/* ==========================================================================
   Vanguard Theme — Vanguard Platform Advisory
   Industrial, Brutalist Luxury, Nashville-inspired.
   "Solid foundations for the agentic future."
   ========================================================================== */

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

:root {
  --c-stone: #f4f4f2;
  --c-charcoal: #1a1a1a;
  --c-charcoal-light: #2d2d2d;
  --c-copper: #b45309;
  --c-copper-hover: #92400e;
  --c-silver: #d1d5db;
  --c-white: #ffffff;
  --c-border: #000000;
  --font-sans: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --max-width: 1200px;
  --nav-height: 80px;
  --border-thick: 4px;
}

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

body.site {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--c-charcoal);
  background: var(--c-stone);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--c-copper); text-decoration: underline; text-underline-offset: 4px; transition: color 0.2s; }
a:hover { color: var(--c-charcoal); }

/* --- Navigation (Solid Block) --- */
.site__nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--c-charcoal);
  border-bottom: var(--border-thick) solid var(--c-copper);
}

.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-weight: 900;
  font-size: 1.5rem;
  color: var(--c-white) !important;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  text-decoration: none !important;
}

.nav__links {
  display: flex;
  gap: 1.5rem;
}

.nav__link {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-silver) !important;
  text-decoration: none !important;
  transition: all 0.2s;
}

.nav__link:hover {
  color: var(--c-white) !important;
  transform: translateY(-2px);
}

.nav__link--active {
  color: var(--c-copper) !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: 26px; height: 22px;
  position: relative;
  z-index: 101;
}

.nav__toggle-icon,
.nav__toggle-icon::before,
.nav__toggle-icon::after {
  display: block;
  width: 100%; height: 3px;
  background: var(--c-copper);
  transition: transform 0.3s, opacity 0.3s;
}

.nav__toggle-icon { position: relative; top: 10px; }
.nav__toggle-icon::before,
.nav__toggle-icon::after { content: ''; position: absolute; }
.nav__toggle-icon::before { top: -8px; }
.nav__toggle-icon::after { top: 8px; }

.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); }

/* --- Sections --- */
.section {
  padding: 8rem max(2rem, 50% - var(--max-width) / 2);
  border-bottom: var(--border-thick) solid var(--c-charcoal);
}

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

.section h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 900;
  color: var(--c-charcoal);
  margin-bottom: 2.5rem;
  letter-spacing: -0.06em;
  line-height: 0.85;
  text-transform: uppercase;
}

.section h3 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--c-charcoal);
  margin-top: 4rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  background: var(--c-charcoal);
  color: var(--c-white);
  display: inline-block;
  padding: 0.5rem 1rem;
}

.section p {
  margin-bottom: 2rem;
  max-width: 70ch;
  font-weight: 500;
}

.section ul {
  padding-left: 2rem;
  margin-bottom: 3rem;
  list-style: square;
}

.section li {
  margin-bottom: 1rem;
  font-weight: 500;
}

.section li::marker {
  color: var(--c-copper);
}

.section strong {
  font-weight: 900;
  color: var(--c-copper);
}

/* --- Hero (The Forge) --- */
.section--hero {
  background: var(--c-charcoal);
  color: var(--c-white);
  padding: 12rem max(2rem, 50% - var(--max-width) / 2) 10rem;
  border-bottom: 10px solid var(--c-copper);
}

.section--hero h1 {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 900;
  letter-spacing: -0.08em;
  line-height: 0.8;
  margin-bottom: 3rem;
  text-transform: uppercase;
  color: var(--c-white);
}

.section--hero p {
  font-size: 1.4rem;
  max-width: 50ch;
  color: var(--c-silver);
  font-weight: 400;
}

.section--hero p:last-child a {
  display: inline-block;
  padding: 1.25rem 3rem;
  font-weight: 900;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 1rem 1.5rem 0 0;
  text-decoration: none !important;
  transition: all 0.2s;
  border: var(--border-thick) solid var(--c-white);
}

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

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

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

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

/* --- Cards (Industrial Blocks) --- */
.card {
  max-width: var(--max-width);
  margin: 3rem auto;
  padding: 3.5rem;
  background: var(--c-white);
  border: var(--border-thick) solid var(--c-charcoal);
  box-shadow: 12px 12px 0 var(--c-copper);
  transition: all 0.2s;
}

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

.card p:first-child strong {
  font-size: 1.5rem;
  color: var(--c-charcoal);
  display: block;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.card p:last-child {
  margin-bottom: 0;
  color: var(--c-charcoal-light);
  font-weight: 500;
}

/* --- AI Approach --- */
.section--ai-approach > p > strong:first-child {
  background: var(--c-copper);
  color: var(--c-white);
  padding: 0.2rem 0.5rem;
}

/* --- Contact Form --- */
.form {
  max-width: 900px;
  margin: 4rem auto 0;
  border: var(--border-thick) solid var(--c-charcoal);
  padding: 4rem;
  background: var(--c-white);
  box-shadow: 16px 16px 0 var(--c-copper);
}

.form__label {
  display: block;
  font-size: 1rem;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--c-charcoal);
  margin-bottom: 0.75rem;
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 1.25rem;
  font-family: inherit;
  font-size: 1.125rem;
  font-weight: 600;
  border: var(--border-thick) solid var(--c-charcoal);
  background: var(--c-stone);
  color: var(--c-charcoal);
}

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

.form__submit {
  width: 100%;
  padding: 1.5rem;
  background: var(--c-charcoal);
  color: var(--c-white);
  font-size: 1.25rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

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

/* --- Footer --- */
.site__footer {
  background: var(--c-charcoal);
  color: var(--c-silver);
  padding: 5rem 2rem;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- 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-charcoal);
    border-bottom: var(--border-thick) solid var(--c-copper);
    padding: 1rem 2rem 1.5rem;
    flex-direction: column;
    gap: 0.25rem;
  }

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

  .nav__link {
    font-size: 1rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }

}

@media (max-width: 900px) {
  .section { padding: 4rem 1.5rem; }
  .section--hero { padding: 8rem 1.5rem 5rem; }
  .section--hero h1 { font-size: 3.5rem; }
  .form { padding: 2rem; }
  .card { padding: 2rem; }
}

@media (min-width: 768px) {
  .section--services-advisory,
  .section--services-delivery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
  .section--services-advisory > *,
  .section--services-delivery > * {
    grid-column: 1 / -1;
  }
  .section--services-advisory > .card,
  .section--services-delivery > .card {
    grid-column: span 1;
    margin: 0;
  }
}