/* OBD Datalog Viewer — satellite marketing (lab notebook / signal / chamfer panels) */
:root {
  --ink: #1a2332;
  --ink-soft: #2e3c4d;
  --muted: #5c6b7a;
  --paper: #f3f6f8;
  --paper-2: #e8eef2;
  --line: #c5d0da;
  --steel: #2f4a63;
  --steel-deep: #1e3348;
  --signal: #2f9e6b;
  --signal-bright: #3ecf8e;
  --amber: #c9852a;
  --white: #ffffff;
  --radius-btn: 7px;
  --chamfer: 12px;
  --font-sans: "Source Sans 3", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1120px;
  --header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.55;
  background:
    linear-gradient(180deg, rgba(243, 246, 248, 0.92), rgba(232, 238, 242, 0.96)),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 23px,
      rgba(47, 74, 99, 0.04) 23px,
      rgba(47, 74, 99, 0.04) 24px
    ),
    var(--paper);
  min-height: 100vh;
}

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

a {
  color: var(--steel);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--signal);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--steel-deep);
  color: var(--white);
  padding: 0.5rem 1rem;
  z-index: 100;
}

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

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

/* Cut-corner panels (lab / instrument — not soft SaaS pills) */
.panel-chamfer,
.feature-block,
.plan-card,
.step,
.faq-item,
.trust-item,
.local-first-band,
.notice,
.callout {
  --c: var(--chamfer);
  clip-path: polygon(
    var(--c) 0,
    100% 0,
    100% calc(100% - var(--c)),
    calc(100% - var(--c)) 100%,
    0 100%,
    0 var(--c)
  );
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: rgba(243, 246, 248, 0.9);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-block: 0.65rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 auto;
  display: block;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  margin-left: auto;
}

.nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  padding-bottom: 0.1rem;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--steel-deep);
  border-bottom-color: var(--signal);
}

.header-cta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Buttons — slight radius, not pills */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.05rem;
  border: 1px solid var(--steel);
  border-radius: var(--radius-btn);
  background: var(--white);
  color: var(--steel-deep);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.button:hover {
  transform: translateY(-1px);
  color: var(--steel-deep);
  border-color: var(--signal);
}

.button.primary {
  background: var(--steel-deep);
  border-color: var(--steel-deep);
  color: var(--white);
}

.button.primary:hover {
  background: var(--steel);
  border-color: var(--steel);
  color: var(--white);
}

.button.signal {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--white);
}

.button.signal:hover {
  background: #278a5c;
  border-color: #278a5c;
  color: var(--white);
}

.button.ghost {
  background: transparent;
}

/* ICE = amber (engine/warm); Hybrid = signal green (EV/HV) */
.button.demo-ice {
  border-color: var(--amber);
  color: #8a5a12;
  background: var(--white);
}

.button.demo-ice:hover {
  border-color: #a86e1f;
  color: #6e480e;
  background: #fffaf2;
}

.button.demo-hybrid,
.button.demo-hybrid.signal {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--white);
}

.button.demo-hybrid:hover,
.button.demo-hybrid.signal:hover {
  background: #278a5c;
  border-color: #278a5c;
  color: var(--white);
}

.text-link {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 500;
  align-self: center;
  text-decoration: none;
  color: var(--steel);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.text-link:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.hero-cta,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 1.15rem;
}

/* Hero — compact, shared container grid */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  padding: 2.25rem 0 2rem;
  background:
    radial-gradient(ellipse 70% 55% at 78% 35%, rgba(62, 207, 142, 0.13), transparent 58%),
    radial-gradient(ellipse 45% 50% at 12% 85%, rgba(201, 133, 42, 0.08), transparent 55%),
    linear-gradient(120deg, #dfe8ef 0%, #f3f6f8 48%, #e4edf3 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.3;
  pointer-events: none;
  background-image: url("/assets/img/signal-grid.svg");
  background-size: cover;
  background-position: center;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 2rem 2.5rem;
  align-items: center;
  animation: heroText 0.7s ease both;
}

.hero-copy {
  min-width: 0;
}

.hero-media {
  min-width: 0;
  animation: heroIn 0.85s ease both;
}

.hero-media img {
  width: 100%;
  clip-path: polygon(
    12px 0,
    100% 0,
    100% calc(100% - 12px),
    calc(100% - 12px) 100%,
    0 100%,
    0 12px
  );
  box-shadow: 0 16px 36px rgba(30, 51, 72, 0.12);
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes heroText {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 0.7rem;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--steel-deep);
}

h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3.6vw, 2.45rem);
  font-weight: 600;
  margin: 0 0 0.75rem;
  max-width: 16ch;
}

h2 {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  margin: 0 0 0.6rem;
}

h3 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.lead {
  font-size: 1.12rem;
  color: var(--ink-soft);
  margin: 0;
  max-width: 40ch;
}

