/* =========================================================
   Silver Bridge Zone — styles.css (core)
   Identity: "The field journal" — premium AU travel editorial
   Warm sand paper · Cormorant Garamond display · Archivo body
   Southern-ocean blue + eucalypt forest + sun ochre
   ========================================================= */

:root {
  /* palette */
  --ink:        #1b2a2e;   /* deep teal-charcoal */
  --ink-soft:   #36474b;
  --ocean:      #1d4e6f;   /* southern ocean blue — primary */
  --ocean-deep: #143a54;
  --ocean-tint: #e4edf1;
  --forest:     #356145;   /* eucalypt forest — nature accent */
  --forest-deep:#244a32;
  --forest-tint:#e7efe7;
  --sun:        #cf8a3c;   /* warm sun ochre — sparing */
  --sun-soft:   #f4e6d2;
  --paper:      #f3eee4;   /* warm sand */
  --surface:    #fbf8f2;   /* lighter warm card */
  --surface-2:  #f7f1e6;
  --sand-deep:  #c9b896;
  --muted:      #66726f;   /* warm grey-green */
  --muted-2:    #8a948f;
  --line:       #e4dccb;   /* warm sand line */
  --line-soft:  #efe8da;
  --danger:     #b6512f;

  /* type */
  --display: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --body:    "Archivo", system-ui, -apple-system, sans-serif;

  --s-1:.5rem; --s-2:.875rem; --s-3:1.25rem; --s-4:1.75rem;
  --s-5:2.5rem; --s-6:3.5rem; --s-7:5rem; --s-8:7rem;

  --radius:8px; --radius-lg:16px; --radius-xl:26px; --radius-pill:999px;

  --shadow-sm: 0 1px 2px rgba(27,42,46,.05), 0 3px 8px rgba(27,42,46,.05);
  --shadow:    0 14px 36px -18px rgba(27,42,46,.28), 0 3px 10px -6px rgba(27,42,46,.08);
  --shadow-lg: 0 36px 80px -34px rgba(20,58,84,.42), 0 10px 30px -18px rgba(27,42,46,.2);

  --maxw: 1240px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } }

body {
  font-family: var(--body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  font-size: 1.0625rem;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,svg { display:block; max-width:100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border:none; background:none; color:inherit; }
ul { list-style:none; padding:0; }

h1,h2,h3,h4 { font-family: var(--display); font-weight:600; line-height:1.08; letter-spacing:-.005em; color:var(--ink); }

::selection { background: var(--ocean); color:#fff; }
:focus-visible { outline:3px solid var(--ocean); outline-offset:3px; border-radius:3px; }

.shell { width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:1.6rem; }
.shell-narrow { max-width:900px; }

/* eyebrow — letterspaced caps */
.eyebrow { font-family:var(--body); font-weight:600; font-size:.74rem; letter-spacing:.22em; text-transform:uppercase; color:var(--ocean); display:inline-flex; align-items:center; gap:.7rem; }
.eyebrow::before { content:""; width:24px; height:1.5px; background:currentColor; }
.eyebrow.center { justify-content:center; }
.eyebrow.on-dark { color:#cfe0e6; }
.eyebrow.sun { color:var(--sun); }
.eyebrow.forest { color:var(--forest); }

/* coordinate / meta chip — map-inspired */
.coord { font-family:var(--body); font-weight:500; font-size:.72rem; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); display:inline-flex; align-items:center; gap:.45rem; }
.coord svg{ width:13px;height:13px; opacity:.7; }

.section { padding-block: var(--s-8); }
.section-warm {
  background:linear-gradient(180deg, var(--paper) 0%, var(--surface-2) 100%);
  border-block:1px solid var(--line-soft);
}
.section-surface { background:var(--surface); border-block:1px solid var(--line); }
.section-itin {
  background:linear-gradient(180deg, var(--surface) 0%, var(--paper) 100%);
  border-block:1px solid var(--line);
}
.section-dark {
  background:var(--ink); color:#fff; position:relative; overflow:hidden;
}
.section-dark::before {
  content:""; position:absolute; inset:0;
  background:radial-gradient(ellipse 70% 50% at 80% 20%, rgba(29,78,111,.35) 0%, transparent 60%),
              radial-gradient(ellipse 50% 40% at 10% 80%, rgba(207,138,60,.12) 0%, transparent 55%);
  pointer-events:none;
}
.section-dark .section-head h2 { color:#fff; }
.section-dark .section-head p { color:rgba(255,255,255,.72); }
.section-dark .tip { background:rgba(255,255,255,.04); border-color:rgba(255,255,255,.12); }
.section-dark .tip h3 { color:#fff; }
.section-dark .tip p { color:rgba(255,255,255,.7); }
.section-dark .tip .ti { background:rgba(207,138,60,.18); color:#f0c98f; }
.section-faq { padding-top:0; background:var(--surface-2); border-top:1px solid var(--line); }
.section-bleed { padding-block:var(--s-6); }
.section.tight { padding-block: var(--s-7); }
.section-head { max-width:680px; margin-bottom:var(--s-6); }
.section-head.center { margin-inline:auto; text-align:center; }
.section-head h2 { font-size:clamp(2.3rem,5vw,3.5rem); margin-top:1rem; }
.section-head p { color:var(--muted); margin-top:1.1rem; font-size:1.16rem; line-height:1.6; }
.section-head .lead-serif { font-family:var(--display); font-size:1.3rem; font-style:italic; color:var(--ink-soft); }

