/* ============================================================
   Nixloop.ai — landing styles
   Brand tokens per BRD-NIX-001 (Clinical Green primary,
   SteamOps Cyan data/live, Inter typography, dual-mode surfaces)
   ============================================================ */

:root {
  /* brand */
  --color-brand-primary: #00A878;
  --color-brand-primary-hover: #008F68;
  --color-steamops-cyan: #00C2E8;
  --color-medical-blue: #2F80ED;
  --color-ai-indigo: #6D5DF6;
  --color-warning: #D97706;
  --color-error: #DC3545;

  /* dark surfaces (Clinical Night) */
  --dark-bg: #06111A;
  --dark-elevated: #0B1D2A;
  --dark-card: #102A3A;
  --dark-soft: #122F42;
  --dark-border: #1E3A4C;
  --dark-text: #F8FAFC;
  --dark-text-2: #A7B6C7;
  --dark-text-3: #6F8194;

  /* light surfaces (Clean Clinical) */
  --light-bg: #F8FAFC;
  --light-elevated: #FFFFFF;
  --light-soft: #F1F7FA;
  --light-border: #D6E2EA;
  --light-text: #0F172A;
  --light-text-2: #64748B;
  --light-text-3: #94A3B8;

  /* layout */
  --max: 1200px;
  --pad: clamp(20px, 4vw, 56px);
  --radius: 14px;
  --radius-sm: 9px;

  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Inter Tight", "Inter", system-ui, sans-serif;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset-ish ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--light-text);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); line-height: 1.12; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.container { max-width: var(--max); margin-inline: auto; padding-inline: var(--pad); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-brand-primary); color: #fff;
  padding: 10px 18px; border-radius: 0 0 var(--radius-sm) 0; z-index: 100;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--color-brand-primary);
  outline-offset: 2px;
}
.section-dark :focus-visible, .hero :focus-visible { outline-color: var(--color-steamops-cyan); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 15px/1 var(--font-body);
  padding: 15px 26px; border-radius: 999px;
  text-decoration: none; border: 1px solid transparent;
  cursor: pointer; transition: background-color .2s var(--ease-out), border-color .2s, color .2s, transform .2s var(--ease-out);
}
.btn-sm { padding: 10px 18px; font-size: 13.5px; }
.btn-block { width: 100%; justify-content: center; }
.btn-primary { background: var(--color-brand-primary); color: #fff; }
.btn-primary:hover { background: var(--color-brand-primary-hover); }
.btn-primary .btn-arrow { transition: transform .2s var(--ease-out); }
.btn-primary:hover .btn-arrow { transform: translateX(3px); }
.btn-secondary {
  background: transparent; color: var(--light-text);
  border-color: var(--light-border);
}
.btn-secondary:hover { border-color: var(--color-brand-primary); color: var(--color-brand-primary-hover); }
.btn-ghost-dark {
  background: transparent; color: var(--dark-text-2);
  border-color: var(--dark-border);
}
.btn-ghost-dark:hover { color: var(--dark-text); border-color: var(--dark-text-3); }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset-inline: 0; top: 0; z-index: 50;
  transition: background-color .25s, box-shadow .25s, backdrop-filter .25s;
}
.nav.scrolled {
  background: rgba(6, 17, 26, 0.82);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--dark-border);
}
.nav.on-light.scrolled {
  background: rgba(248, 250, 252, 0.85);
  box-shadow: 0 1px 0 var(--light-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-word {
  font: 700 19px/1 var(--font-display);
  letter-spacing: -0.02em; color: var(--dark-text);
}
.nav.on-light .brand-word { color: var(--light-text); }
.brand-tld { color: var(--color-steamops-cyan); font-weight: 600; }
.nav.on-light .brand-tld { color: var(--color-brand-primary); }

.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font: 500 14px/1 var(--font-body); text-decoration: none;
  color: var(--dark-text-2); transition: color .15s;
}
.nav-links a:hover { color: var(--dark-text); }
.nav.on-light .nav-links a { color: var(--light-text-2); }
.nav.on-light .nav-links a:hover { color: var(--light-text); }

