/* ================================================
   nav.css — Shared navigation, tokens & drawer
   Stonebridge Builders
   ================================================ */

/* ── DESIGN TOKENS ── */
:root {
  --navy:       #1D3557;
  --navy-dark:  #142640;
  --navy-light: #2A4A6A;
  --navy-lt:    #2A4A6A;
  --amber:      #C49128;
  --amber-h:    #A87A1E;
  --white:      #FFFFFF;
  --off-white:  #F6F5F2;
  --cream:      #EFECE6;
  --border:     #DEDBD4;
  --text:       #111111;
  --body:       #383838;
  --mid:        #646464;
  --serif: 'Playfair Display', Georgia, serif;
  --sans:  'DM Sans', system-ui, -apple-system, sans-serif;
  --px: clamp(20px, 5.5vw, 72px);
  --py: clamp(60px, 9vw, 112px);
}

/* ── NAV BASE (sticky white — interior pages) ── */
nav {
  position: sticky; top: 0; z-index: 160;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px var(--px);
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--border);
  transition: background .35s, padding .35s, box-shadow .35s;
}

/* ── NAV TRANSPARENT VARIANT (homepage — fixed, starts clear) ── */
nav[data-transparent] {
  position: fixed; left: 0; right: 0; z-index: 160;
  background: transparent;
  box-shadow: none;
  padding: 22px var(--px);
}
nav[data-transparent].scrolled {
  background: rgba(29,53,87,.97);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  padding: 13px var(--px);
  box-shadow: 0 1px 0 rgba(255,255,255,.1);
}

/* ── LOGO ── */
.nav-logo {
  z-index: 110; position: relative;
  display: flex; align-items: center;
}
.nav-logo img { height: 38px; width: auto; display: block; }
.logo-white { display: none; }
.logo-dark  { display: block; }
nav[data-transparent] .logo-white { display: block; }
nav[data-transparent] .logo-dark  { display: none; }

/* ── NAV LINKS ── */
.nav-links { display: flex; gap: clamp(18px, 2.5vw, 36px); list-style: none; }
.nav-links a {
  font-size: .75rem; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--body);
  transition: color .25s; border-bottom: 1px solid transparent; padding-bottom: 2px;
}
.nav-links a:hover,
.nav-links a.active { color: var(--navy); border-color: var(--navy); }
nav[data-transparent] .nav-links a { color: rgba(255,255,255,.85); }
nav[data-transparent] .nav-links a:hover,
nav[data-transparent] .nav-links a.active { color: #fff; border-color: rgba(255,255,255,.5); }

/* ── HAMBURGER ── */
.hamburger {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px;
  background: none; border: none; cursor: pointer;
  z-index: 200; padding: 5px;
  transition: transform .2s;
}
.hamburger:active { transform: scale(.9); }

/* Watery morph animation — fires on every open/close click */
@keyframes hamWater {
  0%   { filter: blur(0);     transform: scale(1); }
  22%  { filter: blur(2.8px); transform: scale(1.08); }
  55%  { filter: blur(1.2px); transform: scale(0.95); }
  78%  { filter: blur(.4px);  transform: scale(1.02); }
  100% { filter: blur(0);     transform: scale(1); }
}
.hamburger.is-animating { animation: hamWater .58s cubic-bezier(.22,1,.36,1); }

.hamburger span {
  display: block; height: 2px; border-radius: 2px;
  background: var(--navy);
  transition: transform .52s cubic-bezier(.34,1.56,.64,1),
              opacity   .32s ease,
              background .3s ease;
  transform-origin: center;
}
nav[data-transparent] .hamburger span { background: #fff; }

/* Animate bars → X */
/* Interior pages: white nav → X stays navy */
.hamburger[aria-expanded="true"] span                  { background: var(--navy); }
/* Homepage: nav is transparent/navy → X turns white */
nav[data-transparent] .hamburger[aria-expanded="true"] span { background: #fff; }
.hamburger[aria-expanded="true"] span:nth-child(1)     { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2)     { opacity: 0; transform: scaleX(0); }
.hamburger[aria-expanded="true"] span:nth-child(3)     { transform: translateY(-7px) rotate(-45deg); }

/* ── MOBILE DRAWER ── */
.nav-drawer {
  position: fixed; inset: 0; z-index: 145;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: var(--navy);
  /* hidden — slides off to the right */
  visibility: hidden;
  transform: translateX(100%);
  transition: transform .55s cubic-bezier(.22,1,.36,1),
              visibility .55s;
  pointer-events: none;
}
.nav-drawer.is-open {
  visibility: visible;
  transform: translateX(0);
  pointer-events: all;
}

/* Drawer logo mark */
.nav-drawer-logo {
  height: 48px; width: auto; display: block;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity .4s .3s ease, transform .4s .3s ease;
}
.nav-drawer.is-open .nav-drawer-logo { opacity: .9; transform: none; }

/* Drawer links — slide in from right with stagger */
.drawer-link {
  display: block;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 9vw, 3.2rem);
  font-weight: 700;
  color: rgba(255,255,255,.78);
  letter-spacing: .01em;
  padding: 10px 0;
  opacity: 0;
  transform: translateX(60px);
  transition: color .25s ease,
              opacity .45s ease,
              transform .5s cubic-bezier(.22,1,.36,1);
}
.drawer-link:hover { color: var(--amber); }

.nav-drawer.is-open .drawer-link { opacity: 1; transform: translateX(0); }
.nav-drawer.is-open a.drawer-link:nth-of-type(1) { transition-delay: .22s; }
.nav-drawer.is-open a.drawer-link:nth-of-type(2) { transition-delay: .32s; }
.nav-drawer.is-open a.drawer-link:nth-of-type(3) { transition-delay: .42s; }

/* Drawer footer details */
.drawer-details {
  margin-top: 40px;
  text-align: center;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .4s .52s ease, transform .4s .52s ease;
}
.nav-drawer.is-open .drawer-details { opacity: 1; transform: none; }
.drawer-details-email {
  font-size: .75rem; color: rgba(255,255,255,.45);
  letter-spacing: .06em; margin-bottom: 8px; display: block;
}
.drawer-details-area {
  font-size: .6rem; font-weight: 500; letter-spacing: .18em;
  text-transform: uppercase; color: rgba(255,255,255,.25);
}
.drawer-copy {
  font-size: .56rem; color: rgba(255,255,255,.18);
  letter-spacing: .1em; margin-top: 18px; display: block;
}

/* ── RESPONSIVE BREAKPOINTS ── */
@media (max-width: 900px) {
  .nav-links  { display: none; }
  .hamburger  { display: flex; }
}
@media (max-width: 580px) {
  nav                          { padding: 14px 20px; }
  nav[data-transparent]        { padding: 18px 20px; }
  nav[data-transparent].scrolled { padding: 12px 20px; }
  /* Scale all button-style elements for mobile readability */
  .btn-primary, .btn-submit {
    font-size: .66rem !important;
    padding: 11px 24px !important;
    letter-spacing: .1em !important;
  }
  .btn-submit { width: 100% !important; }
}