/* ---------- header ---------- */
.site-header { position:sticky; top:0; z-index:50; padding:.85rem 0; transition:padding .35s var(--ease); }
.site-header.scrolled { padding:.55rem 0; }
.header-shell { position:relative; }
.header-inner {
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  min-height:64px; padding:.55rem .85rem .55rem 1.1rem;
  border-radius:var(--radius-xl);
  background:rgba(243,238,228,.72);
  backdrop-filter:saturate(160%) blur(18px);
  border:1px solid rgba(228,220,203,.65);
  box-shadow:0 8px 32px -20px rgba(27,42,46,.35);
  transition:background .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease), transform .35s var(--ease);
}
.site-header.scrolled .header-inner {
  background:rgba(251,248,242,.94);
  border-color:var(--line);
  box-shadow:0 14px 40px -22px rgba(27,42,46,.45);
}
.site-header.hero-mode:not(.scrolled) { background:transparent; }
.site-header.hero-mode:not(.scrolled) .header-inner {
  background:rgba(13,28,38,.28);
  border-color:rgba(255,255,255,.14);
  box-shadow:0 12px 40px -18px rgba(0,0,0,.35);
}
.nav-pill {
  display:flex; align-items:center; gap:.15rem;
  padding:.35rem; border-radius:var(--radius-pill);
  background:rgba(255,255,255,.42); border:1px solid rgba(228,220,203,.55);
}
.site-header.hero-mode:not(.scrolled) .nav-pill {
  background:rgba(255,255,255,.08); border-color:rgba(255,255,255,.12);
}
.nav-pill a { border-radius:var(--radius-pill); }
.brand { display:inline-flex; align-items:center; gap:.7rem; flex:none; }
.brand-mark { width:40px;height:40px; flex:none; }
.brand-name { font-family:var(--display); font-weight:700; font-size:1.4rem; letter-spacing:-.01em; line-height:1; }
.brand-name small { display:block; font-family:var(--body); font-weight:600; font-size:.6rem; letter-spacing:.2em; text-transform:uppercase; color:var(--muted-2); margin-top:3px; }
.hero-mode:not(.scrolled) .brand-name { color:#fff; } .hero-mode:not(.scrolled) .brand-name small{ color:rgba(255,255,255,.7); }
.nav-links { display:flex; align-items:center; gap:.1rem; }
.nav-links a { padding:.5rem .85rem; border-radius:7px; font-weight:500; font-size:.95rem; color:var(--ink-soft); transition:background .2s, color .2s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { background:var(--ocean-tint); color:var(--ocean-deep); }
.hero-mode:not(.scrolled) .nav-links a { color:rgba(255,255,255,.88); }
.hero-mode:not(.scrolled) .nav-links a:hover, .hero-mode:not(.scrolled) .nav-links a[aria-current="page"] { background:rgba(255,255,255,.16); color:#fff; }
.nav-actions { display:flex; align-items:center; gap:.7rem; flex:none; }
.nav-toggle { display:none; width:46px;height:46px;border-radius:9px; align-items:center; justify-content:center; }
.nav-toggle span { position:relative; width:21px;height:2px; background:var(--ink); border-radius:2px; transition:.3s var(--ease); }
.nav-toggle span::before,.nav-toggle span::after { content:""; position:absolute; left:0; width:21px;height:2px; background:var(--ink); border-radius:2px; transition:.3s var(--ease); }
.nav-toggle span::before{ top:-6px; } .nav-toggle span::after{ top:6px; }
.hero-mode:not(.scrolled) .nav-toggle span,.hero-mode:not(.scrolled) .nav-toggle span::before,.hero-mode:not(.scrolled) .nav-toggle span::after { background:#fff; }
.nav-toggle[aria-expanded="true"] span { background:transparent; }
.nav-toggle[aria-expanded="true"] span::before { top:0; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top:0; transform:rotate(-45deg); }
.mobile-menu { display:none; }