.local-first-band,
.notice,
.callout {
  margin-top: 1.1rem;
  padding: 0.85rem 1rem;
  border: none;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: inset 3px 0 0 var(--signal);
}

.notice {
  box-shadow: inset 3px 0 0 var(--amber);
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.callout strong,
.local-first-band strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  color: var(--steel-deep);
}

/* Sections */
.section {
  padding: 2.75rem 0;
}

.section.section--tight {
  padding-top: 1.75rem;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 48rem;
  margin-bottom: 1.5rem;
}

.section-head p {
  color: var(--ink-soft);
  margin: 0;
}

.grid-3,
.grid-2,
.grid-4,
.grid-featured {
  display: grid;
  gap: 1.1rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.grid-featured {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 1.1rem;
}

.grid-secondary {
  grid-template-columns: repeat(3, 1fr);
  opacity: 0.98;
}

.feature-block,
.plan-card,
.step,
.faq-item {
  background: rgba(255, 255, 255, 0.9);
  border: none;
  padding: 1.2rem 1.25rem;
  box-shadow: inset 0 0 0 1px var(--line);
}

.feature-block p,
.plan-card p,
.step p {
  margin: 0;
  color: var(--ink-soft);
}

.feature-block--emphasis {
  box-shadow:
    inset 0 0 0 1px rgba(47, 158, 107, 0.45),
    inset 3px 0 0 var(--signal);
}

.feature-block .code,
.plan-card .badge,
.step .n {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--signal);
}

.plan-card .badge {
  display: inline-block;
  margin-bottom: 0.45rem;
  color: var(--steel);
}

.plan-card ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.plan-card li + li {
  margin-top: 0.3rem;
}

.plan-card h3 {
  font-family: var(--font-mono);
}

.plan-card--featured {
  box-shadow:
    inset 0 0 0 1px rgba(47, 74, 99, 0.55),
    inset 3px 0 0 var(--steel-deep);
  background: rgba(255, 255, 255, 0.98);
}

.plan-card--featured .badge {
  color: var(--signal);
}

/* Trust strip — same weight as body panels */
.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
}

.trust-item {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.35;
  padding: 0.95rem 1rem;
  background: rgba(255, 255, 255, 0.92);
  color: var(--steel-deep);
  box-shadow: inset 0 0 0 1px var(--line);
}

.trust-item .n {
  flex: 0 0 auto;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--signal);
  margin-top: 0.15rem;
}

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.keyword-cloud span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.28rem 0.5rem;
  background: var(--white);
  color: var(--muted);
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.bridge-band {
  background: linear-gradient(105deg, var(--steel-deep), var(--steel));
  color: #e8f0f6;
  padding: 2.25rem 0;
}

.bridge-band h2,
.bridge-band a {
  color: #fff;
}

.bridge-band p {
  color: rgba(232, 240, 246, 0.88);
  max-width: 48ch;
}

.bridge-band .button {
  background: var(--signal);
  border-color: var(--signal);
  color: #fff;
}

.bridge-band .button.ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.faq-item + .faq-item {
  margin-top: 0.65rem;
}

.faq-item summary {
  font-family: var(--font-mono);
  font-weight: 500;
  cursor: pointer;
}

.faq-item p {
  margin: 0.65rem 0 0;
  color: var(--ink-soft);
}

.page-hero {
  padding: 1.85rem 0 1.35rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(ellipse 60% 80% at 90% 0%, rgba(62, 207, 142, 0.12), transparent 60%);
}

.page-hero .lead {
  margin-top: 0.5rem;
}

.page-hero .hero-cta,
.page-hero .cta-row {
  margin-top: 1rem;
}

.prose {
  max-width: 62ch;
}

.prose p {
  color: var(--ink-soft);
}

.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

/* Reveal motion */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #e4ebf0;
  padding: 2.5rem 0 1.75rem;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 1.5rem;
}

.footer-grid a {
  display: block;
  margin-top: 0.35rem;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.footer-grid a:hover {
  color: var(--signal);
}

.footer-brand {
  font-family: var(--font-mono);
}

.footer-lead {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0.5rem 0 0;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--muted);
}

@media (max-width: 960px) {
  .grid-featured,
  .grid-secondary {
    grid-template-columns: 1fr 1fr;
  }

  .trust-strip {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .header-cta {
    margin-left: auto;
  }

  .hero {
    padding: 1.5rem 0 1.75rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 1.35rem;
  }

  .hero-media {
    order: 2;
  }

  .hero-copy {
    order: 1;
  }

  .hero-media img {
    max-width: 100%;
    opacity: 0.95;
  }

  h1 {
    max-width: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .trust-strip,
  .grid-featured,
  .grid-secondary {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .header-cta .button.ghost {
    display: none;
  }
}

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

  .hero-media,
  .hero-grid,
  [data-reveal] {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}