.nav-actions { display: flex; align-items: center; gap: 14px; }
.lang-toggle {
  display: inline-flex; gap: 5px; align-items: center;
  background: none; border: 1px solid var(--dark-border); border-radius: 999px;
  padding: 8px 14px; cursor: pointer;
  font: 600 12.5px/1 var(--font-body); color: var(--dark-text-3);
  transition: border-color .15s;
}
.lang-toggle:hover { border-color: var(--dark-text-3); }
.nav.on-light .lang-toggle { border-color: var(--light-border); color: var(--light-text-3); }
.lang-toggle .is-active { color: var(--color-steamops-cyan); }
.nav.on-light .lang-toggle .is-active { color: var(--color-brand-primary); }
.lang-sep { opacity: .5; }

.burger { display: none; }
.mobile-menu { display: none; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(900px 480px at 82% -10%, rgba(0, 194, 232, 0.10), transparent 65%),
    radial-gradient(700px 420px at 8% 110%, rgba(0, 168, 120, 0.12), transparent 60%),
    var(--dark-bg);
  color: var(--dark-text);
  padding: clamp(120px, 16vh, 170px) 0 clamp(48px, 7vh, 84px);
  overflow: hidden;
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 72px); align-items: center;
}
.hero-powered {
  font: 500 13px/1 var(--font-body); color: var(--dark-text-3);
  margin-bottom: 22px; letter-spacing: 0.02em;
}
.hero-powered a { color: var(--dark-text-2); text-decoration: none; border-bottom: 1px solid var(--dark-border); }
.hero-powered a:hover { color: var(--color-steamops-cyan); }
.hero-title {
  font-size: clamp(38px, 5.4vw, 66px);
  font-weight: 700; letter-spacing: -0.035em;
  margin-bottom: 24px;
}
.hero-title-accent {
  background: linear-gradient(92deg, var(--color-brand-primary), var(--color-steamops-cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: clamp(16px, 1.6vw, 18.5px); color: var(--dark-text-2);
  max-width: 54ch; margin-bottom: 34px;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 20px; }
.hero-note { font: 500 13.5px/1.5 var(--font-body); color: var(--dark-text-3); max-width: 46ch; }

/* staggered load-in */
.hero-copy > * { animation: rise .7s var(--ease-out) both; }
.hero-copy > *:nth-child(1) { animation-delay: .05s; }
.hero-copy > *:nth-child(2) { animation-delay: .12s; }
.hero-copy > *:nth-child(3) { animation-delay: .22s; }
.hero-copy > *:nth-child(4) { animation-delay: .32s; }
.hero-copy > *:nth-child(5) { animation-delay: .42s; }
.hero-demo { animation: rise .8s var(--ease-out) .3s both; }
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

/* call card */
.call-card {
  background: linear-gradient(180deg, var(--dark-card), var(--dark-elevated));
  border: 1px solid var(--dark-border);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}
.call-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--dark-border);
  font: 600 13px/1 var(--font-body); color: var(--dark-text-2);
}
.live-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-steamops-cyan);
  box-shadow: 0 0 0 0 rgba(0, 194, 232, 0.5);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 194, 232, 0.45); }
  70% { box-shadow: 0 0 0 9px rgba(0, 194, 232, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 194, 232, 0); }
}
.call-timer { margin-left: auto; font-variant-numeric: tabular-nums; color: var(--dark-text-3); }
/* All messages are pre-rendered hidden so the card sits at its final size
   from the start; playback only flips visibility, so layout never moves. */
.call-body {
  padding: 18px; min-height: 220px;
  display: flex; flex-direction: column; gap: 10px;
}
.bubble {
  position: relative;
  max-width: 82%;
  padding: 10px 14px; border-radius: 14px;
  font-size: 14px; line-height: 1.45;
  opacity: 0.09; /* ghosted placeholder: the structure is visible before reveal */
  transition: color .25s ease, opacity .35s ease;
}
.bubble.show, .bubble.show-quiet, .bubble.typing-state, .sys-chip.show { opacity: 1; }
.bubble.typing-state { color: transparent; }
.bubble.typing-state::after {
  content: "· · ·";
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  color: var(--dark-text-3); font-weight: 700; letter-spacing: 3px;
  animation: blink 1.2s infinite;
}
.bubble-bot {
  align-self: flex-start;
  background: var(--dark-soft); color: var(--dark-text);
  border: 1px solid var(--dark-border);
  border-bottom-left-radius: 4px;
}
.bubble-caller {
  align-self: flex-end;
  background: rgba(0, 168, 120, 0.16); color: #d9f5ec;
  border: 1px solid rgba(0, 168, 120, 0.35);
  border-bottom-right-radius: 4px;
}
@keyframes blink { 0%, 60%, 100% { opacity: .25; } 30% { opacity: 1; } }

