/*
  Color system: one cool neutral ramp, one blue accent, one danger hue.
  Built in OKLCH (neutral hue 255, accent hue 262), Radix-style steps by role.
  Components use only the semantic tokens below, never the primitives.
  The accent means "you can click this": buttons, links, focus. Nothing decorative.
*/
:root {
  color-scheme: light;

  /* Primitives */
  --gray-1: #fafbfc;
  --gray-2: #f4f6f8;
  --gray-3: #eaedf1;
  --gray-4: #e1e5e9;
  --gray-6: #cfd3d9;
  --gray-7: #bcc1c8;
  --gray-8: #878d94;
  --gray-9: #6f757d;
  --gray-11: #50565d;
  --gray-12: #15191e;
  --blue-8: #5488ec;
  --blue-9: #245fd4;
  --blue-10: #1850c0;
  --blue-11: #2559bf;
  --red-1: #fff2f0;
  --red-11: #b32322;

  /* Semantic tokens (measured: text-secondary on bg-component 6.3:1, white on accent-solid 5.7:1) */
  --color-bg-page: var(--gray-1);
  --color-bg-subtle: var(--gray-2);
  --color-bg-component: var(--gray-3);
  --color-bg-component-hover: var(--gray-4);
  --color-bg-surface: #fff;
  --color-border-subtle: var(--gray-6);
  --color-border: var(--gray-7);
  --color-border-control: var(--gray-8);
  --color-text-primary: var(--gray-12);
  --color-text-secondary: var(--gray-11);
  --color-text-placeholder: var(--gray-9);
  --color-accent-solid: var(--blue-9);
  --color-accent-solid-hover: var(--blue-10);
  --color-text-on-accent: #fff;
  --color-accent-text: var(--blue-11);
  --color-focus-ring: var(--blue-8);
  --color-danger-bg: var(--red-1);
  --color-danger-text: var(--red-11);

  --display: 'Source Sans 3', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; font: 16px/1.6 Inter, Arial, sans-serif; color: var(--color-text-primary); background: var(--color-bg-page); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-underline-offset: 4px; }
button, input, select, textarea { font: inherit; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--color-focus-ring); outline-offset: 3px; border-radius: 4px; }
img { max-width: 100%; display: block; }

.wrap { width: min(1200px, calc(100% - 80px)); margin: auto; }
.skip { position: absolute; top: -80px; background: var(--color-bg-surface); padding: 12px; z-index: 20; }
.skip:focus { top: 0; }

/* Header */
header { position: sticky; top: 0; z-index: 10; background: var(--color-bg-page); border-bottom: 1px solid var(--color-border-subtle); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 24px; }
.brand { display: inline-flex; align-items: center; text-decoration: none; font: 700 22px/1 var(--display); letter-spacing: 0; }
.brand-icon { width: 40px; height: 40px; object-fit: contain; display: block; flex: none; margin-right: 10px; }
nav { display: flex; gap: 28px; align-items: center; }
nav > a { font-size: 14px; font-weight: 500; text-decoration: none; color: var(--color-text-secondary); transition: color .15s; }
nav > a:not(.button):hover { color: var(--color-text-primary); }

/* Buttons: one filled primary per view, everything else neutral */
.button {
  display: inline-flex; gap: 20px; align-items: center; justify-content: space-between;
  padding-block: 14px; padding-inline: 22px 20px; min-height: 50px;
  background: var(--color-accent-solid); border: 0; border-radius: 8px;
  color: var(--color-text-on-accent); font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer;
  transition: background .15s;
}
.button:hover { background: var(--color-accent-solid-hover); }
.button span { font-size: 17px; line-height: 1; transition: transform .15s; }
.button:hover span { transform: translateX(3px); }
.button.small { padding-block: 8px; padding-inline: 14px 12px; min-height: 38px; font-size: 14px; gap: 12px; border-radius: 7px; }
nav > a.button.secondary, .button.secondary { background: var(--color-bg-component); color: var(--color-text-primary); }
.button.secondary:hover { background: var(--color-bg-component-hover); }
.button[disabled] { opacity: .6; cursor: progress; }

/* Type */
.eyebrow { font: 500 12px/1.5 var(--mono); letter-spacing: .02em; text-transform: uppercase; margin: 0 0 18px; color: var(--color-text-secondary); }
h1, h2 { font-family: var(--display); font-weight: 600; line-height: 1.12; letter-spacing: 0; margin: 0 0 24px; text-wrap: balance; }
h1 { font-size: 60px; }
h2 { font-size: 44px; }
h3 { font-size: 19px; line-height: 1.3; margin: 0 0 8px; font-weight: 600; }
p { margin: 0 0 20px; text-wrap: pretty; }

