/* ============================================
   LAYOUT.CSS — Grid, Containers, Nav, Footer
   ============================================ */

/* ============================================
   HERO — Home Page
   ============================================ */
.hero--home {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--s8);
  padding-bottom: var(--s8);
  overflow: hidden;
}

.hero__container {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 900px;
}

.hero__label {
  margin-bottom: var(--s3);
}

.hero__headline {
  margin-bottom: var(--s4);
}

.hero__sub {
  margin-bottom: var(--s5);
}

.hero__sub-text {
  font-size: 1.15rem;
  max-width: 520px;
}

.hero__flow {
  margin-bottom: var(--s5);
}

/* ============================================
   SECTION MODIFIERS
   ============================================ */
.section--border-top {
  border-top: 1px solid var(--border);
}

.section--border-y {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section--alt {
  background: var(--base-1);
}

/* ============================================
   PHILOSOPHY GRID
   ============================================ */
.grid-philosophy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s7);
  align-items: center;
}

.ecosystem-list {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

/* 4-column grid for Ecosystem Pillars */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s4);
}

@media (max-width: 1100px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
}


/* ============================================
   PATHWAYS GRID
   ============================================ */
.grid-pathways {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--s7);
  align-items: start;
}

.pathways-list {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

/* ============================================
   CTA STRIP
   ============================================ */
.cta-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s3);
}

.cta-strip__text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* ============================================
   UTILITY — Spacing & Small helpers
   ============================================ */
.mt-1 { margin-top: var(--s1); }
.mt-2 { margin-top: var(--s2); }
.mt-3 { margin-top: var(--s3); }
.mt-4 { margin-top: var(--s4); }
.mt-5 { margin-top: var(--s5); }

.mb-1 { margin-bottom: var(--s1); }
.mb-2 { margin-bottom: var(--s2); }
.mb-3 { margin-bottom: var(--s3); }
.mb-4 { margin-bottom: var(--s4); }
.mb-5 { margin-bottom: var(--s5); }
.mb-6 { margin-bottom: var(--s6); }

.py-1 { padding-top: var(--s1); padding-bottom: var(--s1); }
.py-2 { padding-top: var(--s2); padding-bottom: var(--s2); }
.py-3 { padding-top: var(--s3); padding-bottom: var(--s3); }
.py-4 { padding-top: var(--s4); padding-bottom: var(--s4); }

.pt-5 { padding-top: var(--s5); }
.pb-none { padding-bottom: 0 !important; }
.border-b-none { border-bottom: none !important; }

.max-w-header { max-width: 560px; }
.max-w-sidebar { max-width: 400px; }
.max-w-content { max-width: 460px; }

.order-1 { order: 1; }
.order-2 { order: 2; }

.text-xs { font-size: 0.8rem; }
.text-sm { font-size: 0.9rem; }
.text-md { font-size: 1rem; }
.text-lg { font-size: 1.25rem; }
.text-xl { font-size: 1.4rem; }

.line-tight { line-height: 1.05; }

.flex-column-gap-2 { display: flex; flex-direction: column; gap: var(--s2); }
.flex-column-gap-4 { display: flex; flex-direction: column; gap: var(--s4); }

.flex-align-center-gap-2 { display: flex; align-items: center; gap: var(--s2); }
.flex-wrap-gap-1 { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.flex-center-gap-none { justify-content: center; gap: 0; }

.px-2 { padding-left: var(--s2); padding-right: var(--s2); }
.px-3 { padding-left: var(--s3); padding-right: var(--s3); }
.px-4 { padding-left: var(--s4); padding-right: var(--s4); }

.py-4-top { padding-top: var(--s4); }

.dim { color: var(--text-muted); }
.accent { color: var(--cyan); }
.font-light { font-weight: 300; }
.letter-widest { letter-spacing: 0.15em; }

.border-top-muted { border-top: 1px solid var(--border); }
.border-cyan-light { border-color: rgba(0,240,255,0.2) !important; }
.bg-cyan-ultra-low { background: rgba(0,240,255,0.03) !important; }

.section--rounded-lg { border-radius: var(--r4); }
.section--surface { background: var(--surface); }
.section--border-muted { border-color: var(--border); }

.grid-2-col-start { display: grid;  grid-template-columns: 1fr 1fr; gap: var(--s7); align-items: start; }

.section-h2 {
  margin-bottom: var(--s4);
}

.section-h2--sm {
  margin-bottom: var(--s3);
}

.section-sub--center {
  margin: var(--s2) auto 0;
}

/* ============================================
   SYSTEM LAYOUT PATTERNS
   ============================================ */
.system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s7);
  align-items: start;
  position: relative;
}

.system-list {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

.system-header-flex {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s4);
  flex-wrap: wrap;
}

.system-footer-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s3);
}

.flex-center-gap-none {
  justify-content: center;
  gap: 0;
}

.w-full { width: 100% !important; }

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-column-gap-3 { display: flex; flex-direction: column; gap: var(--s3); }
.flex-align-center-gap-3 { display: flex; align-items: center; gap: var(--s3); }

.bg-base-2 { background: var(--base-2); }
.bg-cyan-ultra-low { background: rgba(0,240,255,0.03) !important; }

