/* ==========================================================================
   Architect Theme — Vanguard Platform Advisory
   Minimalist, high-contrast, blueprint-blue accents.
   "Mapping the chaos into a blueprint."
   ========================================================================== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-white: #ffffff;
  --c-black: #000000;
  --c-blue: #0057ff;
  --c-blue-light: #e6eeff;
  --c-gray-100: #f1f3f5;
  --c-gray-200: #e9ecef;
  --c-gray-400: #ced4da;
  --c-gray-600: #6c757d;
  --c-text: #1a1a1a;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --nav-height: 60px;
  --grid-size: 20px;
}

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }

body.site {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-white);
  -webkit-font-smoothing: grayscale;
}

a { color: var(--c-blue); text-decoration: none; border-bottom: 1px solid transparent; transition: all 0.2s; }
a:hover { border-bottom-color: var(--c-blue); }

/* --- Navigation (Blueprint Grid Header) --- */
.site__nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--c-white);
  border-bottom: 2px solid var(--c-black);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-black) !important;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-bottom: none !important;
}

.nav__links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-gray-600) !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: none !important;
}

.nav__link:hover,
.nav__link--active {
  color: var(--c-blue) !important;
}

/* --- Mobile toggle --- */
.nav__toggle-input {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}

.nav__toggle-label {
  display: none;
  cursor: pointer;
  width: 24px; height: 20px;
  position: relative;
  z-index: 101;
}

.nav__toggle-icon,
.nav__toggle-icon::before,
.nav__toggle-icon::after {
  display: block;
  width: 100%; height: 2px;
  background: var(--c-black);
  transition: transform 0.3s, opacity 0.3s;
}

.nav__toggle-icon { position: relative; top: 9px; }
.nav__toggle-icon::before,
.nav__toggle-icon::after { content: ''; position: absolute; }
.nav__toggle-icon::before { top: -7px; }
.nav__toggle-icon::after { top: 7px; }

.nav__toggle-input:checked ~ .nav__toggle-label .nav__toggle-icon { background: transparent; }
.nav__toggle-input:checked ~ .nav__toggle-label .nav__toggle-icon::before { top: 0; transform: rotate(45deg); }
.nav__toggle-input:checked ~ .nav__toggle-label .nav__toggle-icon::after { top: 0; transform: rotate(-45deg); }

/* --- Main --- */
.site__main {
  margin-top: var(--nav-height);
}

/* --- Sections --- */
.section {
  padding: 6rem max(2rem, 50% - var(--max-width) / 2);
  position: relative;
}

/* Blueprint Grid Overlay */
.section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--c-gray-100) 1px, transparent 1px),
    linear-gradient(to bottom, var(--c-gray-100) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  z-index: -1;
  pointer-events: none;
}

.section > *:not(.card) {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.section h2 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-blue);
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: var(--c-white);
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--c-blue);
}

.section h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--c-black);
  margin-top: 3rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section p {
  margin-bottom: 1.5rem;
  max-width: 65ch;
  line-height: 1.7;
}

.section ul {
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

.section li {
  margin-bottom: 0.75rem;
  position: relative;
}

.section li::marker {
  color: var(--c-blue);
  font-family: var(--font-mono);
}

.section strong {
  color: var(--c-black);
  background: var(--c-blue-light);
  padding: 0 0.2rem;
}

/* --- Hero (Blueprint Blueprint) --- */
.section--hero {
  padding: 10rem max(2rem, 50% - var(--max-width) / 2) 8rem;
  background: var(--c-black);
  color: var(--c-white);
  text-align: left;
}

.section--hero::before {
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
}

.section--hero h1 {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 0.95;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.section--hero p {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--c-gray-400);
  max-width: 60ch;
  margin-left: 0;
}

.section--hero strong {
  background: var(--c-blue);
  color: var(--c-white);
}

/* Hero CTAs */
.section--hero p:last-child a {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  margin: 1rem 1rem 0 0;
  border: 1px solid var(--c-white);
  border-radius: 0;
  background: transparent;
  color: var(--c-white) !important;
  transition: all 0.2s;
}

.section--hero p:last-child a:first-child {
  background: var(--c-blue);
  border-color: var(--c-blue);
}

.section--hero p:last-child a:first-child:hover {
  background: var(--c-white);
  color: var(--c-black) !important;
  border-color: var(--c-white);
}

.section--hero p:last-child a:last-child:hover {
  background: var(--c-white);
  color: var(--c-black) !important;
}

/* --- Cards (Technical Schematic) --- */
.card {
  max-width: var(--max-width);
  margin: 2rem auto;
  padding: 2.5rem;
  background: var(--c-white);
  border: 1px solid var(--c-black);
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 4px 4px 0 var(--c-blue);
}

/* schematic corner markers */
.card::after {
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 20px; height: 20px;
  background: var(--c-blue);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.card p:first-child strong {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--c-black);
  display: block;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: none;
  padding: 0;
}

.card p:last-child {
  margin-bottom: 0;
  color: var(--c-gray-600);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- AI Approach lead-in --- */
.section--ai-approach > p > strong:first-child {
  background: var(--c-blue);
  color: var(--c-white);
}

/* --- Contact Form (Architectural Specs) --- */
.form {
  max-width: 800px;
  margin: 4rem auto 0;
  border: 1px solid var(--c-black);
  padding: 3rem;
  background: var(--c-white);
}

.form__field {
  margin-bottom: 2rem;
}

.form__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--c-gray-600);
  margin-bottom: 0.5rem;
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border: 1px solid var(--c-gray-200);
  background: var(--c-gray-100);
  color: var(--c-black);
  transition: border-color 0.2s;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--c-blue);
  background: var(--c-white);
}

.form__submit {
  display: inline-block;
  padding: 1.2rem 3rem;
  background: var(--c-black);
  color: var(--c-white);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.form__submit:hover {
  background: var(--c-blue);
}

/* --- Footer --- */
.site__footer {
  background: var(--c-black);
  color: var(--c-gray-400);
  padding: 4rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__address {
  color: var(--c-gray-600);
}

/* --- Responsive --- */
@media (max-width: 1130px) {
  .nav__toggle-label { display: block; }

  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--c-white);
    border-bottom: 2px solid var(--c-black);
    padding: 1rem 2rem 1.5rem;
    flex-direction: column;
    gap: 0.25rem;
  }

  .nav__toggle-input:checked ~ .nav__links { display: flex; }

  .nav__link {
    font-size: 0.85rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--c-gray-100);
  }

}

@media (max-width: 900px) {
  .section { padding: 4rem 1.5rem; }
  .section--hero { padding: 8rem 1.5rem 5rem; }
  .section--hero h1 { font-size: 2.8rem; }
  .form { padding: 1.5rem; }
}

@media (min-width: 768px) {
  .section--services-advisory,
  .section--services-delivery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .section--services-advisory > *,
  .section--services-delivery > * {
    grid-column: 1 / -1;
  }
  .section--services-advisory > .card,
  .section--services-delivery > .card {
    grid-column: span 1;
    margin: 0;
  }
}