/* ALBATROS I KO TOV — swiss-grid on oxford navy, one azure accent.
   Margin index, left ledger, command panel as a breaker desk. */

:root {
  --bg: #122033;
  --bg-alt: #0c1830;
  --bg-deep: #081226;
  --ink: #e8f1f8;
  --ink-soft: #b4c4d4;
  --ink-invert: #e8f1f8;
  --accent: #3ec6ff;
  --accent-soft: #14344c;
  --line: #2a4462;
  --line-strong: #7f9bb6;
  --sheet: #e7f1f7;
  --ink-sheet: #102033;
  --ink-sheet-soft: #3c5166;
  --font-display: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --tracking-display: -0.045em;
  --radius: 0px;
  --radius-lg: 0px;
  --shadow: none;
  --container: 1120px;
  --section-y: clamp(2.75rem, 1.4rem + 4.5vw, 5.5rem);
  color-scheme: dark;
}

body { background: var(--bg); }

.site-header {
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.site-header.is-scrolled { border-bottom-color: var(--line-strong); }
.site-header__brand { display: flex; align-items: center; line-height: 0; }
.site-header__brand img { width: clamp(148px, 28vw, 196px); height: auto; }
.nav a {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 600;
  opacity: 0.72;
}
.nav a:hover { opacity: 1; }

.btn--primary { color: var(--bg-deep); background: var(--accent); }
.btn--primary:hover { color: var(--bg-deep); }
.btn--ghost { color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { background: var(--ink); color: var(--bg-deep); border-color: var(--ink); }

.section--alt { background: var(--bg-alt); }
.section { scroll-margin-top: 4.75rem; }

.rail { align-items: start; }
.rail__n {
  margin: 0 0 0.75rem;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.block-head { max-width: 40rem; margin-bottom: clamp(1.5rem, 3vw, 2.5rem); }
.block-head h2 { margin-top: 0.35rem; }
.block-head .lede { margin-top: 0.8rem; }

h1, h2, h3 { font-weight: 600; }
h1 { max-width: 100%; }

.hero__grid { display: grid; gap: var(--gap); align-items: end; }
.hero__copy p { max-width: 38rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.hero__figure { margin: 0; }
.hero__figure img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}
.hero__figure figcaption,
.stage figcaption,
.plate figcaption p {
  margin-top: 0.55rem;
  color: var(--ink-soft);
  font-size: var(--step--1);
}
.hero__figure figcaption span,
.plate__i {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.12em;
  margin-right: 0.55rem;
}

.ledger { list-style: none; padding: 0; }
.ledger li {
  display: grid;
  gap: 0.35rem 1.25rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}
.ledger li:last-child { border-bottom: 1px solid var(--line); }
.ledger__i {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
}
.ledger h3 { font-size: var(--step-1); margin-bottom: 0.45rem; }
.ledger p + p { margin-top: 0.7rem; }

.plates { border-bottom: 1px solid var(--line); }
.plate {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}
.plate img { width: 100%; height: auto; border: 1px solid var(--line); }
.plate h3 { font-size: var(--step-1); margin-bottom: 0.35rem; }

.company { display: grid; gap: var(--gap); }
.company p { max-width: 40rem; }
.facts {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}
.facts div { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.facts dt {
  font-size: var(--step-3);
  font-weight: 600;
  letter-spacing: var(--tracking-display);
  line-height: 1;
  color: var(--ink);
}
.facts dd { margin: 0.4rem 0 0; color: var(--ink-soft); font-size: var(--step--1); }

.steps { list-style: none; padding: 0; margin: 0; }
.steps li {
  display: grid;
  gap: 0.25rem 1rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--line);
}
.steps li:last-child { border-bottom: 1px solid var(--line); }
.steps span {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.14em;
}
.steps h3 { font-size: var(--step-1); }
.steps p { color: var(--ink-soft); margin: 0; }

.faq { border-bottom: 1px solid var(--line); }
.faq article { padding: 1.15rem 0; border-top: 1px solid var(--line); }
.faq h3 { font-size: var(--step-1); margin-bottom: 0.4rem; }
.faq p { margin: 0; color: var(--ink-soft); max-width: 42rem; }

.cmd__layout { display: grid; gap: var(--gap); align-items: start; }
.cmd__controls { display: grid; gap: 1.25rem; }
.cmd fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 0.45rem; }
.cmd legend {
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.brk {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.7rem 0.75rem;
  border: 1px solid var(--line);
  background: var(--bg-deep);
  cursor: pointer;
}
.brk--small { grid-template-columns: minmax(0, 1fr) auto; }
.brk--small .brk__copy { grid-column: 1; }
.brk--small .brk__track { grid-column: 2; }
.brk input {
  position: absolute;
  opacity: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}
.brk__lamp {
  width: 0.55rem;
  height: 0.55rem;
  background: var(--line-strong);
}
.brk__name { display: block; font-weight: 600; font-size: var(--step--1); line-height: 1.3; }
.brk__meta { display: block; color: var(--ink-soft); font-size: 0.78rem; margin-top: 0.15rem; }
.brk__track {
  width: 2.6rem;
  height: 1.35rem;
  border: 1px solid var(--line-strong);
  position: relative;
  flex: none;
}
.brk__knob {
  position: absolute;
  top: 0.12rem;
  left: 0.12rem;
  width: 0.95rem;
  height: 0.95rem;
  background: var(--ink-soft);
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease);
}
.brk:has(input:checked) {
  border-color: var(--accent);
}
.brk:has(input:checked) .brk__lamp,
.brk:has(input:checked) .brk__knob { background: var(--accent); }
.brk:has(input:checked) .brk__knob { transform: translateX(1.2rem); }
.brk:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }

.stage {
  margin: 0;
  background: var(--bg-deep);
  border: 1px solid var(--line);
  padding: 0.75rem 0.75rem 0.9rem;
}
.stage svg { width: 100%; height: auto; display: block; }
.ground { fill: color-mix(in srgb, var(--ink) 5%, var(--bg-deep)); stroke: var(--line); stroke-width: 1; }
.ring { fill: none; stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 5; }
.zone polygon,
.zone line,
.zone circle {
  fill: color-mix(in srgb, var(--ink) 8%, var(--bg-alt));
  stroke: var(--line-strong);
  stroke-width: 1.25;
  transition: fill 0.35s var(--ease), stroke 0.35s var(--ease);
}
.zone line { fill: none; }
.zone circle { fill: var(--ink-soft); }
.label {
  fill: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cmd:has(input[value="ws"]:checked) .zone-ws polygon,
.cmd:has(input[value="ws"]:checked) .zone-gr polygon,
.cmd:has(input[value="bm"]:checked) .zone-bm polygon,
.cmd:has(input[value="sec"]:checked) .zone-sec polygon,
.cmd:has(input[value="inv"]:checked) .zone-inv polygon {
  fill: color-mix(in srgb, var(--accent) 34%, var(--bg-deep));
  stroke: var(--accent);
}
.cmd:has(input[value="sec"]:checked) .zone-sec line { stroke: var(--accent); }
.cmd:has(input[value="sec"]:checked) .zone-sec circle { fill: var(--accent); }
.cmd:has(input[value="sec"]:checked) .ring { stroke: var(--accent); }
.cmd:has(input[value="ws"]:checked) .label-ws,
.cmd:has(input[value="ws"]:checked) .label-gr,
.cmd:has(input[value="bm"]:checked) .label-bm,
.cmd:has(input[value="sec"]:checked) .label-sec,
.cmd:has(input[value="inv"]:checked) .label-inv { fill: var(--ink); }

.offer {
  background: var(--sheet);
  color: var(--ink-sheet);
  padding: 1.15rem 1.2rem 1.3rem;
  border-top: 3px solid var(--accent);
}
.offer__kicker {
  margin: 0 0 0.8rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.sheet { display: none; }
.sheet__code {
  margin: 0;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--ink-sheet-soft);
}
.offer h3 { font-size: var(--step-1); margin: 0.2rem 0 0.8rem; color: var(--ink-sheet); }
.offer dl { margin: 0; }
.offer dl div { padding: 0.55rem 0; border-top: 1px solid color-mix(in srgb, var(--ink-sheet) 16%, var(--sheet)); }
.offer dt {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-sheet-soft);
}
.offer dd { margin: 0.2rem 0 0; color: var(--ink-sheet); }
.scope-line { display: none; margin: 0.9rem 0 0; color: var(--ink-sheet); }
.offer__fine { margin: 0.9rem 0 0; font-size: var(--step--1); color: var(--ink-sheet-soft); }

.cmd:has(input[value="ws"]:checked) .sheet-ws,
.cmd:has(input[value="bm"]:checked) .sheet-bm,
.cmd:has(input[value="sec"]:checked) .sheet-sec,
.cmd:has(input[value="inv"]:checked) .sheet-inv { display: block; }
.cmd:has(input[value="one"]:checked) .scope-one,
.cmd:has(input[value="multi"]:checked) .scope-multi,
.cmd:has(input[value="full"]:checked) .scope-full { display: block; }

.contact { display: grid; gap: var(--gap); }
.contact__card {
  font-style: normal;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.contact__card p + p { margin-top: 0.8rem; }
.contact__card a { color: var(--accent); }
.contact__form { display: grid; gap: 0.9rem; align-content: start; }
.field input,
.field textarea,
.field select {
  background: var(--bg-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  width: 100%;
}
.field select { padding: 0.85em 1em; }
.form-status[data-state="ok"] { color: var(--accent); }

.site-footer { background: var(--bg-deep); border-top: 1px solid var(--line); }
.footer__grid { display: grid; gap: 1.5rem; }
.footer__brand img { width: 168px; height: auto; }
.footer__grid a { color: var(--accent); }
.footer__grid nav { display: grid; gap: 0.35rem; }
.footer__grid nav a { color: var(--ink); text-decoration: none; }
.footer__grid nav a:hover { color: var(--accent); }
.site-footer__bottom { color: var(--ink-soft); }

@media (min-width: 700px) {
  .ledger li { grid-template-columns: 3rem 1fr; }
  .plate { grid-template-columns: 3rem minmax(180px, 280px) 1fr; align-items: start; }
  .facts { grid-template-columns: 1fr 1fr; }
  .facts div { padding-right: 1.5rem; }
  .facts div:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 1.5rem; }
  .facts div:nth-child(even) { padding-left: 1.5rem; }
  .steps li { grid-template-columns: 3rem 1fr; }
  .footer__grid { grid-template-columns: 1.2fr 1fr 0.8fr; align-items: start; }
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: end;
    gap: clamp(1.5rem, 3vw, 3rem);
  }
  .company { grid-template-columns: 1.15fr 0.85fr; align-items: start; }
  .contact { grid-template-columns: 0.85fr 1.15fr; align-items: start; }
  .cmd__layout { grid-template-columns: minmax(230px, 280px) minmax(0, 1fr) minmax(230px, 300px); }
}

@media (min-width: 1100px) {
  .rail {
    display: grid;
    grid-template-columns: 4.25rem minmax(0, 1fr);
    column-gap: 1.5rem;
  }
  .rail__n { position: sticky; top: 6.5rem; margin: 0.35rem 0 0; }
  .rail__body { border-left: 1px solid var(--line); padding-left: 1.75rem; }
}

@media (max-width: 699px) {
  .hero__actions .btn { width: 100%; }
}