.sys-chip {
  align-self: center;
  display: inline-flex; align-items: center; gap: 7px;
  font: 600 11.5px/1 ui-monospace, "Cascadia Code", Consolas, monospace;
  letter-spacing: 0.01em;
  color: var(--color-steamops-cyan);
  background: rgba(0, 194, 232, 0.08);
  border: 1px solid rgba(0, 194, 232, 0.25);
  border-radius: 999px; padding: 6px 12px;
  opacity: 0.09;
  transition: opacity .35s ease;
}
.sys-chip::before { content: "▸"; font-size: 9px; }
.sys-chip.ok { color: #4ade9d; background: rgba(0, 168, 120, 0.1); border-color: rgba(0, 168, 120, 0.3); }

.call-foot {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 18px; border-top: 1px solid var(--dark-border);
}
.call-waveform { display: inline-flex; align-items: center; gap: 3px; height: 18px; }
.call-waveform i {
  width: 3px; border-radius: 2px; background: var(--color-steamops-cyan);
  height: 30%; opacity: .8;
  animation: wave 1.1s ease-in-out infinite;
}
.call-waveform i:nth-child(2n) { animation-delay: .15s; }
.call-waveform i:nth-child(3n) { animation-delay: .3s; }
.call-waveform i:nth-child(4n) { animation-delay: .45s; }
@keyframes wave { 0%, 100% { height: 25%; } 50% { height: 95%; } }
.call-replay {
  background: none; border: 1px solid var(--dark-border); border-radius: 999px;
  color: var(--dark-text-3); font: 600 12px/1 var(--font-body);
  padding: 7px 14px; cursor: pointer; transition: color .15s, border-color .15s;
}
.call-replay:hover { color: var(--dark-text); border-color: var(--dark-text-3); }
.call-disclaimer {
  margin-top: 12px; text-align: right;
  font: 400 12px/1.4 var(--font-body); color: var(--dark-text-3);
}

.hero-ecg { position: absolute; bottom: -2px; left: 0; right: 0; pointer-events: none; }
.hero-ecg svg { display: block; width: 100%; height: 56px; }
#ecgPath {
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  animation: ecgDraw 3s var(--ease-out) 0.7s forwards;
}
@keyframes ecgDraw { to { stroke-dashoffset: 0; } }

/* ---------- shared section scaffolding ---------- */
section { padding: clamp(64px, 10vh, 118px) 0; }
.section-light { background: var(--light-bg); color: var(--light-text); }
.section-soft { background: var(--light-soft); color: var(--light-text); }
.section-dark { background: var(--dark-bg); color: var(--dark-text); }

.section-head { max-width: 720px; margin-bottom: clamp(36px, 6vh, 64px); }
.section-title {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700; letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.section-lede { font-size: clamp(15.5px, 1.5vw, 17.5px); color: var(--light-text-2); }
.section-dark .section-lede { color: var(--dark-text-2); }

/* scroll reveal */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s var(--ease-out), transform .65s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- how / loop stages ---------- */
.loop-stages { display: flex; flex-direction: column; gap: clamp(36px, 6vh, 64px); }
.stage {
  display: grid;
  grid-template-columns: 64px minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: clamp(18px, 3vw, 44px);
  align-items: start;
}
.stage:nth-child(even) { grid-template-columns: 64px minmax(0, 0.8fr) minmax(0, 1.2fr); }
.stage:nth-child(even) .stage-body { order: 3; }
.stage:nth-child(even) .stage-visual { order: 2; }

.stage-marker { display: flex; flex-direction: column; align-items: center; gap: 12px; height: 100%; }
.stage-num {
  display: grid; place-items: center;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--light-elevated);
  border: 1.5px solid var(--color-brand-primary);
  color: var(--color-brand-primary-hover);
  font: 700 16px/1 var(--font-display);
}
.stage-line { flex: 1; width: 1.5px; background: linear-gradient(var(--light-border), transparent); }
.stage:last-child .stage-line { display: none; }