/* ---------- buttons ---------- */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:.55rem; padding:.9rem 1.7rem; border-radius:var(--radius-pill); font-weight:600; font-size:.96rem; letter-spacing:.01em; transition:transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s, border-color .25s; white-space:nowrap; }
.btn svg{ width:1.05em;height:1.05em; }
.btn-primary { background:var(--ocean); color:#fff; box-shadow:0 12px 26px -14px rgba(29,78,111,.9); }
.btn-primary:hover { background:var(--ocean-deep); transform:translateY(-2px); }
.btn-sun { background:var(--sun); color:#2a1c08; }
.btn-sun:hover { background:#b9772f; color:#fff; transform:translateY(-2px); }
.btn-ink { background:var(--ink); color:#fff; } .btn-ink:hover{ background:#0f1a1d; transform:translateY(-2px); }
.btn-ghost { background:transparent; color:var(--ink); border:1.5px solid var(--sand-deep); }
.btn-ghost:hover { border-color:var(--ocean); color:var(--ocean-deep); transform:translateY(-2px); }
.btn-ghost.on-dark { color:#fff; border-color:rgba(255,255,255,.45); }
.btn-ghost.on-dark:hover { border-color:#fff; background:rgba(255,255,255,.12); color:#fff; }
.btn-lg { padding:1.05rem 2.1rem; font-size:1.02rem; }
.btn-sm { padding:.55rem 1.1rem; font-size:.86rem; }
.btn-block { width:100%; }

/* ============================================================
   CINEMATIC SCENES (CSS + SVG landscape placeholders)
   ============================================================ */
.scene { position:absolute; inset:0; overflow:hidden; background:var(--ocean-deep); }
.scene > svg { position:absolute; inset:0; width:100%; height:100%; }
.scene-ocean   { background:linear-gradient(180deg,#6fb7c9 0%,#3d89a3 36%,#1d4e6f 78%,#143a54 100%); }
.scene-reef    { background:linear-gradient(180deg,#bfe9e4 0%,#5fc6bf 30%,#1c93a0 60%,#15566b 100%); }
.scene-alpine  { background:linear-gradient(180deg,#cdd9dd 0%,#8aa6ad 34%,#4d6b6e 70%,#2c4543 100%); }
.scene-forest  { background:linear-gradient(180deg,#bcd0ad 0%,#6e9466 32%,#3b6342 68%,#244a32 100%); }
.scene-desert  { background:linear-gradient(180deg,#f0d9a8 0%,#e0a85f 38%,#c47a3a 70%,#8a4f2a 100%); }
.scene-coast   { background:linear-gradient(180deg,#cfe6ea 0%,#8fc6cf 34%,#e7d6b2 64%,#d8bf90 100%); }
.scene-dusk    { background:linear-gradient(180deg,#caa9b0 0%,#9a7c93 34%,#4f5a78 68%,#243049 100%); }
.scene-night   { background:linear-gradient(180deg,#2a4357 0%,#1b3145 50%,#10212f 100%); }
.scene-grain::after { content:""; position:absolute; inset:0; opacity:.5; background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px); background-size:4px 4px; pointer-events:none; }
.scene-vignette::before { content:""; position:absolute; inset:0; background:radial-gradient(120% 100% at 50% 0%, transparent 40%, rgba(20,40,55,.4) 100%); pointer-events:none; }

/* overlay scrim for legibility */
.scrim { position:absolute; inset:0; background:linear-gradient(180deg, rgba(15,30,40,.15) 0%, rgba(15,30,40,.12) 40%, rgba(15,30,40,.62) 100%); }
.scrim-l { background:linear-gradient(90deg, rgba(13,32,46,.74) 0%, rgba(13,32,46,.4) 45%, rgba(13,32,46,.05) 100%); }
.hero .scrim, .page-hero .scrim { background:linear-gradient(180deg, rgba(13,28,38,.46) 0%, rgba(13,28,38,.34) 42%, rgba(13,28,38,.74) 100%); }

