/* ==========================================================================
   Zerbetto Tech Hub — Core Stylesheet
   Base, layout and component styles. Breakpoint overrides live in
   responsive.css; keyframes and transition choreography live in
   animations.css. Keep selectors flat and component-scoped.
   ========================================================================== */

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* One-screen app shell: header + main + footer stack via flex and share
   the viewport height, so the hub never requires scrolling on common
   desktop sizes. If content genuinely overflows (small viewports), the
   page grows past 100vh and scrolls naturally rather than clipping. */
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-ink);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: -48px; left: var(--space-4);
  background: var(--color-ink);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: var(--z-modal);
  transition: top var(--dur-base) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); }

/* ---------- Header ---------- */
.site-header {
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand__mark { width: 48px; height: 48px; flex-shrink: 0; }

.brand__name {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--color-brand-text);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.brand__sub {
  font-size: 0.7rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-brand-text);
  opacity: 0.7;
}

/* ---------- Hero / Slider ---------- */
.hero {
  position: relative;
  flex-shrink: 0;
  height: clamp(380px, 38vh, 460px);
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(155deg, var(--color-primary) 0%, var(--color-primary-dark) 60%, #051530 100%);
}

.hero-slider { position: relative; width: 100%; height: 100%; }

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-slower) var(--ease-in-out);
}

.hero-slide.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
}

.hero-slide__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 78% 45%, var(--mockup-color) 0%, transparent 60%);
  opacity: 0.2;
  transform: scale(1);
  transition: transform 9s linear, opacity 9s linear;
}

.hero-slide.is-active .hero-slide__bg.is-kenburns {
  transform: scale(1.22);
  opacity: 0.3;
}

.hero-slide__content {
  position: relative;
  z-index: 2;
  height: 100%;
  width: 100%;
  max-width: var(--container-max);
  padding-inline: var(--space-6);
  margin-inline: auto;
  color: #fff;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.75fr);
  grid-template-rows: 100%;
  align-items: center;
  gap: var(--space-10);
}

.hero-slide__text { max-width: 500px; }

.hero-slide__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.hero-slide__subtitle {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  line-height: var(--lh-snug);
  color: rgba(255, 255, 255, 0.92);
  max-width: 440px;
}

.hero-slide__divider {
  display: block;
  width: 40px; height: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  margin-block: var(--space-3);
}

.hero-slide__desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: rgba(255, 255, 255, 0.68);
  max-width: 420px;
  margin-bottom: var(--space-5);
}

/* Document mockup (right column) */
.hero-slide__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.hero-mockup {
  position: relative;
  width: min(145px, 52%);
  filter: drop-shadow(0 18px 34px rgba(0, 0, 0, 0.45));
}

/* Photographic mockup (real rendered book cover, supplied as an asset,
   background removed) — used when a slide provides mockupImage; falls back
   to .hero-mockup above otherwise. No border-radius/box: the PNG is already
   cropped to the book's silhouette with a transparent background, so it
   floats directly on the hero's own gradient. */
.hero-mockup-photo {
  width: auto;
  height: auto;
  max-width: min(320px, 74%);
  max-height: 80%;
  filter: drop-shadow(0 24px 46px rgba(0, 0, 0, 0.45));
}

.hero-mockup__back {
  position: absolute;
  inset: var(--space-6) calc(-1 * var(--space-6)) calc(-1 * var(--space-3)) var(--space-6);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.16) 0%, rgba(255, 255, 255, 0.05) 100%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  transform: rotate(7deg);
}

/* Hardcover book: spine + cover rotate together as one rigid object */
.hero-book {
  position: relative;
  display: flex;
  align-items: stretch;
  aspect-ratio: 3 / 4;
  transform: rotate(-4deg);
  transform-origin: bottom left;
}

.hero-book__spine {
  flex-shrink: 0;
  width: 11%;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.32) 0%, rgba(0, 0, 0, 0.05) 55%, rgba(255, 255, 255, 0.18) 100%),
    var(--mockup-color, var(--color-accent));
  box-shadow: inset -2px 0 3px rgba(0, 0, 0, 0.3);
}