.stage-body h3 {
  font-size: clamp(20px, 2.2vw, 26px); letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.stage-body p { color: var(--light-text-2); max-width: 52ch; }
.stage-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 18px 0 0; }
.stage-tags li {
  font: 600 12.5px/1 var(--font-body);
  color: var(--color-brand-primary-hover);
  background: rgba(0, 168, 120, 0.08);
  border: 1px solid rgba(0, 168, 120, 0.22);
  padding: 7px 12px; border-radius: 999px;
}

.mini-panel {
  background: var(--light-elevated);
  border: 1px solid var(--light-border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 14px 36px -24px rgba(15, 23, 42, 0.25);
}
.mini-panel-title {
  font: 600 12px/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--light-text-3); margin-bottom: 14px;
}
.mini-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 9px 0; border-bottom: 1px dashed var(--light-border);
  font-size: 13.5px;
}
.mini-row:last-of-type { border-bottom: 0; }
.mini-label { color: var(--light-text); font-weight: 500; }
.mini-badge {
  font: 600 11px/1 var(--font-body); padding: 5px 10px; border-radius: 999px;
}
.mini-badge.ok { color: var(--color-brand-primary-hover); background: rgba(0, 168, 120, 0.1); }
.mini-badge.pending { color: var(--color-warning); background: rgba(217, 119, 6, 0.1); }
.mini-badge.info { color: var(--color-medical-blue); background: rgba(47, 128, 237, 0.1); }
.mini-badge.neutral { color: var(--light-text-3); background: var(--light-soft); }
.mini-meter {
  display: flex; align-items: center; gap: 10px; margin-top: 14px;
  font: 600 12px/1 var(--font-body); color: var(--light-text-3);
}
.mini-meter-bar {
  flex: 1; height: 6px; border-radius: 3px; background: var(--light-soft);
  overflow: hidden; display: block;
}
.mini-meter-bar b {
  display: block; height: 100%; width: 86%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--color-brand-primary), var(--color-steamops-cyan));
  transition: width 1s var(--ease-out) .3s;
}
.api-chip {
  font: 600 12.5px/1 ui-monospace, "Cascadia Code", Consolas, monospace;
  color: var(--color-medical-blue);
  background: rgba(47, 128, 237, 0.07);
  border: 1px solid rgba(47, 128, 237, 0.18);
  border-radius: var(--radius-sm);
  padding: 9px 12px; margin-bottom: 8px;
}
.api-chip:last-child { margin-bottom: 0; }

/* ---------- capabilities ---------- */
.cap-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(28px, 4vw, 56px); align-items: start;
}
.cap-feature {
  background: var(--dark-bg); color: var(--dark-text);
  border-radius: var(--radius);
  padding: clamp(24px, 3vw, 40px);
  position: sticky; top: 96px;
}
.cap-feature h3 { font-size: clamp(20px, 2.2vw, 26px); letter-spacing: -0.02em; margin-bottom: 12px; }
.cap-feature > p { color: var(--dark-text-2); }
.cap-modes { display: flex; flex-direction: column; gap: 10px; margin-top: 22px; }
.cap-mode {
  display: flex; flex-direction: column; gap: 3px;
  border-left: 2px solid var(--color-steamops-cyan);
  padding: 8px 0 8px 16px;
}
.cap-mode-name { font: 600 15px/1.3 var(--font-body); color: var(--dark-text); }
.cap-mode-desc { font-size: 13px; color: var(--dark-text-3); }

.cap-list { list-style: none; margin: 0; padding: 0; }
.cap-list li {
  display: flex; flex-direction: column; gap: 3px;
  padding: 16px 0; border-bottom: 1px dashed var(--light-border);
}
.cap-list li:first-child { padding-top: 4px; }
.cap-list strong { font: 600 16px/1.35 var(--font-body); color: var(--light-text); }
.cap-list span { font-size: 14px; color: var(--light-text-2); }

