/* ============================================================
   styles.css — page-specific layout for index.html
   ============================================================ */

/* ---- Header / Nav ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 72px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}
.brand .mark {
  width: 22px; height: 22px;
  border: 2px solid var(--accent);
  transform: rotate(45deg);
  display: inline-block;
}
.nav-links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0; padding: 0;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
}
.nav-links a { position: relative; padding: 0.25rem 0; transition: color .25s var(--ease); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px; background: var(--accent);
  transition: width .3s var(--ease);
}
.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--line);
  border-radius: var(--radius);
  width: 44px; height: 40px;
  cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 4px;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--ink); transition: .3s; }

/* ---- Hero — geometric blueprint grid ---- */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(transparent 0 calc(100% - 1px), var(--line) calc(100% - 1px)) 0 0 / 100% 64px,
    linear-gradient(90deg, transparent 0 calc(100% - 1px), var(--line) calc(100% - 1px)) 0 0 / 64px 100%,
    var(--paper);
}
.hero::before {
  content: "";
  position: absolute; right: -8%; top: -20%;
  width: 540px; height: 540px;
  border: 1px solid var(--accent-2);
  transform: rotate(45deg);
  opacity: 0.35;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute; right: 6%; top: 14%;
  width: 280px; height: 280px;
  background: var(--accent);
  opacity: 0.08;
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  align-items: end;
  padding-block: clamp(4rem, 12vh, 9rem) clamp(3rem, 8vh, 6rem);
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: clamp(2.6rem, 7vw, 6rem);
  margin-top: 1.2rem;
}
.hero h1 .line2 { display: block; color: var(--accent); }
.hero-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  max-width: 42ch;
  color: var(--ink-soft);
  margin: 1.4rem 0 2rem;
}
.hero-cta { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.hero-meta {
  border-left: 1px solid var(--line);
  padding-left: 1.5rem;
  font-family: var(--font-display);
  align-self: end;
}
.hero-meta dt { font-size: 0.7rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent-2); }
.hero-meta dd { margin: 0.15rem 0 1.1rem; font-size: 1.05rem; }

/* ---- Section frame ---- */
.section { padding-block: clamp(4rem, 10vh, 7rem); }
.section-head { max-width: 60ch; margin-bottom: 3rem; }
.section-head h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin-top: 0.8rem; }
.section-head p { color: var(--ink-soft); font-size: 1.1rem; }

/* ---- Ventures: asymmetric geometric grid ---- */
.ventures { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.venture {
  background: var(--paper);
  padding: clamp(1.6rem, 3vw, 2.4rem);
  position: relative;
  transition: background .35s var(--ease), color .35s var(--ease);
  min-height: 240px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.venture:hover { background: var(--ink); color: var(--paper); }
.venture .year {
  font-family: var(--font-display);
  font-size: 0.8rem; letter-spacing: 0.2em; color: var(--accent);
}
.venture h3 { font-size: 1.5rem; margin: 0.4rem 0 0.7rem; }
.venture p { font-size: 0.95rem; color: var(--ink-soft); margin: 0; }
.venture:hover p { color: var(--paper-2); }
.venture .go { font-family: var(--font-display); font-size: 0.85rem; margin-top: 1.2rem; color: var(--accent); }
/* span pattern for architectural rhythm */
.v-1 { grid-column: span 7; }
.v-2 { grid-column: span 5; }
.v-3 { grid-column: span 5; }
.v-4 { grid-column: span 7; }

/* ---- Mission band ---- */
.mission {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.mission::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(transparent 0 calc(100% - 1px), rgba(255,255,255,.06) calc(100% - 1px)),
    linear-gradient(90deg, transparent 0 calc(100% - 1px), rgba(255,255,255,.06) calc(100% - 1px));
  background-size: 64px 64px;
}
.mission .wrap { position: relative; }
.mission blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 20ch;
}
.mission blockquote em { color: var(--accent); font-style: normal; }
.mission .mission-body { color: var(--paper-2); max-width: 50ch; margin-top: 1.6rem; }

/* ---- Contact ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { padding: 1.1rem 0; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.contact-list dt, .contact-list .k { font-family: var(--font-display); font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-2); }
.contact-list a:hover { color: var(--accent); }
.contact-card {
  border: 1px solid var(--line);
  padding: 2rem;
  background: var(--white);
  align-self: start;
}
.contact-card .mark-lg {
  width: 64px; height: 64px; border: 2px solid var(--accent);
  transform: rotate(45deg); margin-bottom: 1.4rem;
}

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--line); padding-block: 3rem; }
.footer-grid { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.social { display: flex; gap: 1.2rem; list-style: none; margin: 0; padding: 0; font-family: var(--font-display); font-size: 0.9rem; }
.social a:hover { color: var(--accent); }
.copy { font-size: 0.85rem; color: var(--ink-soft); }

/* ---- Responsive ---- */
@media (max-width: 880px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height .35s var(--ease);
  }
  .nav-links.open { max-height: 480px; }
  .nav-links li { border-top: 1px solid var(--line); }
  .nav-links a { display: block; padding: 1rem var(--gutter); }
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-meta { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 1.5rem; display: grid; grid-template-columns: 1fr 1fr; }
  .ventures { grid-template-columns: 1fr; }
  .v-1,.v-2,.v-3,.v-4 { grid-column: span 1; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
}