.hero-book__cover {
  position: relative;
  flex: 1;
  min-width: 0;
  background: linear-gradient(165deg, #ffffff 0%, #f3f6fc 100%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-left: 1px solid rgba(10, 20, 45, 0.06);
}

/* Simulated page-block thickness along the right edge, like a closed book */
.hero-book__cover::after {
  content: '';
  position: absolute;
  top: 3%; right: -7px; bottom: 3%;
  width: 7px;
  background: repeating-linear-gradient(
    to bottom,
    #e4e8f2 0, #e4e8f2 2px,
    #cfd6e6 2px, #cfd6e6 3px
  );
  border-radius: 0 3px 3px 0;
  box-shadow: 2px 0 6px rgba(10, 20, 45, 0.15);
}

.hero-book__cover::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 130%; height: 12px;
  background: linear-gradient(90deg, var(--mockup-color, var(--color-accent)), transparent 120%);
  transform: rotate(-8deg) translate(-8%, -2px);
}

.hero-mockup__label {
  font-size: 0.625rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mockup-color, var(--color-accent));
  margin-top: var(--space-3);
}

.hero-mockup__title {
  flex: 1;
  display: flex;
  align-items: flex-end;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  font-weight: var(--fw-bold);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin-top: var(--space-2);
}

.hero-mockup__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.hero-mockup__brand img { width: 18px; height: 18px; flex-shrink: 0; }

.hero-mockup__brand span {
  font-size: 0.5625rem;
  line-height: 1.35;
  color: var(--color-brand-text);
  font-weight: var(--fw-semibold);
}

.hero-mockup__brand em {
  font-style: normal;
  font-weight: var(--fw-regular);
  color: var(--color-brand-text);
  opacity: 0.65;
  letter-spacing: 0.04em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-5);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: transform var(--dur-base) var(--ease-spring), box-shadow var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 12px 32px rgba(46, 120, 255, 0.35);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(46, 120, 255, 0.42); }
.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.2); }

/* Slider controls */
.hero-controls {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  transition: background var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.hero-arrow:hover { background: rgba(255, 255, 255, 0.22); transform: translateY(-50%) scale(1.06); }
.hero-arrow--prev { left: var(--space-8); }
.hero-arrow--next { right: var(--space-8); }

.hero-indicators {
  position: absolute;
  left: 50%;
  bottom: var(--space-10);
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-3);
  pointer-events: auto;
  z-index: 3;
}

.hero-indicator {
  width: 32px; height: 3px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.35);
  border: none;
  padding: 0;
  overflow: hidden;
  position: relative;
}

.hero-indicator__fill {
  position: absolute;
  inset: 0;
  background: #fff;
  transform-origin: left;
  transform: scaleX(0);
}

.hero-indicator.is-active .hero-indicator__fill { transform: scaleX(1); }
.hero-indicator.is-active .hero-indicator__fill.is-animating {
  transition: transform var(--dur-slower) linear;
}

/* ---------- Search ---------- */
.search-section {
  position: relative;
  z-index: 4;
  flex-shrink: 0;
  margin-top: -34px;
  padding-inline: var(--space-6);
}

.search-panel {
  max-width: 640px;
  margin-inline: auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.search-panel__icon {
  flex-shrink: 0;
  width: 18px; height: 18px;
  color: var(--color-ink-faint);
  margin-left: var(--space-2);
}

.search-panel__input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--fs-sm);
  font-family: var(--font-body);
  color: var(--color-ink);
  padding: var(--space-2) 0;
}
.search-panel__input::placeholder { color: var(--color-ink-faint); }

.search-panel__clear {
  display: none;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  border: none;
  align-items: center;
  justify-content: center;
}
.search-panel__clear.is-visible { display: flex; }

.search-panel__submit {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.search-panel__submit:hover { background: var(--color-primary-dark); transform: scale(1.04); }

.search-results {
  max-width: 760px;
  margin: var(--space-3) auto 0;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  transition: max-height var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}

.search-results.is-open {
  max-height: 420px;
  opacity: 1;
  pointer-events: auto;
  overflow-y: auto;
}