/* ---------- safeguards ---------- */
.safeguards {
  background:
    radial-gradient(720px 400px at 90% 0%, rgba(0, 168, 120, 0.07), transparent 60%),
    var(--dark-bg);
}
.safe-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px; background: var(--dark-border);
  border: 1px solid var(--dark-border); border-radius: var(--radius);
  overflow: hidden;
}
.safe-item { background: var(--dark-elevated); padding: clamp(20px, 2.6vw, 32px); }
.safe-item h3 { font-size: 17px; letter-spacing: -0.01em; margin-bottom: 10px; color: var(--dark-text); }
.safe-item p { font-size: 14px; color: var(--dark-text-2); }
.safe-note {
  margin-top: 26px; font-size: 13.5px; color: var(--dark-text-3); max-width: 70ch;
}

/* ---------- integrations ---------- */
.int-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 72px); align-items: center;
}
.int-copy p { color: var(--light-text-2); max-width: 56ch; }
.int-copy .section-title { margin-bottom: 18px; }
.int-copy .btn { margin-top: 10px; }

.int-diagram {
  background: var(--light-elevated);
  border: 1px solid var(--light-border); border-radius: var(--radius);
  padding: clamp(24px, 3vw, 40px);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  box-shadow: 0 14px 36px -24px rgba(15, 23, 42, 0.25);
}
.int-node {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--light-border); border-radius: var(--radius-sm);
  padding: 14px 22px; font: 600 15px/1 var(--font-body);
}
.int-node-bot { background: var(--dark-bg); color: var(--dark-text); border-color: var(--dark-border); }
.int-wire {
  width: 2px; height: 72px; position: relative;
  background: linear-gradient(var(--color-steamops-cyan), var(--color-medical-blue));
  opacity: .5;
}
.int-packet {
  position: absolute; left: 50%; top: 0;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-steamops-cyan);
  transform: translateX(-50%);
  animation: packet 2.2s linear infinite;
}
@keyframes packet {
  0% { top: 0; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: calc(100% - 8px); opacity: 0; }
}
.int-node-pm { gap: 12px; }
.int-pm-name { letter-spacing: -0.01em; }
.int-pm-tag {
  font: 700 10.5px/1 var(--font-body); text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-brand-primary-hover); background: rgba(0, 168, 120, 0.1);
  padding: 5px 9px; border-radius: 999px;
}
.int-others { margin-top: 14px; font: 500 13px/1 var(--font-body); color: var(--light-text-3); }
.int-others span { border-bottom: 1px dashed var(--light-border); padding-bottom: 3px; }

/* ---------- onboarding ---------- */
.onb-steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px) clamp(24px, 3vw, 48px);
  counter-reset: none;
}
.onb-steps li { display: flex; gap: 16px; align-items: baseline; }
.onb-num {
  font: 700 clamp(28px, 3vw, 38px)/1 var(--font-display);
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-brand-primary), var(--color-steamops-cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  flex-shrink: 0;
}
.onb-steps strong { display: block; font: 600 16px/1.4 var(--font-body); color: var(--light-text); }
.onb-steps div span { font-size: 13.5px; color: var(--light-text-2); }

/* ---------- contact ---------- */
.contact-grid {
  display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(32px, 5vw, 72px); align-items: start;
}
.contact-copy .section-title { margin-bottom: 18px; }
.contact-copy > p { color: var(--light-text-2); max-width: 50ch; }
.contact-points { list-style: none; margin: 24px 0 0; padding: 0; }
.contact-points li {
  position: relative; padding: 10px 0 10px 30px;
  border-bottom: 1px dashed var(--light-border);
  font-size: 15px; color: var(--light-text);
}
.contact-points li::before {
  content: ""; position: absolute; left: 2px; top: 17px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--color-brand-primary);
  border-bottom: 2px solid var(--color-brand-primary);
  transform: rotate(-48deg); border-radius: 1px;
}
.contact-powered { margin-top: 28px; font: 500 13.5px/1 var(--font-body); color: var(--light-text-3); }
.contact-powered a { color: var(--light-text-2); text-decoration: none; border-bottom: 1px solid var(--light-border); }
.contact-powered a:hover { color: var(--color-brand-primary-hover); }

