/* Alpine Advisory AI: shared site styles (Summit design system, October 2026).
   Every page links this file, then adds its own section styles inline. */

:root {
  --paper: #FFFFFF;
  --tint: #F3F6F5; /* glacier paper: hero backgrounds only */
  --paper-2: #E8EEEC;
  --paper-3: #DCE5E2;
  --surface: #FFFFFF;
  --ink: #0C1A23;
  --ink-2: #16262F;
  --ink-3: #20333D;
  --text: #2B3B44;
  --muted: #5B6B73;
  --line: #CFDAD7;
  --line-soft: #E1E8E6;
  --teal: #0F766E;
  --teal-2: #0D9488;
  --teal-bright: #2CC6B0;
  --mint: #3DD9A0;
  --teal-wash: #E1F0EC;
  --on-dark: #EDF3F1;
  --muted-dark: #9DB0B3;
  --line-dark: #2A3E48;
  --star: #E8B64C;
  --danger: #B42318;

  --f-display: 'Geist', 'Helvetica Neue', Arial, sans-serif;
  --f-body: 'Geist', 'Helvetica Neue', Arial, sans-serif;
  --f-serif: 'Newsreader', Georgia, serif;
  --display-weight: 500;
  --display-tracking: -0.045em;
  --display-leading: 1.02;
  --h-weight: 500;
  --h-tracking: -0.035em;

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 18px;
  --radius-pill: 999px;

  --fs-display: clamp(2.5rem, 4.4vw, 4.6rem);
  --fs-h1: clamp(2.25rem, 3.7vw, 3.8rem);
  --fs-h2: clamp(1.9rem, 2.9vw, 2.9rem);
  --fs-h3: clamp(1.3rem, 1.7vw, 1.6rem);
  --fs-h4: 1.1875rem;
  --fs-lead: clamp(1.125rem, 1.35vw, 1.3125rem);
  --fs-body: 1.0625rem;
  --fs-small: .9375rem;
  --fs-micro: .8125rem;

  --gutter: clamp(20px, 4vw, 56px);
  --max: 1240px;
  --max-text: 38rem;
  --section-y: clamp(80px, 8.5vw, 136px);
  --nav-h: 80px;
  --ease: cubic-bezier(.2, .7, .1, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-size-adjust: 100%; scroll-padding-top: 76px; }
body { font: 400 var(--fs-body)/1.65 var(--f-body); color: var(--text); background: var(--paper); }
img, svg, canvas, video { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: .22em; text-decoration-thickness: 1px; }
button, input, select, textarea, summary { font: inherit; color: inherit; }
button, summary { cursor: pointer; }
:focus-visible { outline: 2px solid var(--teal-2); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--teal-wash); color: var(--ink); }
h1, h2, h3, h4 { font-family: var(--f-display); color: var(--ink); font-weight: var(--h-weight); letter-spacing: var(--h-tracking); line-height: 1.12; text-wrap: balance; }
p { text-wrap: pretty; }
[hidden] { display: none !important; }

.t-display { font: var(--display-weight) var(--fs-display)/var(--display-leading) var(--f-display); letter-spacing: var(--display-tracking); color: var(--ink); text-wrap: balance; }
.t-h1 { font: var(--display-weight) var(--fs-h1)/1.05 var(--f-display); letter-spacing: var(--display-tracking); color: var(--ink); text-wrap: balance; }
.t-h2 { font: var(--h-weight) var(--fs-h2)/1.1 var(--f-display); letter-spacing: var(--h-tracking); color: var(--ink); text-wrap: balance; }
.t-h3 { font: var(--h-weight) var(--fs-h3)/1.25 var(--f-display); letter-spacing: -.02em; color: var(--ink); }
.t-lead { font-size: var(--fs-lead); line-height: 1.6; color: var(--text); max-width: var(--max-text); }
.t-small { font-size: var(--fs-small); }
.t-micro { font-size: var(--fs-micro); color: var(--muted); }
.on-dark { color: var(--muted-dark); }
.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4, .on-dark .t-display, .on-dark .t-h1, .on-dark .t-h2, .on-dark .t-h3 { color: var(--on-dark); }

.wrap { width: calc(100% - var(--gutter) * 2); max-width: var(--max); margin-inline: auto; }
.s-label { display: flex; align-items: center; gap: 12px; font-size: var(--fs-small); font-weight: 500; color: var(--teal); margin-bottom: 14px; }
.s-label::before { content: ''; flex: 0 0 24px; height: 1px; background: currentColor; }
.on-dark .s-label { color: var(--teal-bright); }
.text-link { font-size: var(--fs-small); color: var(--ink); }
.on-dark .text-link { color: var(--on-dark); }

