/* Vector Asset Analytics — Design System 2026
   Clean, professional, high-signal. No cyber aesthetics.
*/

:root {
  /* Color tokens */
  --color-base-dark: #0F1419;
  --color-bg-content: #F7F6F3;
  --color-bg-white: #FFFFFF;
  --color-accent: #2A6F6A;
  --color-accent-hover: #1F5652;
  --color-accent-soft: rgba(42, 111, 106, 0.08);
  --color-text-primary: #111827;
  --color-text-secondary: #4B5563;
  --color-text-on-dark: #F3F4F6;
  --color-text-on-dark-muted: #9CA3AF;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-dark: rgba(255, 255, 255, 0.08);
  --color-border-accent: rgba(42, 111, 106, 0.25);

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --text-body: 1.0625rem; /* 17px */
  --leading-body: 1.65;
  --leading-tight: 1.25;

  /* Spacing & layout */
  --max-width: 72rem; /* 1152px */
  --header-height: 4.25rem;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
}

/* Reset & base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg-content);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--color-accent-hover); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: var(--leading-tight); color: var(--color-text-primary); letter-spacing: -0.02em; }
p { margin: 0; }

/* Layout utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
@media (min-width: 768px) {
  .container { padding-left: 2rem; padding-right: 2rem; }
}

.section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}
@media (min-width: 768px) {
  .section { padding-top: 5.5rem; padding-bottom: 5.5rem; }
}

.section-dark {
  background-color: var(--color-base-dark);
  color: var(--color-text-on-dark);
}
.section-dark h1,
.section-dark h2,
.section-dark h3 { color: var(--color-text-on-dark); }
.section-dark p { color: var(--color-text-on-dark-muted); }

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 20, 25, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-dark);
  height: var(--header-height);
  /* relative containing block for absolute mobile nav */
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1.5rem;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text-on-dark);
  flex-shrink: 0;
}
.logo-link:hover { color: var(--color-text-on-dark); }
.logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 0.25rem;
  /* logo.jpeg currently has a solid black background; transparent PNG/SVG preferred */
}
.logo-text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-text-on-dark);
}
.logo-text span { color: var(--color-accent); }

.nav-desktop {
  display: none;
  align-items: center;
  gap: 1.75rem;
}
@media (min-width: 900px) {
  .nav-desktop { display: flex; }
}
.nav-desktop a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-on-dark-muted);
  text-decoration: none;
  transition: color 0.15s ease;
  border-radius: 0.25rem;
}
.nav-desktop a:hover,
.nav-desktop a[aria-current="page"] {
  color: var(--color-text-on-dark);
}
.nav-desktop a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.nav-desktop a.nav-cta {
  color: var(--color-accent);
  font-weight: 600;
}
.nav-desktop a.nav-cta:hover { color: #3d8f89; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.linkedin-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--color-text-on-dark-muted);
  border-radius: 0.375rem;
  transition: color 0.15s ease, background 0.15s ease;
}
.linkedin-link:hover {
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.06);
}
.linkedin-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.linkedin-link svg { width: 18px; height: 18px; }

/* Mobile menu button */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  color: var(--color-text-on-dark);
  cursor: pointer;
  border-radius: 0.375rem;
  padding: 0;
}
@media (min-width: 900px) {
  .menu-toggle { display: none; }
}
.menu-toggle:hover { background: rgba(255,255,255,0.06); }
.menu-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.menu-toggle svg { width: 22px; height: 22px; }

/* Mobile nav panel */
.nav-mobile {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  z-index: 40;
  background: var(--color-base-dark);
  border-bottom: 1px solid var(--color-border-dark);
  padding: 1rem 1.25rem 1.5rem;
  flex-direction: column;
  gap: 0.25rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}
.nav-mobile.is-open { display: flex; }
.nav-mobile a {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-on-dark-muted);
  text-decoration: none;
  border-radius: 0.375rem;
}
.nav-mobile a:hover,
.nav-mobile a[aria-current="page"] {
  color: var(--color-text-on-dark);
  background: rgba(255,255,255,0.04);
}
.nav-mobile a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.nav-mobile a.nav-cta { color: var(--color-accent); }

/* ========== FOOTER ========== */
.site-footer {
  background: var(--color-base-dark);
  color: var(--color-text-on-dark-muted);
  padding-top: 3.5rem;
  padding-bottom: 2.5rem;
  border-top: 1px solid var(--color-border-dark);
}
.footer-grid {
  display: grid;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 2rem;
  }
}
.footer-brand .logo-link { margin-bottom: 0.75rem; }
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.55;
  max-width: 22rem;
  color: var(--color-text-on-dark-muted);
}
.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-on-dark);
  margin-bottom: 1rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a {
  font-size: 0.9rem;
  color: var(--color-text-on-dark-muted);
  text-decoration: none;
}
.footer-col a:hover { color: var(--color-text-on-dark); }
.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-border-dark);
  font-size: 0.8rem;
}
@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}
.footer-bottom a { color: var(--color-text-on-dark-muted); }
.footer-bottom a:hover { color: var(--color-text-on-dark); }