/* ---------- hero ---------- */
.hero { position:relative; min-height:92vh; display:flex; align-items:flex-end; overflow:hidden; color:#fff; margin-top:-5.5rem; padding-top:5.5rem; }
.hero-bg { position:absolute; inset:-12% 0 0 0; height:124%; will-change:transform; }
.hero-inner { position:relative; z-index:2; width:100%; padding-bottom:clamp(3rem,8vh,7rem); padding-top:7rem; }
.hero .coord { color:rgba(255,255,255,.82); }
.hero h1 { color:#fff; font-size:clamp(3rem,8vw,6.5rem); font-weight:600; letter-spacing:-.01em; max-width:16ch; margin-top:1.2rem; text-shadow:0 2px 30px rgba(10,25,35,.45); }
.hero h1 em { font-style:italic; color:#f0d9a8; }
.hero-sub { font-size:clamp(1.15rem,2vw,1.45rem); color:rgba(255,255,255,.9); max-width:46ch; margin-top:1.4rem; font-weight:400; }
.hero-cta { display:flex; flex-wrap:wrap; gap:.9rem; margin-top:2.2rem; }
.hero-scroll { position:absolute; left:50%; bottom:1.6rem; transform:translateX(-50%); z-index:2; color:rgba(255,255,255,.7); display:flex; flex-direction:column; align-items:center; gap:.5rem; font-size:.72rem; letter-spacing:.2em; text-transform:uppercase; }
.hero-scroll .m { width:24px;height:38px;border:1.5px solid rgba(255,255,255,.5); border-radius:12px; position:relative; }
.hero-scroll .m::after { content:""; position:absolute; left:50%; top:7px; width:3px;height:7px; background:#fff; border-radius:2px; transform:translateX(-50%); animation:scrolld 1.8s var(--ease) infinite; }
@keyframes scrolld { 0%{opacity:0;transform:translate(-50%,0);} 40%{opacity:1;} 80%{opacity:0;transform:translate(-50%,12px);} }
@media (prefers-reduced-motion: reduce){ .hero-scroll .m::after{ animation:none; } }

/* page hero (interior, shorter cinematic) */
.page-hero { position:relative; min-height:62vh; display:flex; align-items:flex-end; overflow:hidden; color:#fff; }
.page-hero .hero-bg { position:absolute; inset:-12% 0 0 0; height:124%; }
.page-hero-inner { position:relative; z-index:2; width:100%; padding-bottom:clamp(2.4rem,6vh,4.5rem); padding-top:6rem; }
.page-hero .crumbs { color:rgba(255,255,255,.78); }
.page-hero h1 { color:#fff; font-size:clamp(2.6rem,6vw,5rem); font-weight:600; max-width:18ch; margin-top:1rem; text-shadow:0 2px 24px rgba(10,25,35,.45); }
.page-hero .lede { font-size:clamp(1.1rem,1.8vw,1.3rem); color:rgba(255,255,255,.9); max-width:54ch; margin-top:1.1rem; }
.page-hero .hero-meta { display:flex; flex-wrap:wrap; gap:1.4rem; margin-top:1.6rem; }
.page-hero .hero-meta .coord { color:rgba(255,255,255,.85); }

.crumbs { display:flex; gap:.5rem; align-items:center; font-size:.82rem; font-weight:500; letter-spacing:.04em; }
.crumbs a:hover { text-decoration:underline; } .crumbs .sep{ opacity:.5; }

/* ---------- prose ---------- */
.prose { max-width:740px; }
.prose.wide { max-width:840px; }
.prose p { color:var(--ink-soft); margin-top:1.15rem; font-size:1.08rem; }
.prose p.lead { font-size:1.3rem; color:var(--ink); font-family:var(--display); font-style:italic; line-height:1.45; }
.prose h2 { font-size:clamp(1.8rem,3.6vw,2.5rem); margin-top:2.8rem; }
.prose h3 { font-size:1.45rem; margin-top:2rem; }
.prose a.inline { color:var(--ocean-deep); font-weight:600; text-decoration:underline; text-decoration-color:var(--sand-deep); text-underline-offset:3px; }
.prose ul.ticks { margin-top:1.1rem; display:grid; gap:.7rem; }
.prose ul.ticks li { position:relative; padding-left:1.9rem; color:var(--ink-soft); font-size:1.05rem; }
.prose ul.ticks li::before { content:""; position:absolute; left:0; top:.45em; width:12px;height:12px; border-radius:50%; background:var(--forest-tint); border:2px solid var(--forest); }
.prose blockquote { margin:2rem 0; padding-left:1.5rem; border-left:3px solid var(--sun); font-family:var(--display); font-style:italic; font-size:1.5rem; color:var(--ink); line-height:1.4; }
.prose .note-box { background:var(--sun-soft); border:1px solid rgba(207,138,60,.3); border-radius:var(--radius-lg); padding:1.3rem 1.5rem; margin-top:1.8rem; }
.prose .note-box strong{ color:var(--ink); } .prose .note-box p{ color:var(--ink-soft); margin-top:.3rem; font-size:1rem; }
.last-updated { font-size:.86rem; color:var(--muted); margin-top:.6rem; font-weight:500; }