.search-result {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--dur-fast) var(--ease-out);
}
.search-result:last-child { border-bottom: none; }
.search-result:hover { background: var(--color-surface-alt); }

.search-result__icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-accent-soft);
  color: var(--color-primary);
}

.search-result__body { flex: 1; min-width: 0; }
.search-result__name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-result__meta { font-size: var(--fs-xs); color: var(--color-ink-faint); }

.search-empty {
  padding: var(--space-8);
  text-align: center;
  color: var(--color-ink-faint);
  font-size: var(--fs-sm);
}

/* ---------- Section shell ---------- */
.section {
  padding-block: clamp(16px, 3vh, 32px);
}

/* Cards section: grows to absorb whatever vertical space is left between
   the hero and the update strip, and centers its content within it — this
   is what makes the whole hub fit one screen at any viewport height. */
.section--grow {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
}

.section--tight {
  flex-shrink: 0;
  padding-block: var(--space-2);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.section__title--compact {
  font-size: var(--fs-base);
  margin-bottom: var(--space-3);
}

.section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

/* ---------- Cards grid ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
}

.hub-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
  overflow: hidden;
  isolation: isolate;
}

.hub-card:not(.is-locked):hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-strong);
}

.hub-card__icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-1);
  color: #fff;
  transition: transform var(--dur-base) var(--ease-spring);
}
.hub-card:not(.is-locked):hover .hub-card__icon { transform: scale(1.08) rotate(-4deg); }

.hub-card__icon svg { width: 16px; height: 16px; }

.hub-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin-bottom: 2px;
}

.hub-card__desc {
  font-size: 0.6875rem;
  color: var(--color-ink-soft);
  line-height: var(--lh-snug);
  margin-bottom: var(--space-1);
}

.hub-card__footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.hub-card__updated {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.625rem;
  font-weight: var(--fw-medium);
  color: var(--color-ink-faint);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.hub-card__updated svg {
  width: 10px; height: 10px;
  flex-shrink: 0;
}

.hub-card__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-primary);
}

.hub-card__cta svg {
  width: 13px; height: 13px;
  transition: transform var(--dur-base) var(--ease-out);
}
.hub-card:not(.is-locked):hover .hub-card__cta { background: var(--color-primary); color: #fff; }
.hub-card:not(.is-locked):hover .hub-card__cta svg { transform: translateX(2px); }

/* Locked / coming-soon state */
.hub-card.is-locked { cursor: default; }

.hub-card__overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  text-align: center;
  background: rgba(248, 249, 252, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}

.hub-card.is-locked .hub-card__overlay { opacity: 1; }

.hub-card__lock {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-faint);
}
.hub-card__lock svg { width: 20px; height: 20px; }

.hub-card__overlay-text {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-ink-soft);
}

.hub-card.is-disabled { opacity: 0.55; pointer-events: none; }

/* ---------- Category view ---------- */
.category-view__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.category-view__heading {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.category-view__icon {
  flex-shrink: 0;
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.category-view__icon svg { width: 24px; height: 24px; }

.category-view__desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-soft);
  margin-top: 2px;
}

.category-view__back {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-ink-soft);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  margin-top: var(--space-2);
}
.category-view__back:hover {
  color: var(--color-primary);
  border-color: var(--color-accent-soft);
  background: var(--color-accent-soft);
}

.category-search {
  max-width: 440px;
  margin-bottom: var(--space-6);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-1) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.category-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
  background: var(--color-surface);
}

.category-search__icon {
  flex-shrink: 0;
  width: 16px; height: 16px;
  color: var(--color-ink-faint);
  margin-left: var(--space-2);
}

.category-search__input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--fs-sm);
  font-family: var(--font-body);
  color: var(--color-ink);
  padding: var(--space-2) 0;
}
.category-search__input::placeholder { color: var(--color-ink-faint); }

.category-search__clear {
  display: none;
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-ink-soft);
  border: none;
  align-items: center;
  justify-content: center;
}
.category-search__clear.is-visible { display: flex; }

[data-category-view][hidden] { display: none; }

/* ---------- Recent documents ---------- */
.docs-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.doc-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.doc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-border-strong); }

