/* Seat Fill — industrial B2B one-pager
   Charcoal / steel / warm amber. No purple SaaS. */

:root {
  --bg: #0b0d0f;
  --bg-elev: #15191e;
  --bg-alt: #101317;
  --bg-deep: #080a0c;
  --border: #2a3138;
  --border-strong: #3e4852;
  --steel: #6b7680;
  --text: #e6eaee;
  --text-muted: #95a0ab;
  --accent: #e39a12;
  --accent-hot: #f0ad2a;
  --accent-dim: rgba(227, 154, 18, 0.14);
  --accent-glow: rgba(227, 154, 18, 0.08);
  --yes: #3d9a6a;
  --yes-bg: rgba(61, 154, 106, 0.09);
  --no: #c45c4a;
  --no-bg: rgba(196, 92, 74, 0.09);
  --font: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
  --radius: 8px;
  --wrap: 1040px;
  --header-h: 60px;
  --space-section: clamp(3.25rem, 6vw, 4.5rem);
  --space-block: 1.75rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #111;
  padding: 0.5rem 1rem;
  z-index: 100;
  font-weight: 600;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.wrap {
  width: min(100% - 2rem, var(--wrap));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 13, 15, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 1rem;
  position: relative;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
  z-index: 2;
}

.logo:hover {
  text-decoration: none;
  color: var(--text);
}

.logo-mark {
  width: 11px;
  height: 11px;
  background: var(--accent);
  clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
  flex-shrink: 0;
  box-shadow: 0 0 10px var(--accent-dim);
}

.nav-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.nav-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--bg-elev);
  cursor: pointer;
  z-index: 2;
}

.nav-toggle-btn:hover {
  border-color: var(--steel);
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  position: relative;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.nav-toggle:checked + .nav-toggle-btn .nav-toggle-bars {
  background: transparent;
}

.nav-toggle:checked + .nav-toggle-btn .nav-toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle:checked + .nav-toggle-btn .nav-toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.header-nav {
  display: none;
  align-items: center;
  gap: 1.35rem;
}

.header-nav a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.header-nav a:hover {
  color: var(--text);
}

.header-nav .btn {
  margin-left: 0.25rem;
}

/* Mobile nav panel */
@media (max-width: 767px) {
  .nav-toggle:checked ~ .header-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: calc(var(--header-h) + 1px);
    left: 50%;
    transform: translateX(-50%);
    width: min(100vw - 2rem, var(--wrap));
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem;
    gap: 0.15rem;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  }

  .header-nav a {
    padding: 0.7rem 0.85rem;
    border-radius: 6px;
    font-size: 0.95rem;
  }

  .header-nav a:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .header-nav .btn {
    margin: 0.35rem 0 0;
    width: 100%;
  }
}

@media (min-width: 768px) {
  .nav-toggle-btn {
    display: none;
  }

  .header-nav {
    display: flex;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  border-radius: 6px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-sm {
  padding: 0.42rem 0.8rem;
  font-size: 0.84rem;
}

.btn-lg {
  padding: 0.9rem 1.4rem;
  font-size: 1.05rem;
}

.btn-primary {
  background: var(--accent);
  color: #111;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hot);
  border-color: var(--accent-hot);
  color: #111;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--steel);
  background: var(--bg-elev);
  color: var(--text);
}

/* Hero */
.hero {
  padding: clamp(2.75rem, 5vw, 4rem) 0 2.75rem;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(ellipse 70% 45% at 30% -10%, var(--accent-glow), transparent 55%),
    linear-gradient(180deg, rgba(21, 25, 30, 0.65) 0%, transparent 70%),
    var(--bg);
}

.hero-inner {
  max-width: 680px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.85rem;
}

.hero h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(2.35rem, 5.8vw, 3.5rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.025em;
}

.accent {
  color: var(--accent);
}

.tagline {
  margin: 0 0 1.1rem;
  font-size: clamp(1.1rem, 2.4vw, 1.3rem);
  font-weight: 500;
  color: var(--text);
  line-height: 1.35;
}

.lede {
  margin: 0 0 1.6rem;
  color: var(--text-muted);
  font-size: 1.02rem;
  max-width: 36rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.75rem;
}