.contact-form {
  background: var(--light-elevated);
  border: 1px solid var(--light-border); border-radius: var(--radius);
  padding: clamp(22px, 3vw, 36px);
  box-shadow: 0 18px 44px -28px rgba(15, 23, 42, 0.3);
}
.hp { position: absolute; left: -9999px; }
.form-row { margin-bottom: 16px; }
.form-row label {
  display: block; font: 600 13px/1 var(--font-body);
  color: var(--light-text); margin-bottom: 7px;
}
.form-row input, .form-row select, .form-row textarea {
  width: 100%; font: 400 15px/1.4 var(--font-body); color: var(--light-text);
  background: var(--light-bg);
  border: 1px solid var(--light-border); border-radius: var(--radius-sm);
  padding: 11px 13px;
  transition: border-color .15s, box-shadow .15s;
}
.form-row textarea { resize: vertical; }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--color-brand-primary);
  box-shadow: 0 0 0 3px rgba(0, 168, 120, 0.14);
}
.form-status { min-height: 1.2em; margin-top: 12px; font: 500 13.5px/1.4 var(--font-body); }
.form-status.ok { color: var(--color-brand-primary-hover); }
.form-status.err { color: var(--color-error); }

/* ---------- footer ---------- */
.footer { padding: 44px 0; }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer .brand-word { font-size: 17px; }
.footer-tag { font-size: 12.5px; color: var(--dark-text-3); margin: 3px 0 0; }
.footer-tag a { color: var(--dark-text-2); text-decoration: none; }
.footer-tag a:hover { color: var(--color-steamops-cyan); }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a {
  font: 500 13.5px/1 var(--font-body); color: var(--dark-text-2);
  text-decoration: none;
}
.footer-links a:hover { color: var(--dark-text); }
.footer-copy { font-size: 12.5px; color: var(--dark-text-3); margin: 0; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero-grid, .int-grid, .contact-grid { grid-template-columns: 1fr; }
  .cap-layout { grid-template-columns: 1fr; }
  .cap-feature { position: static; }
  .safe-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .onb-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stage, .stage:nth-child(even) { grid-template-columns: 44px minmax(0, 1fr); }
  .stage-visual { grid-column: 2; order: 3 !important; max-width: 420px; }
  .stage:nth-child(even) .stage-body { order: 2; }
  .nav-links { display: none; }
  .nav .btn-sm { display: none; }
  .burger {
    display: inline-flex; flex-direction: column; gap: 5px;
    background: none; border: 0; cursor: pointer; padding: 8px;
  }
  .burger span {
    width: 20px; height: 2px; border-radius: 1px;
    background: var(--dark-text); transition: transform .2s, opacity .2s;
  }
  .nav.on-light .burger span { background: var(--light-text); }
  .burger[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .burger[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .mobile-menu {
    display: flex; flex-direction: column;
    background: var(--dark-elevated);
    border-top: 1px solid var(--dark-border);
    padding: 10px var(--pad) 18px;
  }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu a {
    padding: 13px 0; text-decoration: none;
    font: 500 15px/1 var(--font-body); color: var(--dark-text-2);
    border-bottom: 1px dashed var(--dark-border);
  }
  .mobile-menu a:last-child { border-bottom: 0; }
  .mobile-cta { color: var(--color-steamops-cyan) !important; font-weight: 600 !important; }
}
@media (max-width: 560px) {
  .safe-grid { grid-template-columns: 1fr; }
  .onb-steps { grid-template-columns: 1fr; }
  .hero { padding-top: 104px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 404 page ---------- */
.nf-wrap {
  min-height: 100vh;
  display: grid; place-items: center;
  background:
    radial-gradient(700px 420px at 80% 0%, rgba(0, 194, 232, 0.08), transparent 60%),
    var(--dark-bg);
  color: var(--dark-text);
  text-align: center;
  padding: var(--pad);
}
.nf-card { max-width: 480px; }
.nf-card img { margin: 0 auto 26px; }
.nf-code {
  font: 700 15px/1 var(--font-body);
  letter-spacing: 0.14em;
  color: var(--color-steamops-cyan);
  margin: 0 0 14px;
}
.nf-card h1 {
  font-size: clamp(26px, 5vw, 36px);
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}
.nf-card p { color: var(--dark-text-2); margin-bottom: 30px; }
.nf-es { font-size: 14px; color: var(--dark-text-3); margin-top: 18px; }
.nf-es a { color: inherit; }