/* UI-02: offline landing + authentication, incremental over UI-01. */
.landing-page--ui02 {
  gap: clamp(1.2rem, 3vw, 2.4rem);
}
.landing-page--ui02 .landing-topbar {
  position: relative;
  padding: .8rem clamp(1rem, 2.2vw, 1.8rem);
  gap: 1rem;
  background: var(--surface-card);
}
.landing-page--ui02 .landing-topbar__brand { flex: 0 1 auto; min-width: 0; }
.landing-page--ui02 .landing-topbar__actions { align-items: center; }
.landing-page--ui02 .landing-topbar__actions .primary-button,
.landing-page--ui02 .landing-topbar__actions .secondary-button { min-height: 2.8rem; padding: .6rem 1rem; }
.ui02-nav { display: flex; gap: .35rem; align-items: center; }
.ui02-nav__link {
  min-height: 2.8rem; padding: .45rem .85rem; background: transparent;
  color: var(--text-primary); border: 1px solid transparent;
  border-radius: var(--radius-control); font: inherit; font-weight: 650;
  cursor: pointer;
}
.ui02-nav__link:hover, .ui02-nav__link:focus-visible {
  background: var(--interactive-hover-surface); border-color: var(--border-default);
}
.landing-hero--ui02 {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center; overflow: hidden;
  min-height: 29rem;
  padding: clamp(1.4rem, 4vw, 3.7rem);
  background: var(--surface-card);
  box-shadow: var(--shadow-soft);
}
.landing-hero--ui02 .landing-hero__copy { gap: 1.2rem; align-content: center; }
.landing-hero--ui02 h1 {
  max-width: 15ch; font-size: clamp(2.25rem, 4.7vw, 4.5rem);
  line-height: 1.08; letter-spacing: -.038em; color: var(--text-primary);
}
.landing-hero--ui02 .lead { color: var(--text-secondary); line-height: 1.65; }
.ui02-kicker {
  display: inline-flex; width: fit-content; align-items: center; gap: .6rem;
  color: var(--text-primary); font-size: .8rem; font-weight: 800;
  letter-spacing: .06em; text-transform: uppercase;
}
.ui02-kicker__dot { display: block; width: .6rem; height: .6rem; border-radius: 50%; background: var(--brand-orange-500); }
.ui02-button--hero { min-height: 3.2rem; }
.ui02-button--emergency {
  border: 2px solid var(--emergency-accent, #cc5757) !important;
  color: var(--text-danger, #b53b3b) !important;
  background: var(--emergency-bg, rgba(255, 231, 231, 0.72)) !important;
  font-weight: 750;
}
.ui02-button--emergency:hover, .ui02-button--emergency:focus-visible {
  background: rgba(220, 53, 69, 0.18) !important;
  border-color: #b53b3b !important;
}
.emergency-disclaimer-note {
  font-size: 0.8rem;
  color: var(--text-danger, #b53b3b);
  background: var(--emergency-bg, rgba(255, 231, 231, 0.72));
  border: 1px solid var(--emergency-border, rgba(181, 59, 59, 0.22));
  border-radius: var(--radius-sm, 12px);
  padding: 0.6rem 0.8rem;
  line-height: 1.45;
  margin-bottom: 0.75rem;
}
.ui02-hero-note { color: var(--text-secondary); font-size: .83rem; line-height: 1.5; }
.ui02-hero-visual {
  display: grid; justify-items: center; align-content: center; gap: 1.4rem;
  position: relative; isolation: isolate;
  min-height: 23rem; padding: 1.5rem 1rem;
  border: 1px solid var(--border-default); border-radius: clamp(1.2rem, 2.4vw, 2rem);
  background: radial-gradient(circle at 50% 38%, rgba(244,119,33,.15), transparent 62%),
              radial-gradient(circle at 50% 65%, rgba(37,99,174,.18), transparent 72%),
              var(--surface-card-muted);
}
.ui02-hero-visual::before {
