/* QOTAN.ai — the whole design system.
   Control-room aesthetic: dark instrument ground, 1px rules, one process-amber
   accent for emphasis, status colours used only for status. */

:root {
  --bg: #0A1016;
  --surface: #101922;
  --surface-2: #15212C;
  --line: #1F2E3B;
  --line-strong: #2C4052;
  --text: #E7EDF2;
  --muted: #93A3B3;
  --faint: #6E8296;

  --accent: #F2A93B;        /* process amber: CTAs, key figures */
  --accent-ink: #1A1206;
  --ok: #3CC8A4;            /* status only */
  --warn: #F2A93B;
  --crit: #F0605D;

  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --max: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 4px;
}

*, *::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 { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; }
p { margin: 0; }

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

.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--accent); color: var(--accent-ink); padding: 8px 14px; z-index: 100;
}
.skip:focus { left: 8px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 16, 22, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 600 19px/1 var(--sans); letter-spacing: 0.02em; }
.brand svg { width: 28px; height: 28px; }
.brand em { font-style: normal; color: var(--accent); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  text-decoration: none; color: var(--muted);
  font: 500 13px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
  padding: 10px 14px; border-radius: var(--radius);
}
.nav a:hover { color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }
.nav .btn { margin-left: 10px; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line-strong); color: var(--text);
  width: 44px; height: 44px; border-radius: var(--radius); cursor: pointer; padding: 0;
  place-items: center;
}

@media (max-width: 860px) {
  .nav-toggle { display: grid; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 68px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 20px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
  .nav a[aria-current="page"] { box-shadow: none; color: var(--accent); }
  .nav .btn { margin: 16px 0 0; justify-content: center; padding: 15px 16px; }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 13px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
  text-decoration: none; padding: 14px 20px; border-radius: var(--radius);
  border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink) !important;
  cursor: pointer; transition: filter .15s;
}
.btn:hover { filter: brightness(1.1); }
.btn.ghost { background: transparent; color: var(--text) !important; border-color: var(--line-strong); }
.btn.ghost:hover { border-color: var(--muted); filter: none; }
.nav .btn { padding: 11px 16px; }

/* ---------- Type helpers ---------- */

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 20px;
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: currentColor; }

.lede { font-size: clamp(18px, 2vw, 20px); color: var(--muted); max-width: 60ch; }

h1 { font-size: clamp(36px, 6vw, 62px); }
h2 { font-size: clamp(28px, 3.6vw, 42px); }
h3 { font-size: 20px; letter-spacing: -0.01em; }

/* ---------- Sections ---------- */

.section { padding: clamp(64px, 9vw, 120px) 0; border-bottom: 1px solid var(--line); }
.section.alt { background: var(--surface); }
.section.alt .card { background: var(--surface); }
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-head h2 + p { margin-top: 18px; }

.page-hero { padding: clamp(64px, 9vw, 112px) 0 clamp(48px, 6vw, 80px); border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 20ch; }
.page-hero .lede { margin-top: 24px; }

/* ---------- Home hero ---------- */

.hero { padding: clamp(56px, 8vw, 104px) 0; border-bottom: 1px solid var(--line); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { margin-top: 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
@media (max-width: 960px) { .hero .wrap { grid-template-columns: 1fr; } }

/* Control-room panel (illustrative) */
.panel {
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: 6px;
  font-family: var(--mono); font-size: 13px; min-width: 0;
}
.panel-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--muted);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
}
.live { display: inline-flex; align-items: center; gap: 8px; color: var(--ok); }
.live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--ok); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: 0.3; } }

.panel-stats { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--line); }
.panel-stats div { padding: 14px 16px; border-right: 1px solid var(--line); min-width: 0; }
.panel-stats div:last-child { border-right: 0; }
.panel-stats b { display: block; font-size: 22px; font-weight: 500; color: var(--text); }
.panel-stats small { color: var(--faint); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; }
.panel-stats .strike b { color: var(--faint); text-decoration: line-through; text-decoration-thickness: 1px; }
.panel-stats .hot b { color: var(--accent); }

.panel-trend { padding: 12px 16px 8px; border-bottom: 1px solid var(--line); }
.panel-trend svg { width: 100%; height: 72px; }
.panel-trend .label { display: flex; justify-content: space-between; gap: 8px; color: var(--faint); font-size: 11px; padding-bottom: 8px; }