/* Hero */
.hero { background: var(--color-bg-subtle); border-bottom: 1px solid var(--color-border-subtle); }
.hero-inner { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: center; padding-block: 80px 88px; }
.hero-copy { font-size: 18px; line-height: 1.65; color: var(--color-text-secondary); max-width: 500px; margin-bottom: 32px; }
.hero-actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.hero-link { font-size: 15px; font-weight: 500; color: var(--color-accent-text); }
.hero-photo { margin: 0; padding: 6px; background: var(--color-bg-surface); border: 1px solid var(--color-border-subtle); border-radius: 16px; box-shadow: 0 1px 2px #15191e0d, 0 12px 32px -12px #15191e26; }
.hero-photo img { height: auto; aspect-ratio: 4 / 3; object-fit: cover; object-position: 68% center; width: 100%; border-radius: 10px; }
.hero-photo figcaption { display: flex; justify-content: space-between; gap: 16px; padding: 10px 8px 4px; font: 500 12px var(--mono); color: var(--color-text-secondary); text-transform: uppercase; }

.condition-strip { border-bottom: 1px solid var(--color-border-subtle); font-size: 14px; font-weight: 500; color: var(--color-text-secondary); }
.condition-strip ul { list-style: none; margin: auto; padding-inline: 0; display: flex; justify-content: space-between; padding-block: 16px; gap: 20px; }
.condition-strip li::before { content: '✓'; margin-right: 10px; color: var(--color-text-primary); font-weight: 700; }

/* Sections */
.section { padding-block: 96px; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: end; margin-bottom: 40px; }
.section-head > p { max-width: 470px; color: var(--color-text-secondary); font-size: 17px; }

.equipment-list { border-top: 1px solid var(--color-border); }
.equipment-row {
  display: grid; grid-template-columns: 55px 1fr 200px 30px; align-items: center; gap: 20px;
  border-bottom: 1px solid var(--color-border-subtle); padding: 24px 12px; text-decoration: none; transition: background .15s;
}
.equipment-row:hover { background: var(--color-bg-component); }
.equipment-row:hover .row-arrow { transform: translateX(4px); color: var(--color-accent-text); }
.row-no { font: 500 13px var(--mono); color: var(--color-text-secondary); }
.equipment-row h3 { font: 600 20px/1.3 var(--display); letter-spacing: 0; margin-bottom: 6px; }
.equipment-row p { font: 400 16px/1.5 Arial, Helvetica, sans-serif; color: var(--color-text-secondary); margin: 0; }
.tag { justify-self: start; font: 400 13px Arial, Helvetica, sans-serif; color: var(--color-text-secondary); padding: 4px 0; }
.equipment-row:hover .tag { background: var(--color-bg-surface); }
.row-arrow { font-size: 20px; color: var(--color-text-secondary); transition: transform .15s, color .15s; }
.small-note { font-size: 14px; color: var(--color-text-secondary); margin-top: 20px; }

.process-band { background: var(--color-bg-subtle); border-block: 1px solid var(--color-border-subtle); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; }
.steps article { background: var(--color-bg-surface); border: 1px solid var(--color-border-subtle); border-radius: 12px; padding: 28px; }
.steps b { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--color-bg-component); font: 600 13px var(--mono); margin-bottom: 32px; }
.steps h3 { font: 600 20px/1.3 var(--display); }
.steps p { color: var(--color-text-secondary); font-size: 15px; margin: 0; }

/* Sell form */
.sell-section { display: grid; grid-template-columns: .85fr 1.3fr; gap: 80px; align-items: start; }
.sell-intro { position: sticky; top: 110px; }
.sell-intro > p:not(.eyebrow) { color: var(--color-text-secondary); font-size: 17px; }
.contact-person { display: flex; align-items: center; gap: 14px; margin: 32px 0; }
.avatar { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--color-bg-component); font: 600 13px var(--mono); flex: none; }
.contact-person strong { display: block; font-size: 15px; font-weight: 600; }
.contact-person a { display: block; font-size: 15px; color: var(--color-accent-text); }
.data-note { font-size: 14px; max-width: 340px; border-top: 1px solid var(--color-border-subtle); padding-top: 22px; color: var(--color-text-secondary); }
.data-note strong { color: var(--color-text-primary); display: block; margin-bottom: 6px; font-weight: 600; }