  content: ''; position: absolute; inset: 12% 18%; z-index: -1;
  border: 1px dashed var(--border-strong); border-radius: 50%; transform: scaleX(1.07);
}
.ui02-hero-visual__mark { width: clamp(5.5rem, 13vw, 9rem); height: 10rem; object-fit: contain; filter: drop-shadow(0 10px 20px rgba(7,27,61,.15)); }
.ui02-network-flow { display: flex; width: 100%; align-items: center; justify-content: center; gap: .25rem; }
.ui02-network-flow__endpoint, .ui02-network-flow__node {
  flex-shrink: 1; min-width: 0; padding: .5rem .45rem;
  border: 1px solid var(--border-strong); border-radius: .6rem;
  background: var(--surface-card); color: var(--text-primary); font-weight: 750;
  text-align: center; font-size: clamp(.65rem, .8vw, .85rem);
}
.ui02-network-flow__node { border-color: var(--brand-orange-500); }
.ui02-network-flow__line { min-width: .4rem; flex: 1 1 1rem; height: 2px; background: var(--brand-navy-800); }
.ui02-network-flow__line--radio { background: var(--brand-orange-500); border-top: 1px dashed var(--brand-orange-500); }
.ui02-network-flow__legend { color: var(--text-secondary); font-size: .82rem; letter-spacing: .08em; }
.ui02-section { display: grid; gap: 1.5rem; scroll-margin-top: 1rem; }
.ui02-section-heading { display: grid; gap: .45rem; max-width: 43rem; }
.ui02-section-heading h2 { color: var(--text-primary); font-size: clamp(1.7rem, 2.8vw, 2.5rem); line-height: 1.18; }
.ui02-section-heading p:last-child { color: var(--text-secondary); }
.ui02-steps { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1rem; }
.ui02-step { display: grid; align-content: start; gap: .7rem; padding: clamp(1.25rem,2.5vw,2rem); }
.ui02-step h3, .ui02-use-case h3 { color: var(--text-primary); font-size: 1.12rem; }
.ui02-step p, .ui02-use-case p, .ui02-capability p { color: var(--text-secondary); line-height: 1.55; }
.ui02-step__number { color: var(--brand-orange-500); font-size: 1.55rem; font-weight: 850; }
.ui02-use-case-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 1rem; }
.ui02-use-case { min-width: 0; overflow: hidden; padding: 0; }
.ui02-use-case img { display: block; width: 100%; height: clamp(10rem, 14vw, 13rem); object-fit: cover; object-position: center; }
.ui02-use-case__copy { display: grid; gap: .7rem; padding: 1.15rem; }
.ui02-capabilities__grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.ui02-capability { display: grid; align-content: start; gap: .7rem; padding: 1.35rem; border-left: 3px solid var(--brand-navy-800); }
.ui02-capability + .ui02-capability { border-left-color: var(--brand-orange-500); }
.ui02-capability__label { color: var(--text-primary); font-weight: 800; }

/* Auth: clear hierarchy, reliable statuses, form-first on mobile. */
.app-shell--auth .shell-header { gap: 1rem; }
.auth-panel--ui02 { max-width: min(74rem, 100%); gap: 1.1rem; padding: clamp(.7rem, 2vw, 1.4rem); }
.auth-panel--ui02 .auth-hero { padding: clamp(1rem, 2vw, 1.7rem); background: var(--surface-card-muted); box-shadow: none; }
.auth-panel--ui02 .auth-hero__brand { align-items: center; }
.auth-panel--ui02 .auth-hero__copy h1 { font-size: clamp(1.65rem, 3vw, 2.5rem); }
.auth-panel--ui02 .auth-hero__copy .lead { max-width: 40rem; }
.auth-panel--ui02 .auth-hero__meta { grid-template-columns: repeat(2,minmax(0,1fr)); }
.auth-panel--ui02 .auth-layout { grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: clamp(1rem,2vw,2rem); }