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}
.btn-primary:focus-visible {
  outline-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-text-secondary);
  background: rgba(0,0,0,0.02);
  color: var(--color-text-primary);
}
.btn-on-dark {
  background: transparent;
  color: var(--color-text-on-dark);
  border-color: var(--color-border-dark);
}
.btn-on-dark:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.18);
  color: var(--color-text-on-dark);
}
.btn-on-dark:focus-visible {
  outline-color: rgba(255,255,255,0.5);
}
.btn-accent-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-border-accent);
}
.btn-accent-outline:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent-hover);
}

/* ========== HERO ========== */
.hero {
  background: var(--color-base-dark);
  color: var(--color-text-on-dark);
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
}
@media (min-width: 768px) {
  .hero { padding-top: 6rem; padding-bottom: 6rem; }
}
.hero-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.15rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--color-text-on-dark);
  max-width: 18ch;
  margin-bottom: 1.25rem;
}
.hero-lead {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text-on-dark-muted);
  max-width: 36rem;
  margin-bottom: 2rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ========== CONTENT SECTIONS ========== */
.section-header {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  margin-bottom: 0.75rem;
}
.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

.prose-block {
  max-width: 42rem;
}
.prose-block p {
  margin-bottom: 1.15rem;
  color: var(--color-text-secondary);
}
.prose-block p:last-child { margin-bottom: 0; }
.prose-block strong { color: var(--color-text-primary); font-weight: 600; }

/* Cards */
.card-grid {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 640px) {
  .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
  .card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
}
.card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
}
.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}
.card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}
.card-number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-bottom: 0.6rem;
}

/* Feature list / OCAP style */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.feature-item {
  display: grid;
  gap: 0.35rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}
.feature-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.feature-item h3 {
  font-size: 1.05rem;
}
.feature-item p {
  color: var(--color-text-secondary);
  font-size: 0.98rem;
}

/* Split layout */
.split {
  display: grid;
  gap: 2.5rem;
}
@media (min-width: 768px) {
  .split {
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
    align-items: start;
  }
}

/* Callout / highlight box */
.callout {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.35rem 1.4rem;
}
.callout p {
  color: var(--color-text-secondary);
  font-size: 0.98rem;
  margin: 0;
}
.callout strong { color: var(--color-text-primary); }

/* CTA band */
.cta-band {
  background: var(--color-base-dark);
  padding: 3.5rem 0;
  text-align: center;
}
.cta-band h2 {
  color: var(--color-text-on-dark);
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  margin-bottom: 0.6rem;
}
.cta-band p {
  color: var(--color-text-on-dark-muted);
  max-width: 32rem;
  margin: 0 auto 1.75rem;
  font-size: 1.05rem;
}
.cta-band .hero-actions {
  justify-content: center;
}

/* Page header (for Ledger etc.) */
.page-header {
  background: var(--color-base-dark);
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}
@media (min-width: 768px) {
  .page-header { padding-top: 4.5rem; padding-bottom: 4.5rem; }
}
.page-header .hero-label { margin-bottom: 1rem; }
.page-header h1 {
  font-size: clamp(1.85rem, 4.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text-on-dark);
  margin-bottom: 0.85rem;
  max-width: 22ch;
}
.page-header .lead {
  font-size: 1.125rem;
  color: var(--color-text-on-dark-muted);
  max-width: 36rem;
  line-height: 1.55;
}

/* Content stack for long pages */
.content-stack {
  display: flex;
  flex-direction: column;
  gap: 3.25rem;
}
@media (min-width: 768px) {
  .content-stack { gap: 4rem; }
}
.content-block h2 {
  font-size: 1.35rem;
  margin-bottom: 0.85rem;
}
.content-block p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}
.content-block p:last-child { margin-bottom: 0; }
.content-block ul {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.content-block li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--color-text-secondary);
  font-size: 0.98rem;
}
.content-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.7;
}

/* ========== FORMS ========== */
.form-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 36rem;
}
.form-row {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 640px) {
  .form-row.cols-2 { grid-template-columns: 1fr 1fr; }
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-primary);
}
.form-group .hint {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.7rem 0.85rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.form-input:focus-visible,
.form-textarea:focus-visible,
.form-select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.form-textarea {
  min-height: 8rem;
  resize: vertical;
  line-height: 1.5;
}
.form-actions {
  margin-top: 0.5rem;
}
.form-note {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 1rem;
}
.form-status {
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 0.75rem;
  min-height: 1.25rem;
}
.form-status.is-success { color: var(--color-accent); }
.form-status.is-error { color: #b91c1c; }

/* Contact layout */
.contact-layout {
  display: grid;
  gap: 2.5rem;
}
@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr 1.15fr;
    gap: 3.5rem;
    align-items: start;
  }
}
.contact-aside p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}
.contact-aside p:last-child { margin-bottom: 0; }

/* Utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.text-center { text-align: center; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-0 { margin-bottom: 0; }