.skip-link { position: fixed; left: 16px; top: 10px; z-index: 300; padding: 10px 16px; border-radius: var(--radius-s); background: var(--ink); color: #fff; transform: translateY(-160%); }
.skip-link:focus { transform: none; }

/* Full-screen sections: on laptops and desktops each main section fills one screen, content centred,
   so you never see a sliver of the next section. Compact bands (tool strip, quotes) don't use it. */
@media (min-width: 861px) and (min-height: 600px) {
  .screen { min-height: min(100svh, 1100px); display: flex; flex-direction: column; justify-content: center; }
}

/* Glacier tint lives on each page's hero only; every section below is white. */
body .is-tint { --paper: var(--tint); background: var(--tint); }
main > section + section { border-top: 1px solid var(--line-soft); }

/* Faint contour texture in a section corner (brand signature, used sparingly). */
.has-map { position: relative; isolation: isolate; overflow: hidden; }
.sec-map { position: absolute; top: 0; right: 0; bottom: 0; width: 46%; z-index: -1; pointer-events: none; -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 60%); mask-image: linear-gradient(90deg, transparent 0%, #000 60%); }
.sec-map canvas { color: color-mix(in srgb, var(--teal) 16%, transparent); --contour-strong: color-mix(in srgb, var(--teal) 34%, transparent); }
@media (max-width: 860px) { .sec-map { width: 100%; height: 40%; top: auto; -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 70%); mask-image: linear-gradient(180deg, transparent 0%, #000 70%); } }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .6em; min-height: 48px; padding: 0 1.4em; border-radius: var(--radius-s); border: 1px solid transparent; font: 500 1rem/1 var(--f-body); text-decoration: none; white-space: nowrap; cursor: pointer; transition: background .2s, color .2s, border-color .2s; }
.btn--primary { background: var(--teal); color: #fff; }
.btn--primary:hover { background: var(--ink); }
.on-dark .btn--primary:hover { background: var(--teal-2); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); }
.on-dark .btn--ghost { border-color: var(--line-dark); color: var(--on-dark); }
.on-dark .btn--ghost:hover { border-color: var(--on-dark); }
.btn--light { background: var(--on-dark); color: var(--ink); }
.btn--light:hover { background: #fff; }
.btn-arrow { width: 1em; height: 1em; transition: transform .2s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* Tick and cross marks: outlined circles, never tinted tiles */
.mark-check, .mark-cross { flex: 0 0 auto; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; margin-top: 2px; background: var(--surface); border: 1px solid var(--line); color: var(--ink); }
.mark-cross { color: var(--muted); }
.mark-check svg, .mark-cross svg { width: 11px; height: 11px; }
.on-dark .mark-check { background: transparent; border-color: color-mix(in srgb, var(--teal-bright) 55%, transparent); color: var(--teal-bright); }
.on-dark .mark-cross { background: transparent; border-color: var(--line-dark); color: var(--muted-dark); }

/* Icons in outlined white circles */
.icon-circle { flex: 0 0 auto; width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--line); color: var(--ink); }
.icon-circle svg { width: 20px; height: 20px; }

/* Live contour maps. Colour comes from CSS `color`; index lines from --contour-strong. */
canvas[data-contours] { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--line); }