form#quoteForm { background: var(--color-bg-surface); border: 1px solid var(--color-border-subtle); border-radius: 16px; padding: 36px; box-shadow: 0 1px 2px #15191e0d, 0 12px 32px -16px #15191e1f; }
fieldset { border: 0; margin: 0 0 32px; padding: 0; min-width: 0; }
.form-head { display: flex; width: 100%; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--color-border-subtle); padding: 0 0 14px; margin-bottom: 20px; font: 600 19px var(--display); }
.form-head .step { font: 500 12px var(--mono); color: var(--color-text-secondary); text-transform: uppercase; }
.item { padding-bottom: 18px; margin-bottom: 18px; border-bottom: 1px dashed var(--color-border-subtle); }
.item-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font: 500 12px var(--mono); color: var(--color-text-secondary); }
.remove { border: 0; background: none; font-size: 14px; cursor: pointer; color: var(--color-text-secondary); text-decoration: underline; padding: 4px; }
.remove:hover { color: var(--color-text-primary); }
.item-fields { display: grid; grid-template-columns: 1fr 1fr 80px; gap: 12px; }
.item-model { grid-column: 1 / -1; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { display: block; font-size: 14px; font-weight: 500; }
label span { font-weight: 400; color: var(--color-text-secondary); }
input, select, textarea {
  display: block; width: 100%; min-width: 0; margin-top: 6px;
  background: var(--color-bg-surface); border: 1px solid var(--color-border-control); border-radius: 8px;
  padding: 10px 12px; font-size: 16px; color: var(--color-text-primary); transition: border-color .15s;
}
::placeholder { color: var(--color-text-placeholder); }
input[type=file] { border-style: dashed; padding: 14px 12px; font-size: 14px; cursor: pointer; }
textarea { resize: vertical; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--color-focus-ring); outline-offset: 1px; }
input:user-invalid { border-color: var(--color-danger-text); }
.add { color: var(--color-accent-text); border: 0; background: none; padding: 4px 0; font-weight: 600; font-size: 15px; cursor: pointer; }
.add:hover { text-decoration: underline; }
.upload { margin-top: 20px; }
.notes-label { margin-top: 16px; }
.submit { width: 100%; }
.form-note { font-size: 14px; color: var(--color-text-secondary); margin: 12px 0 0; text-align: center; }

#formStatus:empty { display: none; }
#formStatus { margin-top: 16px; padding: 18px; border-radius: 10px; background: var(--color-bg-subtle); border: 1px solid var(--color-border-subtle); font-size: 15px; }
#formStatus.error { background: var(--color-danger-bg); color: var(--color-danger-text); }
#formStatus p { margin: 0 0 10px; }
#formStatus a { color: var(--color-accent-text); }
#formStatus textarea { font: 13px/1.5 var(--mono); height: 160px; margin-bottom: 10px; color: var(--color-text-primary); }
#formStatus .actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* FAQ */
.faq-band { background: var(--color-bg-subtle); border-top: 1px solid var(--color-border-subtle); }
.faq-layout { display: grid; grid-template-columns: .85fr 1.3fr; gap: 80px; }
details { border-bottom: 1px solid var(--color-border-subtle); padding: 20px 0; }
details:first-child { padding-top: 0; }
summary { font-size: 17px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 20px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; font: 400 22px/1 var(--mono); color: var(--color-text-secondary); transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 12px 0 0; font-size: 15px; color: var(--color-text-secondary); max-width: 620px; }

footer { padding: 36px 0; border-top: 1px solid var(--color-border-subtle); }
footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
footer p, footer .wrap > span { font-size: 14px; color: var(--color-text-secondary); margin: 0; }
footer .brand { font-size: 20px; }

@media (max-width: 1000px) {
  .wrap { width: calc(100% - 48px); }
  h1 { font-size: 52px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; padding-block: 64px 72px; }
  .hero-photo img { aspect-ratio: 16 / 9; }
  .section-head, .sell-section, .faq-layout { gap: 40px; }
  .equipment-row { grid-template-columns: 35px 1fr 150px 25px; }
  .steps { gap: 12px; }
  .steps article { padding: 22px; }
  .condition-strip ul { flex-wrap: wrap; justify-content: flex-start; column-gap: 32px; }
}

@media (max-width: 700px) {
  .wrap { width: calc(100% - 32px); }
  .nav { min-height: 60px; gap: 8px; }
  .brand { font-size: 19px; }
  .brand-icon { width: 34px; height: 34px; margin-right: 8px; }
  nav > a:not(.button) { display: none; }

  .hero-inner { padding-block: 44px 48px; gap: 36px; }
  h1 { font-size: 40px; }
  .hero-copy { font-size: 16px; }
  .hero-actions { gap: 20px; }
  .hero-photo { border-radius: 14px; }
  .hero-photo img { border-radius: 8px; }
  .hero-photo figcaption span:last-child { display: none; }

  .condition-strip ul { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; padding-block: 16px; }
  .section { padding-block: 64px; }
  h2 { font-size: 34px; }
  .section-head h2 br { display: none; }
  .section-head, .sell-section, .faq-layout { grid-template-columns: 1fr; gap: 20px; }
  .section-head > p { font-size: 16px; margin-bottom: 0; }
  .sell-intro { position: static; }
  .equipment-row { grid-template-columns: 1fr 24px; gap: 12px; padding: 20px 0; }
  .equipment-row:hover { background: none; }
  .row-no, .tag { display: none; }
  .equipment-row h3 { font-size: 20px; }
  .steps { grid-template-columns: 1fr; margin-top: 28px; }
  .steps b { margin-bottom: 16px; }
  .contact-person { margin: 20px 0; }
  .data-note { max-width: none; }
  form#quoteForm { padding: 22px 18px; border-radius: 14px; }
  .fields { grid-template-columns: 1fr; gap: 14px; }
  .item-fields { grid-template-columns: 1fr 1fr; }
  .item-fields label:nth-child(3) { grid-column: 1 / -1; }
  footer .wrap { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}