.text-danger-dim { color: rgba(255,80,80,0.6); }

.section--rounded { border-radius: var(--r3); }

.form-select-custom {
  appearance: none;
  cursor: pointer;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="rgba(255,255,255,0.3)" stroke-width="2"><polyline points="6 9 12 15 18 9"></polyline></svg>');
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 16px;
  padding-right: 2.5rem;
}

.form-success-block {
  display: none;
  margin-top: var(--s3);
  padding: var(--s3);
  border: 1px solid rgba(0,240,255,0.25);
  border-radius: var(--r3);
  background: rgba(0,240,255,0.04);
}

.form-success-block.visible {
  display: block;
}

.grid-3--spaced {
  margin-top: var(--s6);
}

.grid-3--compact {
  margin-top: var(--s5);
  gap: var(--s3);
}

.btn--spaced-top {
  margin-top: var(--s4);
  display: inline-flex;
}

/* Footer small helpers */
.footer-dot {
  width: 5px;
  height: 5px;
  flex-shrink: 0;
}

.footer__copy {
  font-size: 0.75rem;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s4);
}

.container--narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--s4);
}

.container--wide {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--s4);
}

/* Sections */
.section {
  padding: var(--s8) 0;
}

.section--sm {
  padding: var(--s6) 0;
}

.section--lg {
  padding: calc(var(--s8) * 1.5) 0;
}

/* Grid Systems */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s4);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s4);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s3);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--s3) 0;
  transition: background var(--t3), padding var(--t3), border-color var(--t3);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(5,5,5,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--s2) 0;
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--s4);
}

.nav__logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--s1);
}

.nav__logo-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  animation: pulse-dot 2s ease-in-out infinite;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--s5);
}

.nav__link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  transition: color var(--t1);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width var(--t2);
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__cta {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border-active);
  padding: 0.5rem 1.2rem;
  border-radius: var(--r2);
  transition: all var(--t2);
  background: var(--cyan-glow);
}

.nav__cta:hover {
  background: var(--cyan-dim);
  color: var(--cyan);
  transform: translateY(-1px);
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
  z-index: 1001;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all var(--t2);
  transform-origin: center;
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Nav */
.nav__mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--base);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t3);
}

.nav__mobile.open {
  display: flex;
  opacity: 1;
  pointer-events: all;
}

.nav__mobile-link {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-secondary);
  transition: color var(--t2);
  text-align: center;
}

.nav__mobile-link:hover {
  color: var(--cyan);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: var(--s7) 0 var(--s5);
  border-top: 1px solid var(--border);
  margin-top: var(--s8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s6);
  margin-bottom: var(--s6);
}

.footer__brand h3 {
  font-size: 1.3rem;
  margin-bottom: var(--s2);
}

.footer__brand p {
  font-size: 0.9rem;
  max-width: 280px;
  margin-bottom: var(--s3);
}

.footer__col h5 {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: var(--s2);
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--s1);
}

.footer__col ul li a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--t1);
}

.footer__col ul li a:hover {
  color: var(--cyan);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s4);
  border-top: 1px solid var(--border);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__social {
  display: flex;
  gap: var(--s2);
}

.footer__social a {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  transition: color var(--t1);
}

.footer__social a:hover {
  color: var(--cyan);
}

/* ============================================
   PAGE HEADER (inner pages)
   ============================================ */
.page-header {
  padding: calc(var(--s8) + var(--s6)) 0 var(--s7);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--s8);
}

.page-header__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--cyan);
  margin-bottom: var(--s3);
  display: flex;
  align-items: center;
  gap: var(--s2);
}

.page-header__label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--cyan);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--s4); }
  .grid-pathways { grid-template-columns: 1fr 1.5fr; gap: var(--s5); }
}

@media (max-width: 768px) {
  .btn-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
  }
  .btn-group .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  .container { padding: 0 var(--s3); }
  .section { padding: var(--s6) 0; }
  .section--lg { padding: var(--s7) 0; }

  .nav__links, .nav__cta { display: none; }
  .nav__toggle { display: flex; }

  /* All standard grids collapse to single column */
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  /* Philosophy and Pathways custom grids collapse */
  .grid-philosophy,
  .grid-pathways {
    grid-template-columns: 1fr;
    gap: var(--s5);
  }

  /* Flow pipeline wraps gracefully on mobile */
  .flow {
    gap: 0.25rem;
    flex-wrap: wrap;
  }

  .flow__label {
    font-size: 0.8rem;
    padding: 0.4rem 0.75rem;
  }

  /* Hero adjustments */
  .hero--home {
    padding-top: calc(var(--s8) + var(--s4));
    min-height: auto;
    padding-bottom: var(--s6);
  }

  .hero__sub-text {
    font-size: 1rem;
    max-width: 100%;
  }

  /* CTA Strip stacks on mobile */
  .cta-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s4);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--s4);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--s2);
    text-align: center;
  }

  h1 { font-size: clamp(2.4rem, 10vw, 4rem); }
}

@media (max-width: 480px) {
  :root { --s4: 1.25rem; }
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }

  .flow {
    gap: 0.15rem;
  }

  .flow__label {
    font-size: 0.72rem;
    padding: 0.35rem 0.6rem;
  }

  /* Card buttons stay consistent on small screens */
  .btn--sm {
    font-size: 0.78rem;
    padding: 0.55rem 0.9rem;
  }
}