/* =========================================================
   Header: hairline bar with a Services panel
   ========================================================= */
.site-head { position: fixed; top: 0; left: 0; right: 0; z-index: 100; }
.site-head-shell { position: relative; border-bottom: 1px solid color-mix(in srgb, var(--ink) 11%, transparent); transition: background .35s, border-color .35s; }
.site-head.is-scrolled .site-head-shell { background: color-mix(in srgb, var(--paper) 86%, transparent); -webkit-backdrop-filter: blur(14px) saturate(1.3); backdrop-filter: blur(14px) saturate(1.3); border-color: var(--line); }
.site-head.is-solid .site-head-shell { background: var(--paper); }
.site-head.is-panel .site-head-shell { background: var(--surface); border-color: var(--line); }
.site-bar { display: flex; align-items: stretch; gap: 44px; height: var(--nav-h); transition: height .45s var(--ease); }
.site-head.is-scrolled .site-bar { height: 62px; }
.site-logo { display: flex; align-items: center; flex: 0 0 auto; }
.site-logo img { height: 22px; width: auto; transition: height .45s var(--ease); }
.site-head.is-scrolled .site-logo img { height: 19px; }
.site-links { display: flex; align-items: stretch; gap: 30px; }
.site-link { position: relative; display: inline-flex; align-items: center; gap: 7px; border: 0; background: none; font-size: var(--fs-small); color: var(--text); text-decoration: none; white-space: nowrap; transition: color .2s; }
.site-link:hover, .site-link[aria-expanded="true"], .site-link[aria-current="page"] { color: var(--ink); }
.site-link::after { content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--teal); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease); }
.site-link[aria-expanded="true"]::after, .site-link:hover::after, .site-link[aria-current="page"]::after { transform: scaleX(1); }
.site-chev { width: 12px; height: 12px; transition: transform .25s var(--ease); }
[aria-expanded="true"] > .site-chev { transform: rotate(180deg); }
.site-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.site-right .btn { min-height: 44px; font-size: var(--fs-small); }
.site-head.is-scrolled .site-right .btn { min-height: 40px; }
.site-burger { display: none; position: relative; width: 44px; height: 44px; border: 0; background: none; border-radius: var(--radius-s); }
.site-burger span { position: absolute; left: 12px; right: 12px; height: 1.5px; background: var(--ink); border-radius: 2px; transition: transform .3s var(--ease), top .3s var(--ease); }
.site-burger span:nth-child(1) { top: 17px; }
.site-burger span:nth-child(2) { top: 25px; }
.site-burger[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.site-burger[aria-expanded="true"] span:nth-child(2) { top: 21px; transform: rotate(-45deg); }

.site-panel { position: absolute; top: 100%; left: 0; right: 0; margin-top: 1px; background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: 0 40px 60px -40px color-mix(in srgb, var(--ink) 30%, transparent); opacity: 0; visibility: hidden; transform: translateY(-6px); transition: opacity .25s, transform .35s var(--ease), visibility .25s; }
.site-panel.is-open { opacity: 1; visibility: visible; transform: none; }
.site-panel-in { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(0, .95fr); padding: 28px 0 32px; }
.site-svc { display: block; padding: 0 22px; border-left: 1px solid var(--line-soft); text-decoration: none; }
.site-svc:first-child { padding-left: 0; border-left: 0; }
.site-thumb { position: relative; display: block; height: 96px; margin-bottom: 16px; border-radius: var(--radius-m); background: var(--tint); overflow: hidden; box-shadow: inset 0 0 0 1px var(--line-soft); transition: box-shadow .25s; }
.site-thumb canvas { color: color-mix(in srgb, var(--ink) 16%, transparent); --contour-strong: color-mix(in srgb, var(--teal) 60%, transparent); }
.site-thumb i { position: absolute; width: 8px; height: 8px; margin: -4px 0 0 -4px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px color-mix(in srgb, var(--teal) 16%, transparent); }
.site-svc:hover .site-thumb { box-shadow: inset 0 0 0 1px var(--teal); }
.site-step { display: block; font-size: var(--fs-micro); color: var(--muted); margin-bottom: 4px; }
.site-svc b { display: block; font: var(--h-weight) var(--fs-h4)/1.25 var(--f-display); letter-spacing: -.02em; color: var(--ink); margin-bottom: 6px; }
.site-svc:hover b { text-decoration: underline; text-underline-offset: .2em; text-decoration-thickness: 1px; }
.site-desc { display: block; font-size: var(--fs-micro); line-height: 1.5; color: var(--text); }
.site-aside { margin-left: 22px; padding: 22px; border-radius: var(--radius-m); background: var(--tint); display: flex; flex-direction: column; align-items: flex-start; }
.site-aside-k { font: var(--h-weight) var(--fs-h4)/1.25 var(--f-display); letter-spacing: -.02em; color: var(--ink); }
.site-aside p + p { font-size: var(--fs-small); color: var(--muted); margin-bottom: 18px; }
.site-aside .btn { width: 100%; margin-top: auto; }
.site-aside .text-link { margin-top: 12px; font-size: var(--fs-micro); }
.site-menu { display: none; }

