/* Layout: container, sections, grids, header, footer, portal shell */
/* Max-width includes the gutters so content edges line up with the floating header bar */
.container { width: 100%; max-width: calc(var(--container-max) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { max-width: calc(var(--container-narrow) + var(--gutter) * 2); }

.section { padding-block: var(--section-pad); }
.section--alt { background: var(--color-surface-alt); }
.section--surface { background: var(--color-surface); }
.section--tight { padding-block: var(--space-8); }
.section--flush-top { padding-top: 0; }

.section-heading { max-width: 640px; margin-bottom: var(--space-7); }
.section-heading--center { margin-inline: auto; text-align: center; }
.section-heading--split {
  max-width: none; display: flex; flex-wrap: wrap; align-items: end;
  justify-content: space-between; gap: var(--space-4);
}
.section-heading--split > div { max-width: 640px; }
.section-heading p { color: var(--color-text-muted); margin: 0; font-size: var(--fs-md); }
.section-heading h2 { margin-bottom: var(--space-3); }

.grid { display: grid; gap: var(--space-4); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); }
.split { display: grid; gap: var(--space-7); align-items: center; }
@media (min-width: 1024px) {
  .split { grid-template-columns: 1fr 1fr; gap: var(--space-9); }
}
.stack > * + * { margin-top: var(--space-4); }

/* ---------- Header: floating glass bar ---------- */
.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  padding: var(--space-3) var(--gutter);
}
.site-header__bar {
  max-width: var(--container-max); margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  min-height: 60px; padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.72); backdrop-filter: saturate(1.6) blur(16px); -webkit-backdrop-filter: saturate(1.6) blur(16px);
  border: 1px solid rgba(10, 10, 10, 0.06); border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md); position: relative;
}
.brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); min-width: 0; }
.brand img { width: 36px; height: 36px; flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand__name { font-weight: var(--fw-semibold); font-size: var(--fs-sm); letter-spacing: -0.01em; }
.brand__sub { font-size: var(--fs-xs); color: var(--color-text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 2px; }
.main-nav a:not(.btn) {
  display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius-pill);
  color: var(--color-text-muted); text-decoration: none; font-weight: var(--fw-medium); font-size: var(--fs-sm);
  transition: color var(--dur-fast), background var(--dur-fast);
}
.main-nav a:not(.btn):hover { color: var(--color-text); background: rgba(10,10,10,0.05); }
.main-nav a[aria-current="page"]:not(.btn) { color: var(--color-text); background: rgba(10,10,10,0.06); }
.main-nav .btn { margin-left: var(--space-2); }

.nav-toggle {
  display: none; align-items: center; justify-content: center; width: 44px; height: 44px; flex: none;
  background: var(--color-text); border: 0; border-radius: 50%; color: #fff;
}
.nav-toggle__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  display: block; width: 16px; height: 1.5px; background: currentColor; position: relative; transition: transform var(--dur-base) var(--ease);
}
.nav-toggle__bars::before, .nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: absolute; left: 0; right: 0; top: calc(100% + var(--space-2));
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); display: none; max-height: calc(100vh - 110px); overflow-y: auto;
  }
  .main-nav.is-open { display: block; animation: drop var(--dur-base) var(--ease); }
  .main-nav ul { flex-direction: column; align-items: stretch; padding: var(--space-3); gap: 2px; }
  .main-nav a:not(.btn) { padding: var(--space-3) var(--space-4); font-size: var(--fs-md); color: var(--color-text); border-radius: var(--radius-md); }
  .main-nav .btn { margin: var(--space-2) 0 0; width: 100%; }
}
@keyframes drop { from { opacity: 0; transform: translateY(-6px); } }

/* ---------- Page header (interior pages) ---------- */
.page-header { padding-block: clamp(3rem, 2rem + 5vw, 6rem) clamp(2rem, 1.5rem + 3vw, 4rem); }
.page-header h1 { font-size: clamp(2.5rem, 1.6rem + 3.6vw, 4.5rem); margin-bottom: var(--space-4); max-width: 16ch; }
.page-header p { max-width: 560px; margin: 0; font-size: var(--fs-md); color: var(--color-text-muted); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-2); padding: 0; margin: 0 0 var(--space-5); font-size: var(--fs-sm); color: var(--color-text-muted); }
.breadcrumb li + li::before { content: "/"; margin-right: var(--space-2); opacity: 0.4; }
.breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-text); }
.breadcrumb [aria-current] { color: var(--color-text); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-inverse-bg); color: var(--color-inverse-muted); padding-top: var(--space-7); font-size: var(--fs-sm); border-radius: var(--radius-xl) var(--radius-xl) 0 0; }
.site-footer h2 { color: #fff; font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: var(--fw-medium); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: var(--space-4); }
.site-footer a { color: #d4d4d4; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4); padding-bottom: var(--space-7); margin-bottom: var(--space-7); border-bottom: 1px solid #262626; }
.footer-cta p { margin: 0; color: #fff; font-size: clamp(1.25rem, 1rem + 1vw, 1.75rem); font-weight: var(--fw-medium); letter-spacing: -0.02em; }
.footer-cta .btn--light { color: var(--color-text); }
.footer-display { font-size: clamp(2.25rem, 1.2rem + 4.5vw, 5rem); font-weight: var(--fw-semibold); letter-spacing: var(--tracking-display); line-height: 1; color: #fff; margin: 0 0 var(--space-8); max-width: 16ch; }
.footer-display a { color: inherit; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 8px; text-decoration-color: #3f3f3f; transition: text-decoration-color var(--dur-base); }
.footer-display a:hover { color: #fff; text-decoration-color: #fff; }
.footer-grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr 1fr; padding-bottom: var(--space-8); }
.footer-grid > :first-child { grid-column: 1 / -1; }
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.4fr; }
  .footer-grid > :first-child { grid-column: auto; }
}
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.footer-brand .brand { color: #fff; margin-bottom: var(--space-4); }
.footer-brand .brand__sub { color: var(--color-inverse-muted); }
.footer-brand p { max-width: 34ch; }
.footer-bottom { border-top: 1px solid #262626; padding-block: var(--space-5); display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: space-between; font-size: var(--fs-xs); }