.alarm-list { list-style: none; margin: 0; padding: 6px 0; }
.alarm-list li { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; padding: 10px 16px; }
.alarm-list li + li { border-top: 1px dashed var(--line); }
.sev { font-size: 10px; font-weight: 600; letter-spacing: 0.08em; padding: 3px 6px; border-radius: 2px; height: fit-content; margin-top: 2px; }
.sev.crit { background: rgba(240, 96, 93, .14); color: var(--crit); }
.sev.warn { background: rgba(242, 169, 59, .14); color: var(--warn); }
.sev.ok { background: rgba(60, 200, 164, .12); color: var(--ok); }
.alarm-list strong { font-weight: 500; color: var(--text); }
.alarm-list .detail { grid-column: 2; color: var(--muted); font-size: 12px; line-height: 1.5; }
.panel-note { padding: 10px 16px; border-top: 1px solid var(--line); color: var(--faint); font-size: 11px; }

/* ---------- Grids & cards ---------- */

.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card { background: var(--bg); padding: clamp(24px, 3vw, 36px); display: flex; flex-direction: column; gap: 14px; }
.card p { color: var(--muted); font-size: 16px; }
.card .icon { width: 36px; height: 36px; color: var(--accent); }
a.card { text-decoration: none; transition: background .15s; }
a.card:hover { background: var(--surface); }
.section.alt a.card:hover { background: var(--surface-2); }
.card .more { margin-top: auto; padding-top: 8px; font: 500 12px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }

/* ---------- Split feature ---------- */

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 88px); align-items: center; }
.split > * { min-width: 0; }
.split.reverse > :first-child { order: 2; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split.reverse > :first-child { order: 0; } }
.split h2 + p, .split p + p { margin-top: 18px; }
.split .lede { max-width: none; }

.checks { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; }
.checks li { position: relative; padding-left: 30px; color: var(--muted); }
.checks li strong { color: var(--text); font-weight: 500; }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 8px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

/* Funnel graphic: alarm flood -> actionable */
.funnel { display: grid; gap: 10px; font-family: var(--mono); }
.funnel .row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 16px; }
.funnel .bar { height: 44px; border-radius: 3px; background: var(--surface-2); border: 1px solid var(--line-strong); display: flex; align-items: center; padding: 0 14px; font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; }
.funnel .row:nth-child(1) .bar { width: 100%; }
.funnel .row:nth-child(2) .bar { width: 72%; }
.funnel .row:nth-child(3) .bar { width: 46%; min-width: 170px; }
.funnel .row:nth-child(4) .bar { width: 26%; min-width: 170px; background: rgba(242,169,59,.12); border-color: var(--accent); color: var(--accent); }
.funnel .n { font-size: 20px; color: var(--text); min-width: 3ch; text-align: right; }
.funnel-caption { margin-top: 16px; font: 12px/1.5 var(--mono); color: var(--faint); }

/* Maintenance timeline */
.timeline { border: 1px solid var(--line-strong); border-radius: 6px; background: var(--surface); font-family: var(--mono); font-size: 13px; overflow: hidden; }
.timeline-head, .timeline-row { display: grid; grid-template-columns: 1.1fr 2fr; align-items: center; }
.timeline-head { color: var(--faint); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; border-bottom: 1px solid var(--line); }
.timeline-head > div, .timeline-row > div { padding: 14px 16px; min-width: 0; }
.timeline-head .weeks { display: flex; justify-content: space-between; }
.timeline-row + .timeline-row { border-top: 1px solid var(--line); }
.timeline-row > div:last-child { padding-top: 34px; }
.timeline-row .asset strong { display: block; font-weight: 500; color: var(--text); }
.timeline-row .asset small { color: var(--faint); font-size: 11px; }
.track { position: relative; height: 10px; background: var(--surface-2); border-radius: 5px; }
.track i { position: absolute; top: 0; bottom: 0; left: 0; border-radius: 5px; background: linear-gradient(90deg, rgba(60,200,164,.45), rgba(242,169,59,.75)); }
.track i.crit { background: linear-gradient(90deg, rgba(242,169,59,.6), rgba(240,96,93,.85)); }
.track b { position: absolute; top: -5px; width: 2px; height: 20px; background: var(--text); }
.track em { position: absolute; top: -24px; transform: translateX(-50%); font-style: normal; font-size: 11px; color: var(--accent); white-space: nowrap; }
.timeline-foot { padding: 10px 16px; border-top: 1px solid var(--line); color: var(--faint); font-size: 11px; }
@media (max-width: 560px) {
  .timeline-head, .timeline-row { grid-template-columns: 1fr; }
  .timeline-head .weeks { display: none; }
  .timeline-row > div:first-child { padding-bottom: 0; }
  .track em { transform: translateX(-80%); }
}