.auth-panel--ui02 .auth-side-panel { align-content: start; }
.auth-panel--ui02 .auth-form-panel { padding: clamp(1.2rem,2vw,2rem); border: 1px solid var(--border-default); }
.auth-panel--ui02 .auth-form-panel__header h2 { font-size: clamp(1.3rem,2vw,1.8rem); }
.ui02-local-account-note {
  padding: .75rem 1rem; border-left: 3px solid var(--brand-orange-500);
  border-radius: .5rem; background: var(--surface-card-muted);
  color: var(--text-secondary); line-height: 1.45; font-size: .9rem;
}
.auth-panel--ui02 .field-label { font-weight: 750; }
.auth-panel--ui02 .text-input { min-width: 0; width: 100%; min-height: 3rem; }
.auth-panel--ui02 .text-input[aria-invalid="true"] { border-color: var(--text-danger); }
.ui02-password-field { display: flex; width: 100%; align-items: stretch; position: relative; }
.ui02-password-field .text-input { padding-right: 8.5rem; }
.ui02-password-toggle {
  position: absolute; right: .4rem; top: 50%; transform: translateY(-50%);
  min-height: 2.25rem; padding: .25rem .45rem;
  color: var(--text-primary); background: var(--surface-card-muted);
  border: 1px solid var(--border-default); border-radius: .5rem;
  font: inherit; font-size: .79rem; font-weight: 750; cursor: pointer;
}
.ui02-field-error { color: var(--text-danger); font-size: .84rem; line-height: 1.4; }
.ui02-field-error:empty { display: none; }
.ui02-role-notice { font-size: .85rem; }
.auth-panel--ui02 .auth-submit { min-height: 3.1rem; }
@media (max-width: 1050px) {
  .landing-page--ui02 .landing-topbar { flex-wrap: wrap; }
  .ui02-use-case-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 900px) {
  .landing-hero--ui02 { grid-template-columns: 1fr; }
  .ui02-hero-visual { min-height: 17rem; }
  .auth-panel--ui02 .auth-layout { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .landing-page--ui02 .landing-topbar { align-items: stretch; }
  .landing-page--ui02 .landing-topbar__brand { align-items: center; }
  .ui02-nav { justify-content: space-between; }
  .landing-page--ui02 .landing-topbar__actions { display: flex; flex-wrap: wrap; }
  .landing-page--ui02 .landing-topbar__actions .primary-button,
  .landing-page--ui02 .landing-topbar__actions .secondary-button { flex: 1 1 7rem; }
  .landing-hero--ui02 { padding: 1.25rem; min-height: 0; }
  .landing-hero--ui02 h1 { font-size: clamp(2rem,8vw,3rem); }
  .ui02-hero-visual { padding: 1.1rem .6rem; min-height: 14rem; }
  .ui02-network-flow__endpoint, .ui02-network-flow__node { font-size: .63rem; }
  .ui02-steps, .ui02-capabilities__grid { grid-template-columns: 1fr; }
  .ui02-use-case-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: .65rem; }
  .ui02-use-case img { height: 8.8rem; }
  .ui02-use-case__copy { padding: .85rem; }
  .ui02-use-case h3 { font-size: .94rem; }
  .auth-panel--ui02 .auth-hero__meta { grid-template-columns: 1fr; }
  .auth-panel--ui02 .auth-form-panel { padding: 1.1rem; }
  .auth-panel--ui02 .auth-layout { display: flex; flex-direction: column; }
  .auth-panel--ui02 .auth-form-panel { order: 0; width: 100%; }
  .auth-panel--ui02 .auth-side-panel { order: 1; width: 100%; }
}
@media (max-width: 370px) {
  .ui02-use-case-grid { grid-template-columns: 1fr; }
  .ui02-use-case img { height: 10rem; }
  .ui02-network-flow__endpoint, .ui02-network-flow__node { padding: .4rem .23rem; font-size: .59rem; }
}