/* ---------- Prototype banner ---------- */
.prototype-banner { background: var(--color-text); color: #d4d4d4; font-size: var(--fs-xs); text-align: center; padding: var(--space-2) var(--gutter); }
.prototype-banner strong { color: #fff; font-weight: var(--fw-semibold); }

/* ---------- Portal shell ---------- */
.portal-body { background: var(--color-bg); }
.portal-topbar { background: rgba(250,250,249,0.8); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: var(--z-header); }
.portal-topbar .container { max-width: var(--container-wide); display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: var(--space-4); }
.portal-topbar .brand img { width: 32px; height: 32px; }
.portal-user { display: flex; align-items: center; gap: var(--space-2); font-size: var(--fs-sm); }
.portal-shell { max-width: var(--container-wide); margin-inline: auto; padding: var(--space-5) var(--gutter) var(--space-8); display: grid; gap: var(--space-6); }
@media (min-width: 1024px) { .portal-shell { grid-template-columns: 220px minmax(0, 1fr); align-items: start; } }
.portal-sidebar ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.portal-sidebar a {
  display: flex; align-items: center; gap: var(--space-3); padding: 0.55rem var(--space-3);
  border-radius: var(--radius-md); text-decoration: none; color: var(--color-text-muted); font-size: var(--fs-sm); font-weight: var(--fw-medium);
}
.portal-sidebar a:hover { background: rgba(10,10,10,0.05); color: var(--color-text); }
.portal-sidebar a[aria-current="page"] { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--color-border); }
.portal-sidebar svg { width: 18px; height: 18px; flex: none; }
@media (min-width: 1024px) { .portal-sidebar { position: sticky; top: 84px; } }
@media (max-width: 1023px) {
  .portal-sidebar { overflow-x: auto; margin-inline: calc(var(--gutter) * -1); padding-inline: var(--gutter); scrollbar-width: none; }
  .portal-sidebar ul { display: flex; gap: var(--space-2); }
  .portal-sidebar a { white-space: nowrap; border: 1px solid var(--color-border); border-radius: var(--radius-pill); }
}
.portal-main { min-width: 0; }
.portal-page-title { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-6); }
.portal-page-title h1 { font-size: var(--fs-2xl); margin: 0; }
.portal-page-title p { margin: var(--space-2) 0 0; color: var(--color-text-muted); }

@media (max-width: 599px) {
  .portal-topbar .brand__text, .portal-user .btn--ghost:first-child { display: none; }
  .portal-user .btn span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
}
@media (max-width: 479px) {
  .site-header .brand__sub { display: none; }
}

/* ---------- Home: header is flat + full width over the hero, becomes the pill after scrolling past it ---------- */
.has-hero .site-header { position: fixed; left: 0; right: 0; top: 0; transition: padding var(--dur-slow) var(--ease); }
.site-header__bar { transition: max-width var(--dur-slow) var(--ease), border-radius var(--dur-slow) var(--ease), background var(--dur-slow), box-shadow var(--dur-slow), border-color var(--dur-slow), padding var(--dur-slow) var(--ease); }
.site-header.is-flat { padding: 0; }
.site-header.is-flat .site-header__bar {
  max-width: 100%; border-radius: 0; background: transparent; box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none;
  border-color: transparent; border-bottom-color: rgba(255, 255, 255, 0.1); min-height: 76px;
  padding-inline: max(var(--gutter), calc((100% - var(--container-max)) / 2));
}
.site-header.is-flat .brand, .site-header.is-flat .brand__sub { color: #fff; }
.site-header.is-flat .brand__sub { opacity: 0.65; }
.site-header.is-flat .main-nav a:not(.btn) { color: rgba(255, 255, 255, 0.75); }
.site-header.is-flat .main-nav a:not(.btn):hover, .site-header.is-flat .main-nav a[aria-current="page"]:not(.btn) { color: #fff; background: rgba(255, 255, 255, 0.1); }
.site-header.is-flat .main-nav .btn--primary { background: #fff; color: var(--color-text); }
.site-header.is-flat .nav-toggle { background: #fff; color: var(--color-text); }
@media (max-width: 1023px) {
  .site-header.is-flat .main-nav a:not(.btn) { color: var(--color-text); }
  .site-header.is-flat .main-nav a:not(.btn):hover, .site-header.is-flat .main-nav a[aria-current="page"]:not(.btn) { color: var(--color-text); background: rgba(10,10,10,0.06); }
  .site-header.is-flat .main-nav .btn--primary { background: var(--color-text); color: #fff; }
}

/* Frosted while scrolling over the hero (still flat + full width) */
.site-header.is-flat.is-scrolled .site-header__bar {
  background: rgba(11, 13, 18, 0.55); backdrop-filter: saturate(1.4) blur(16px); -webkit-backdrop-filter: saturate(1.4) blur(16px);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}