/* Steps */
.steps { counter-reset: step; }
.steps .card h3::before {
  counter-increment: step; content: "0" counter(step);
  display: block; font: 500 12px/1 var(--mono); color: var(--accent); letter-spacing: 0.1em; margin-bottom: 16px;
}

/* Tag list */
ul.tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.tags li { list-style: none; font: 500 12px/1 var(--mono); letter-spacing: 0.04em; color: var(--muted); border: 1px solid var(--line-strong); padding: 9px 12px; border-radius: 3px; }

/* ---------- Solutions page ---------- */

.subnav { position: sticky; top: 68px; z-index: 40; background: var(--bg); border-bottom: 1px solid var(--line); }
.subnav .wrap { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.subnav .wrap::-webkit-scrollbar { display: none; }
.subnav a { flex: none; padding: 16px 14px; text-decoration: none; color: var(--muted); font: 500 12px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.subnav a:first-child { padding-left: 0; }
.subnav a:hover { color: var(--text); }

.solution { scroll-margin-top: 130px; }
.solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 88px); }
.solution-grid > * { min-width: 0; }
@media (max-width: 900px) { .solution-grid { grid-template-columns: 1fr; } }
.solution-grid h2 + p, .solution-grid p + p { margin-top: 18px; }
.solution-grid .lede { max-width: none; }

.io { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; align-self: start; }
.io > div { background: var(--surface); padding: 22px 24px; }
.io h4 { margin: 0 0 12px; font: 500 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.io ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 15px; display: grid; gap: 6px; }

/* ---------- Company ---------- */

.statement { font-size: clamp(22px, 2.6vw, 30px); line-height: 1.4; letter-spacing: -0.01em; max-width: 34ch; }
.statement em { font-style: normal; color: var(--accent); }

/* ---------- CTA band ---------- */

.cta { padding: clamp(64px, 8vw, 104px) 0; }
.cta .wrap { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta h2 { max-width: 20ch; }
.cta p { margin-top: 16px; color: var(--muted); max-width: 52ch; }

/* ---------- Contact ---------- */

.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(32px, 6vw, 80px); }
.contact-grid > * { min-width: 0; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }

form { display: grid; gap: 20px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }
label { display: grid; gap: 8px; font: 500 12px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
input, select, textarea {
  width: 100%; font: 400 16px/1.4 var(--sans); color: var(--text);
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 13px 14px;
}
textarea { min-height: 150px; resize: vertical; }
select {
  appearance: none; -webkit-appearance: none; padding-right: 40px;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 22px) 50%, calc(100% - 17px) 50%; background-size: 5px 5px; background-repeat: no-repeat;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: 14px; color: var(--faint); }
form .btn { justify-self: start; }

.aside-block { border-top: 1px solid var(--line); padding: 24px 0; }
.aside-block:first-child { border-top: 0; padding-top: 0; }
.aside-block h3 { font-size: 17px; margin-bottom: 8px; }
.aside-block p { color: var(--muted); font-size: 16px; }
.aside-block a { color: var(--accent); }

/* ---------- Footer ---------- */

.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding: 56px 0 32px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
@media (max-width: 720px) { .footer-top { grid-template-columns: 1fr 1fr; } .footer-top > :first-child { grid-column: 1 / -1; } }
.footer-top p { color: var(--muted); font-size: 15px; margin-top: 16px; max-width: 40ch; }
.footer-top h4 { margin: 0 0 14px; font: 500 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.footer-top ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-top ul a { color: var(--muted); text-decoration: none; font-size: 15px; }
.footer-top ul a:hover { color: var(--text); }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font: 12px/1.4 var(--mono); color: var(--faint); }