.content-layout { display:grid; grid-template-columns:1fr 320px; gap:var(--s-6); align-items:start; }
.sidebar { position:sticky; top:100px; display:grid; gap:1.3rem; }

/* reveal + back-to-top + skip */
[data-reveal]{ opacity:0; transform:translateY(24px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].in{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ [data-reveal]{ opacity:1; transform:none; transition:none; } .hero-bg{ transform:none !important; } }
.to-top { position:fixed; right:1.5rem; bottom:1.5rem; z-index:60; width:48px;height:48px;border-radius:50%; background:var(--ink); color:#fff; display:grid;place-items:center; box-shadow:var(--shadow-lg); opacity:0; visibility:hidden; transform:translateY(12px); transition:.3s var(--ease); }
.to-top.show{ opacity:1; visibility:visible; transform:none; } .to-top:hover{ background:var(--ocean); } .to-top svg{ width:20px;height:20px; }
.skip { position:absolute; left:1rem; top:-60px; background:var(--ink); color:#fff; padding:.7rem 1.2rem; border-radius:8px; z-index:100; transition:top .25s; }
.skip:focus { top:1rem; }

/* ---------- footer ---------- */
.site-footer { position:relative; background:linear-gradient(175deg,#1b2a2e 0%,#142530 55%,#0f1e28 100%); color:rgba(255,255,255,.72); margin-top:0; overflow:hidden; }
.site-footer .topo { position:absolute; inset:0; opacity:.05; pointer-events:none; }
.footer-accent { position:absolute; top:0; left:0; right:0; height:3px; background:linear-gradient(90deg,var(--sun) 0%,var(--ocean) 45%,var(--forest) 100%); opacity:.85; }
.footer-shell { position:relative; z-index:1; }
.footer-top { position:relative; display:grid; grid-template-columns:1.4fr 1fr 1fr 1.15fr; gap:var(--s-5); padding-block:var(--s-7) var(--s-5); }
.footer-cta {
  position:relative; margin-block:var(--s-5) var(--s-6);
  padding:clamp(2.2rem,4.5vw,3.4rem);
  text-align:center; border-radius:var(--radius-xl);
  background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.1);
  overflow:hidden;
}
.footer-cta::before {
  content:""; position:absolute; inset:0;
  background:radial-gradient(ellipse 80% 60% at 50% 0%, rgba(207,138,60,.12) 0%, transparent 70%);
  pointer-events:none;
}
.footer-cta > * { position:relative; z-index:1; }
.footer-cta h2 { color:#fff; font-size:clamp(2rem,4.5vw,3.2rem); max-width:18ch; margin-inline:auto; }
.footer-cta p { color:rgba(255,255,255,.7); max-width:48ch; margin:1rem auto 0; }
.footer-cta .btn-row { display:flex; gap:1rem; justify-content:center; flex-wrap:wrap; margin-top:2rem; }
.footer-brand .brand-name { color:#fff; }
.footer-blurb { margin-top:1.1rem; font-size:.96rem; max-width:36ch; color:rgba(255,255,255,.64); }
.footer-disclaimer { margin-top:1.2rem; font-size:.8rem; color:rgba(255,255,255,.46); max-width:46ch; line-height:1.55; }
.footer-col h4 { color:#fff; font-family:var(--body); font-weight:600; font-size:.74rem; letter-spacing:.18em; text-transform:uppercase; margin-bottom:1rem; }
.footer-col a { display:block; padding:.32rem 0; font-size:.95rem; color:rgba(255,255,255,.66); transition:color .2s; }
.footer-col a:hover { color:#f0d9a8; }
.footer-contact div { font-size:.92rem; margin-bottom:.55rem; color:rgba(255,255,255,.66); }
.footer-contact strong { color:#fff; display:block; font-weight:600; }
.footer-bottom { position:relative; border-top:1px solid rgba(255,255,255,.1); padding-block:1.5rem; display:flex; flex-wrap:wrap; gap:1rem; justify-content:space-between; align-items:center; font-size:.85rem; }
.footer-bottom .legal { display:flex; gap:1.4rem; flex-wrap:wrap; }
.footer-bottom a:hover { color:#f0d9a8; }