink-muted); margin-bottom: 0; }
.step-num {
  display: block;
  font-size: var(--step--1);
  font-weight: 660;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.6rem;
  font-variant-numeric: tabular-nums;
}

/* ---------- how / prose panel ---------- */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.75rem);
}
.panel > :last-child { margin-bottom: 0; }

/* ---------- packages ---------- */
.packages {
  display: grid;
  gap: 1.25rem;
  margin: 0 0 1.75rem;
  padding: 0;
  list-style: none;
}
@media (min-width: 54rem) {
  .packages { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
}

.package {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.4rem, 3vw, 1.9rem);
  display: flex;
  flex-direction: column;
}
.package h3 { margin-bottom: 0.15rem; }
.package .price {
  font-size: var(--step-2);
  font-weight: 660;
  letter-spacing: -0.03em;
  color: var(--ink);
  display: block;
  margin-bottom: 0.15rem;
  font-variant-numeric: tabular-nums;
}
.package .price-note { font-size: var(--step--1); color: var(--ink-muted); margin-bottom: 1.1rem; }
.package ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  border-top: 1px solid var(--line);
  padding-top: 1.1rem;
  font-size: var(--step--1);
  line-height: 1.55;
}
.package li {
  display: grid;
  grid-template-columns: 1.15rem 1fr;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}
.package li::before {
  content: "";
  margin-top: 0.42em;
  width: 0.68rem;
  height: 0.36rem;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

.extras {
  display: grid;
  gap: 1rem;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}
@media (min-width: 40rem) {
  .extras { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
}
.extras li {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  font-size: var(--step--1);
  color: var(--ink-muted);
}
.extras strong { color: var(--ink); display: block; font-size: var(--step-0); margin-bottom: 0.15rem; }

.fineprint { font-size: var(--step--1); color: var(--ink-muted); max-width: 70ch; }
.guarantee { max-width: 70ch; padding: 0.9rem 1.1rem; border-left: 3px solid var(--accent, #0f6b56); background: var(--accent-soft); border-radius: 0.4rem; margin: 1rem 0 1.5rem; }
.guarantee strong { color: var(--ink); }
.refdeal { max-width: 70ch; margin: 0 0 1.5rem; color: var(--ink-muted); }
.refdeal strong { color: var(--ink); }
.price-std { font-size: 0.5em; font-weight: 400; color: var(--ink-muted); margin-left: 0.35em; vertical-align: middle; }

/* ---------- faq ---------- */
.faq { max-width: 52rem; }
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq details[open] summary { color: var(--accent); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 2.5rem 1.1rem 0;
  font-weight: 620;
  font-size: var(--step-1);
  letter-spacing: -0.012em;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  position: absolute;
  right: 0.55rem;
  top: 1.55rem;
  width: 0.6rem;
  height: 0.6rem;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  transition: transform 150ms ease;
}
.faq details[open] summary::after { transform: rotate(-135deg); top: 1.75rem; }
.faq details > p, .faq details > ul { color: var(--ink-muted); margin-bottom: 1.35rem; max-width: 68ch; }

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
}
@media (min-width: 54rem) {
  .contact-grid { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
}
.details-list { margin: 0; font-size: var(--step--1); }
.details-list dt {
  color: var(--ink-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 620;
  margin-top: 1.1rem;
}
.details-list dt:first-child { margin-top: 0; }
.details-list dd { margin: 0.2rem 0 0; }

/* ---------- footer ---------- */
.site-footer {
  background: #101315;
  color: #c8cecd;
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
  font-size: var(--step--1);
}
.site-footer a { color: #8fd8c4; }
.site-footer a:hover { color: #b6ead9; }
.site-footer :focus-visible { outline-color: #8fd8c4; }
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  justify-content: space-between;
  align-items: flex-start;
}
.site-footer p { margin-bottom: 0; max-width: 48ch; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.5rem; }

/* ---------- arrival strip (people who came from the e-mail) ---------- */
.arrival {
  margin: 0;
  max-width: none;
  background: var(--accent-soft);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  font-size: var(--step--1);
  color: var(--ink);
  padding-block: 0.75rem;
}
.arrival .container { display: block; max-width: var(--container); }

/* ---------- hero fact line ---------- */
.factline {
  margin: 1.5rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  color: var(--ink-muted);
  max-width: 46ch;
}

/* ---------- pricing extras ---------- */
.package-pick {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.pick-badge {
  display: inline-block;
  margin: 0 0 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.72rem;
  font-weight: 660;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.grid-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin: 0 0 2rem;
  max-width: none;
}
.grid-cta span { font-size: var(--step--1); color: var(--ink-muted); }

/* ---------- contact form ---------- */
.contact-form { margin-top: 1.75rem; max-width: 30rem; }
.field { margin-bottom: 1rem; }
.field label {
  display: block;
  font-size: var(--step--1);
  font-weight: 620;
  margin-bottom: 0.35rem;
}
.field .opt { font-weight: 500; color: var(--ink-muted); }
.field input,
.field textarea {
  width: 100%;
  font: inherit;
  font-size: var(--step-0);
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.8rem;
}
.field textarea { resize: vertical; min-height: 6rem; }
.field input:focus-visible,
.field textarea:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; border-color: var(--accent); }
.field input::placeholder,
.field textarea::placeholder { color: color-mix(in srgb, var(--ink-muted) 70%, transparent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.contact-form button { margin-top: 0.4rem; }
.form-note {
  font-size: var(--step--1);
  color: var(--ink-muted);
  margin: 1rem 0 0;
  max-width: 40ch;
}

/* ---------- legal page ---------- */
.legal { padding-block: clamp(2.5rem, 6vw, 4rem); }
.legal h1 { font-size: var(--step-3); }
.legal h2 {
  font-size: var(--step-1);
  margin-top: 2.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}
.legal h2:first-of-type { margin-top: 2rem; }
.legal h3 { font-size: var(--step-0); margin-top: 1.6rem; letter-spacing: 0; }
.legal p, .legal li { max-width: var(--measure); }
.legal ul { padding-left: 1.15rem; }
.legal li { margin-bottom: 0.45rem; }
.legal .updated { font-size: var(--step--1); color: var(--ink-muted); }

.callout {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 1.9rem);
  margin: 1.5rem 0 2rem;
  scroll-margin-top: 5.5rem;
}
.callout > :last-child { margin-bottom: 0; }
.callout h2 { margin-top: 0; padding-top: 0; border-top: 0; }

.toc { font-size: var(--step--1); }
.toc ul { padding-left: 1.15rem; }
.toc li { margin-bottom: 0.3rem; }

/* SVG labels inside the illustration inherit the page font */
.figure-card svg text {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 620;
  letter-spacing: 0.12em;
  fill: var(--ink-muted);
}