.proof-strip {
  list-style: none;
  margin: 0;
  padding: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.75rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.92rem;
}

.proof-strip strong {
  color: var(--text);
  font-weight: 600;
}

/* Sections */
.section {
  padding: var(--space-section) 0;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section-head {
  max-width: 620px;
  margin-bottom: var(--space-block);
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.55rem, 3.2vw, 2.05rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.022em;
}

.section-lede {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.55;
}

/* Fit split */
.split {
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 700px) {
  .split {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.3rem;
}

.card h3 {
  margin: 0 0 0.9rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-yes {
  border-color: rgba(61, 154, 106, 0.32);
  background: linear-gradient(175deg, var(--yes-bg), var(--bg-elev) 55%);
}

.card-no {
  border-color: rgba(196, 92, 74, 0.32);
  background: linear-gradient(175deg, var(--no-bg), var(--bg-elev) 55%);
}

.card-no em {
  font-style: normal;
  color: var(--no);
}

.check-list,
.x-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li,
.x-list li {
  position: relative;
  padding: 0.38rem 0 0.38rem 1.55rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-size: 0.98rem;
}

.check-list li:last-child,
.x-list li:last-child {
  border-bottom: none;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--yes);
  font-weight: 700;
}

.x-list li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: var(--no);
  font-weight: 700;
}

.card-note {
  margin: 0.9rem 0 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 800px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
}

.step {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.step-num {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.step h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.5;
}

/* Fee */
.fee-panel {
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elev);
}

@media (min-width: 720px) {
  .fee-panel {
    grid-template-columns: 1fr 1.25fr;
  }
}

.fee-hero {
  padding: 1.85rem 1.6rem;
  background:
    linear-gradient(155deg, var(--accent-dim), transparent 50%),
    #12161a;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@media (min-width: 720px) {
  .fee-hero {
    border-bottom: none;
    border-right: 1px solid var(--border);
  }
}

.fee-label {
  margin: 0 0 0.45rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.fee-amount {
  margin: 0;
  font-size: clamp(2.6rem, 5.5vw, 3.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--accent);
}

.fee-sub {
  margin: 0.7rem 0 0;
  font-weight: 600;
  font-size: 1.02rem;
}

.fee-terms {
  list-style: none;
  margin: 0;
  padding: 0;
}

.fee-terms li {
  padding: 1.05rem 1.4rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.fee-terms li:last-child {
  border-bottom: none;
}

.fee-terms strong {
  font-weight: 600;
  font-size: 0.98rem;
}

.fee-terms span {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-width: 720px;
}

.faq-item {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.2rem;
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text);
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-item p {
  margin: 0;
  padding: 0 1.2rem 1.1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  border-top: 1px solid transparent;
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.faq-item[open] p {
  padding-top: 0.95rem;
}

/* CTA */
.cta-section {
  background:
    radial-gradient(ellipse 65% 70% at 50% 110%, var(--accent-glow), transparent 50%),
    var(--bg);
  border-top: 1px solid var(--border);
  text-align: center;
}

.cta-inner {
  max-width: 540px;
}

.cta-section .eyebrow {
  margin-bottom: 0.65rem;
}

.cta-section h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.65rem, 3.8vw, 2.15rem);
  letter-spacing: -0.022em;
  line-height: 1.15;
}

.cta-section .section-lede {
  margin-bottom: 1.6rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  margin-bottom: 1.15rem;
}

.cta-fine {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 0 2.15rem;
  background: var(--bg-deep);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

@media (min-width: 600px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-brand {
  margin: 0 0 0.2rem;
  font-weight: 700;
  font-size: 0.95rem;
}

.footer-tag {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-meta {
  font-size: 0.88rem;
}

.footer-meta p {
  margin: 0 0 0.3rem;
}

.footer-meta a {
  color: var(--text-muted);
}

.footer-meta a:hover {
  color: var(--accent);
}

.legal {
  margin-top: 0.7rem !important;
  color: var(--steel);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .nav-toggle-bars,
  .nav-toggle-bars::before,
  .nav-toggle-bars::after {
    transition: none;
  }
}