/* Vertex Ola International Resources Limited
   Shared stylesheet
   Design: convergence motif, engineering-grade precision
   Palette: cool paper, cool ink, deep teal accent, mono metadata */

:root {
  --paper: #F3F3EF;
  --surface: #FFFFFF;
  --ink: #14181E;
  --ink-soft: #5A626C;
  --ink-faint: #8A9099;
  --accent: #0E7C6B;
  --accent-deep: #0A5C50;
  --accent-tint: #E5F0EC;
  --line: #DFE0DA;
  --line-strong: #CBCDC4;
  --max: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 14px;
  --font-display: "Space Grotesk", "IBM Plex Sans", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 0 0 1.1rem;
}

.eyebrow .dot { color: var(--ink-faint); margin: 0 0.5em; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

p { margin: 0 0 1.1rem; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  text-decoration: none;
  color: var(--ink);
}

.brand .mark { width: 26px; height: 26px; }

.brand .wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.brand .wordmark .thin { color: var(--ink-faint); font-weight: 500; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.94rem;
  color: var(--ink-soft);
  transition: color 0.18s ease;
}

.nav-links a:hover { color: var(--ink); }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.82rem !important;
  letter-spacing: 0.02em;
  color: var(--accent-deep) !important;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.5rem 0.95rem;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.nav-cta:hover { border-color: var(--accent); background: var(--accent-tint); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  width: 42px;
  height: 38px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 1.6px;
  background: var(--ink);
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- Hero ---------- */

.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(2.5rem, 6vw, 4.5rem); }

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.6rem);
  max-width: 12ch;
}

.hero h1 .accent { color: var(--accent); }

.hero-lede {
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  color: var(--ink-soft);
  max-width: 46ch;
  margin-top: 1.6rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.98rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
}

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

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.btn-ghost:hover { border-color: var(--ink); }

.btn .arrow { transition: transform 0.18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.hero-figure { position: relative; }

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

/* Convergence line-draw animation */
.ray {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw 1.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.ray.r2 { animation-delay: 0.08s; }
.ray.r3 { animation-delay: 0.16s; }
.ray.r4 { animation-delay: 0.24s; }
.ray.r5 { animation-delay: 0.32s; }
.ray.r6 { animation-delay: 0.40s; }
.ray.r7 { animation-delay: 0.48s; }

.apex-fill { opacity: 0; animation: fade 0.9s ease 0.6s forwards; }
.vertex-dot { opacity: 0; animation: fade 0.6s ease 1.1s forwards; }

@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  .ray { animation: none; stroke-dashoffset: 0; }
  .apex-fill, .vertex-dot { animation: none; opacity: 1; }
}

/* ---------- Meta strip ---------- */

.meta-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.meta-strip .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.2rem, 4vw, 3.5rem);
  padding-block: 1.15rem;
}

.meta-item {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.meta-item b { color: var(--ink); font-weight: 500; }
.meta-item .tick { color: var(--accent); }

/* ---------- Section shell ---------- */

.section { padding-block: clamp(4rem, 8vw, 7rem); }

.section-head { max-width: 60ch; margin-bottom: clamp(2.4rem, 5vw, 3.6rem); }

.section-head h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); }

.section-head p { color: var(--ink-soft); margin-top: 1rem; font-size: 1.08rem; }

/* ---------- Capabilities ---------- */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.cap {
  background: var(--surface);
  padding: clamp(1.6rem, 3vw, 2.4rem);
}

.cap-index {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.cap h3 {
  font-size: 1.32rem;
  margin: 1.3rem 0 0.7rem;
  letter-spacing: -0.01em;
}

.cap p { color: var(--ink-soft); font-size: 0.98rem; margin: 0; }

/* ---------- Approach ---------- */

.approach { background: var(--ink); color: var(--paper); }

.approach .section-head h2 { color: var(--paper); }
.approach .eyebrow { color: #7FD8C7; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.4rem, 3vw, 2.4rem);
}

.step { border-top: 1px solid rgba(255, 255, 255, 0.16); padding-top: 1.3rem; }

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #7FD8C7;
  letter-spacing: 0.1em;
}

.step h3 {
  color: var(--paper);
  font-size: 1.22rem;
  margin: 0.9rem 0 0.6rem;
}

.step p {
  color: rgba(243, 243, 239, 0.72);
  font-size: 0.94rem;
  margin: 0;
}

/* ---------- Work / products ---------- */

.work-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

.work-lede p { color: var(--ink-soft); font-size: 1.08rem; }

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

.domain-list li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.domain-list li:first-child { border-top: 1px solid var(--line); }

.domain-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  white-space: nowrap;
  min-width: 3.2rem;
}

.domain-list strong { font-weight: 600; display: block; margin-bottom: 0.1rem; }
.domain-list span { color: var(--ink-soft); font-size: 0.95rem; }

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

.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 3.4rem);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.contact-card h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
.contact-card p { color: var(--ink-soft); margin-top: 0.9rem; max-width: 40ch; }

.contact-rows { display: grid; gap: 1.15rem; }

.contact-row { display: grid; gap: 0.2rem; }

.contact-row .label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.contact-row a, .contact-row .val {
  text-decoration: none;
  font-size: 1.05rem;
  color: var(--ink);
}

.contact-row a:hover { color: var(--accent); }

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

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding-bottom: 2.4rem;
  border-bottom: 1px solid var(--line);
}

.footer-brand .wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.footer-legal-note {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 44ch;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 2.2rem;
  justify-content: flex-end;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.9rem;
  font-weight: 500;
}

.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }

.footer-col a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.94rem;
  transition: color 0.18s ease;
}

.footer-col a:hover { color: var(--ink); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.8rem;
}

.footer-reg {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
  line-height: 1.7;
}

.footer-reg b { color: var(--ink); font-weight: 500; }

.footer-copy { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint); }

/* ---------- Reveal ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- Legal pages ---------- */

.legal-hero { padding: clamp(3rem, 7vw, 5rem) 0 clamp(1.5rem, 4vw, 2.5rem); }

.legal-hero h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }

.legal-hero .updated {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
  margin-top: 1rem;
}

.legal-body { padding-bottom: clamp(4rem, 8vw, 6rem); max-width: 74ch; }

.legal-body h2 {
  font-size: 1.4rem;
  margin: 2.6rem 0 0.9rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.legal-body h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0.5rem; }

.legal-body h3 { font-size: 1.1rem; margin: 1.6rem 0 0.6rem; }

.legal-body p, .legal-body li { color: var(--ink-soft); font-size: 1rem; }

.legal-body ul { padding-left: 1.2rem; margin: 0 0 1.1rem; }

.legal-body li { margin-bottom: 0.5rem; }

.legal-body a { color: var(--accent-deep); }

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  text-decoration: none;
  margin-bottom: 1.8rem;
}

.legal-back:hover { color: var(--accent); }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--gutter) 1.4rem;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links li { width: 100%; border-bottom: 1px solid var(--line); }
  .nav-links li:last-child { border-bottom: none; padding-top: 0.8rem; }
  .nav-links a { display: block; padding: 0.95rem 0; font-size: 1.02rem; }
  .nav-cta { display: inline-block; }
  .nav-toggle { display: inline-flex; }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-figure { order: -1; max-width: 380px; }

  .cap-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .work-grid { grid-template-columns: 1fr; }
  .contact-card { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 520px) {
  .steps { grid-template-columns: 1fr; }
  .meta-strip .wrap { gap: 0.8rem 1.6rem; }
}

.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* Focus visibility */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}