:root {
  --navy-950: #071525;
  --navy-900: #0b1f38;
  --navy-800: #123056;
  --navy-700: #1a3f6d;
  --blue-600: #2a5f9e;
  --orange-500: #e87722;
  --orange-600: #d06618;
  --orange-soft: rgba(232, 119, 34, 0.14);
  --ink: #122033;
  --ink-soft: #3b4d63;
  --muted: #5f7288;
  --line: #d7e0ea;
  --bg: #f5f8fb;
  --bg-card: #ffffff;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(7, 21, 37, 0.08);
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-display: "IBM Plex Sans", "Segoe UI", sans-serif;
  --container: 1120px;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

p { margin: 0 0 1rem; }
ul { margin: 0; padding: 0; }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--orange-500);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 1000;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, var(--navy-800), var(--navy-950)),
    var(--navy-900);
  position: relative;
  flex: 0 0 auto;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 2px solid var(--orange-500);
  border-radius: 3px;
  border-left-width: 3px;
  transform: skewX(-8deg);
}

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

.brand-name {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--navy-900);
}

.brand-tag {
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.1rem;
}

.nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.94rem;
  font-weight: 500;
}

.nav a:hover,
.nav a[aria-current="page"] { color: var(--navy-900); }

.nav-cta {
  background: var(--orange-500) !important;
  color: #fff !important;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-weight: 600 !important;
}

.nav-cta:hover { background: var(--orange-600) !important; }

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  font: inherit;
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--orange-500); color: #fff; }
.btn-primary:hover { background: var(--orange-600); }
.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn-secondary-dark {
  background: #fff;
  color: var(--navy-900);
  border-color: var(--line);
}
.btn-ghost {
  background: transparent;
  color: var(--navy-900);
  border-color: var(--line);
}

.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* Hero */
.hero {
  background:
    radial-gradient(900px 420px at 85% 0%, rgba(232,119,34,0.16), transparent 55%),
    linear-gradient(160deg, var(--navy-950), var(--navy-800) 55%, #16365f);
  color: var(--white);
  padding: 4.5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 70% 40%, black 10%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  color: #f0d2b4;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  max-width: 14ch;
  margin-bottom: 1rem;
}

.hero-lede {
  color: rgba(255,255,255,0.82);
  font-size: 1.08rem;
  max-width: 38rem;
  margin-bottom: 1.6rem;
}

.hero-panel {
  background: rgba(7, 21, 37, 0.45);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px;
  padding: 1.25rem;
  min-height: 280px;
  box-shadow: var(--shadow);
}

.network-svg { width: 100%; height: auto; }

.hero-caption {
  margin-top: 0.85rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
}

/* Sections */
.section { padding: 4.25rem 0; }
.section-alt { background: #fff; border-block: 1px solid var(--line); }
.section-navy {
  background: linear-gradient(160deg, var(--navy-950), var(--navy-800));
  color: #fff;
}

.section-kicker {
  color: var(--orange-500);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.section-navy .section-kicker { color: #f0b27a; }

.section h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); max-width: 22ch; }
.section-intro {
  color: var(--muted);
  max-width: 44rem;
  margin-bottom: 2rem;
}
.section-navy .section-intro { color: rgba(255,255,255,0.75); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  box-shadow: 0 1px 0 rgba(7,21,37,0.02);
}

.card h3 { font-size: 1.15rem; margin-bottom: 0.45rem; color: var(--navy-900); }
.card p { color: var(--muted); margin-bottom: 0.85rem; }
.card a { color: var(--blue-600); font-weight: 600; text-decoration: none; }
.card a:hover { color: var(--orange-600); }

.card-dark {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.12);
}
.card-dark h3 { color: #fff; }
.card-dark p { color: rgba(255,255,255,0.72); }
.card-dark a { color: #f0b27a; }

.icon-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange-500);
  display: inline-block;
  margin-right: 0.45rem;
}

/* Lists */
.feature-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.feature-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

.feature-list li strong {
  display: block;
  color: var(--navy-900);
  margin-bottom: 0.15rem;
}

.check-list {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.check-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--ink-soft);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 2px;
  background: var(--orange-500);
}

/* Screenshot frame */
.shot {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.shot-frame {
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(180deg, #eef3f8, #dfe8f2),
    var(--bg);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.shot-meta {
  padding: 0.85rem 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Split challenge */
.challenge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.compare {
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: #fff;
}

.compare h3 { font-size: 1.05rem; }
.compare.generic h3 { color: var(--muted); }
.compare.utility {
  border-color: rgba(232,119,34,0.35);
  box-shadow: inset 0 0 0 1px var(--orange-soft);
}
.compare.utility h3 { color: var(--navy-900); }

/* CTA band */
.cta-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.75rem;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
  color: #fff;
}

.cta-band p { margin: 0.35rem 0 0; color: rgba(255,255,255,0.75); }

/* Page hero (inner) */
.page-hero {
  background: linear-gradient(160deg, var(--navy-950), var(--navy-800));
  color: #fff;
  padding: 3.5rem 0 3rem;
}

.page-hero h1 { font-size: clamp(1.9rem, 3.5vw, 2.6rem); max-width: 18ch; }
.page-hero p { color: rgba(255,255,255,0.78); max-width: 42rem; margin: 0; }

.breadcrumbs {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 1rem;
}
.breadcrumbs a { color: rgba(255,255,255,0.75); text-decoration: none; }

/* Forms */
.form {
  display: grid;
  gap: 0.9rem;
  max-width: 36rem;
}

.form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.form input,
.form select,
.form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid var(--orange-soft);
  border-color: rgba(232,119,34,0.55);
}

.form-note {
  color: #1f6b45;
  font-size: 0.92rem;
  margin: 0;
}

.contact-meta {
  margin-top: 1.5rem;
  color: var(--muted);
}
.contact-meta a { color: var(--blue-600); }

/* Tech strip */
.tech-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tech-pill {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-weight: 600;
}

/* Footer */
.site-footer {
  background: var(--navy-950);
  color: rgba(255,255,255,0.78);
  padding: 3rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.site-footer h4 {
  color: #fff;
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

.site-footer a {
  text-decoration: none;
  color: rgba(255,255,255,0.7);
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.92rem;
}

.site-footer a:hover { color: #fff; }

.footer-brand { font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}

/* Utility */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mono { font-family: ui-monospace, monospace; font-size: 0.9em; }

@media (max-width: 920px) {
  .hero-grid,
  .two-col,
  .challenge-grid,
  .card-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav-toggle { display: inline-flex; }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem 1rem;
    gap: 0.35rem;
  }

  .nav.open { display: flex; }
  .nav a { padding: 0.55rem 0.25rem; }
  .nav-cta { text-align: center; }
}