@media (max-width: 860px) {
  :root { --nav-h: 60px; }
  .site-bar, .site-head.is-scrolled .site-bar { height: 60px; gap: 8px; }
  .site-bar.wrap { width: calc(100% - 24px); }
  .site-logo img, .site-head.is-scrolled .site-logo img { height: 13px; }
  .site-links, .site-panel { display: none; }
  .site-right { gap: 2px; }
  .site-right .btn, .site-head.is-scrolled .site-right .btn { min-height: 38px; padding: 0 12px; font-size: var(--fs-micro); }
  .site-burger { display: block; }
  .site-head-shell { background: color-mix(in srgb, var(--paper) 88%, transparent); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
  .site-head.is-menu .site-head-shell { background: var(--paper); }
  .site-menu { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; margin-top: 1px; height: calc(100svh - 61px); overflow-y: auto; padding: 8px 20px 20px; background: var(--paper); opacity: 0; visibility: hidden; transition: opacity .25s, visibility .25s; }
  .site-menu.is-open { opacity: 1; visibility: visible; }
  .site-menu-k { font-size: var(--fs-micro); color: var(--muted); padding: 14px 0 6px; }
  .site-menu-svc { display: grid; grid-template-columns: 40px 1fr; gap: 2px 14px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line-soft); text-decoration: none; }
  .site-menu-svc .site-thumb { grid-row: span 2; height: 40px; margin: 0; border-radius: var(--radius-s); }
  .site-menu-svc .site-thumb i { width: 6px; height: 6px; margin: -3px 0 0 -3px; box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal) 16%, transparent); }
  .site-menu-svc b { font: var(--h-weight) var(--fs-body)/1.25 var(--f-display); letter-spacing: -.01em; color: var(--ink); align-self: end; }
  .site-menu-svc span:last-child { font-size: var(--fs-micro); color: var(--muted); line-height: 1.35; align-self: start; }
  .site-menu-main { margin-top: 10px; }
  .site-menu-main a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line-soft); text-decoration: none; font: var(--h-weight) 1.375rem/1.2 var(--f-display); letter-spacing: var(--h-tracking); color: var(--ink); }
  .site-menu-foot { margin-top: auto; padding-top: 24px; }
  .site-menu-foot .btn { width: 100%; }
}
@media (max-width: 400px) {
  .site-logo img, .site-head.is-scrolled .site-logo img { height: 12px; }
  .site-right .btn, .site-head.is-scrolled .site-right .btn { padding: 0 10px; }
  .site-burger { width: 40px; }
  .site-burger span { left: 10px; right: 10px; }
}
@media (max-width: 360px) { .site-right .btn { display: none; } }
body.is-locked { overflow: hidden; }

/* =========================================================
   Footer: contour sign-off
   ========================================================= */
.site-foot { background: var(--ink); color: var(--muted-dark); padding-top: clamp(64px, 9vh, 96px); overflow: hidden; }
.site-foot-top { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 40px 24px; padding-bottom: clamp(48px, 7vh, 72px); }
.site-foot-brand { grid-column: 1 / span 4; }
.site-foot-tag { font: var(--h-weight) var(--fs-h3)/1.3 var(--f-display); letter-spacing: -.02em; color: var(--on-dark); max-width: 22ch; margin-bottom: 28px; text-wrap: balance; }
.site-foot-cols { grid-column: 6 / span 7; display: grid; grid-template-columns: 1fr .8fr 1.25fr; gap: 24px; }
.foot-k { font-size: var(--fs-micro); margin-bottom: 14px; color: color-mix(in srgb, var(--muted-dark) 80%, transparent); }
.foot-list { list-style: none; display: grid; gap: 9px; font-size: var(--fs-small); line-height: 1.4; }
.foot-list a { color: var(--on-dark); text-decoration: none; }
.foot-list a:hover { text-decoration: underline; }
.site-foot-word { position: relative; width: 100%; aspect-ratio: 2496 / 175; -webkit-mask: url('../brand/alpine-logo-white.png') left center / 100% 100% no-repeat; mask: url('../brand/alpine-logo-white.png') left center / 100% 100% no-repeat; background: color-mix(in srgb, var(--on-dark) 17%, transparent); }
.site-foot-word canvas { color: color-mix(in srgb, var(--teal-bright) 70%, transparent); --contour-strong: var(--mint); }
.site-foot-legal { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 28px; margin-top: clamp(28px, 4vh, 44px); padding: 22px 0 28px; border-top: 1px solid var(--line-dark); font-size: var(--fs-micro); }
.site-foot-legal nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.site-foot-legal a { text-decoration: none; }
.site-foot-legal a:hover { color: var(--on-dark); text-decoration: underline; }
@media (max-width: 960px) { .site-foot-brand, .site-foot-cols { grid-column: 1 / -1; } }
@media (max-width: 640px) {
  .site-foot-cols { grid-template-columns: 1fr 1fr; gap: 32px 20px; }
  .site-foot-cols > div:last-child { grid-column: 1 / -1; }
  .site-foot-tag { font-size: 1.375rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}
@media print {
  .site-head, .site-menu, .site-panel { display: none !important; }
}