.doc-card__icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.doc-card__icon svg { width: 20px; height: 20px; }

.doc-card__body { flex: 1; min-width: 0; }

.doc-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.doc-card__name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-ink);
  line-height: 1.35;
}

.doc-card__badge {
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: var(--fw-semibold);
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-success);
  color: #fff;
  white-space: nowrap;
}

.doc-card__meta {
  font-size: var(--fs-xs);
  color: var(--color-ink-faint);
  margin-bottom: var(--space-3);
}

.doc-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.doc-card__tags { display: flex; gap: var(--space-1); flex-wrap: wrap; }
.doc-card__tag {
  font-size: 0.6875rem;
  color: var(--color-ink-soft);
  background: var(--color-surface-alt);
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
}

.doc-card__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.doc-card__preview {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: var(--fw-semibold);
  white-space: nowrap;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.doc-card__preview svg { width: 13px; height: 13px; }
.doc-card__preview:hover,
.doc-card:hover .doc-card__preview {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.doc-card__download {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-surface-alt);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.doc-card__download:hover { background: var(--color-primary); color: #fff; transform: scale(1.06); }
.doc-card__download svg { width: 16px; height: 16px; }

/* ---------- PDF viewer ---------- */
.pdf-viewer {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}
.pdf-viewer[hidden] { display: none; }

.pdf-viewer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(6, 12, 28, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.pdf-viewer__panel {
  position: relative;
  z-index: 1;
  width: min(880px, 100%);
  height: 100%;
  max-height: 860px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: pdf-viewer-in var(--dur-slow) var(--ease-spring);
}

@keyframes pdf-viewer-in {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.pdf-viewer__header {
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.pdf-viewer__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.pdf-viewer__meta {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-ink-faint);
  margin-top: 2px;
}

.pdf-viewer__actions {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pdf-viewer__download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  transition: background var(--dur-base) var(--ease-out);
}
.pdf-viewer__download:hover { background: var(--color-primary-dark); }

.pdf-viewer__close {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.pdf-viewer__close:hover { background: var(--color-border); color: var(--color-ink); }

.pdf-viewer__body {
  position: relative;
  flex: 1;
  min-height: 0;
  background: var(--color-surface-alt);
}

.pdf-viewer__frame {
  width: 100%;
  height: 100%;
  border: none;
}

.pdf-viewer__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.pdf-viewer__nav:hover { background: var(--color-primary); color: #fff; transform: translateY(-50%) scale(1.06); }
.pdf-viewer__nav[hidden] { display: none; }
.pdf-viewer__nav--prev { left: var(--space-4); }
.pdf-viewer__nav--next { right: var(--space-4); }

.pdf-viewer__footer {
  flex-shrink: 0;
  text-align: center;
  padding: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-ink-faint);
  border-top: 1px solid var(--color-border);
}

/* ---------- Update strip ---------- */
.update-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-sm);
}

.update-strip__left { display: flex; align-items: center; gap: var(--space-3); }

.update-strip__icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.update-strip__icon svg { width: 18px; height: 18px; }

.update-strip__title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-ink);
}
.update-strip__desc { font-size: var(--fs-xs); color: var(--color-ink-faint); }

.update-strip__right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--color-ink-soft);
}

.update-strip__live {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 4px rgba(26, 163, 122, 0.16);
}

/* ---------- Footer ---------- */
.site-footer {
  flex-shrink: 0;
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.86);
  padding-block: var(--space-3) var(--space-2);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  flex: 1 1 200px;
}

.footer-item__icon {
  flex-shrink: 0;
  width: 20px; height: 20px;
  color: #6fa3ff;
  margin-top: 2px;
}
.footer-item__icon svg { width: 100%; height: 100%; }

.footer-item__body { display: flex; flex-direction: column; gap: 2px; }

.footer-item__label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

.footer-item__value {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.9);
  line-height: var(--lh-snug);
}

.footer-item__value--link { transition: color var(--dur-base) var(--ease-out); }
.footer-item__value--link:hover { color: #fff; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.5);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-version {
  padding: 3px var(--space-3);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

/* ---------- Access gate ---------- */
html.is-gate-locked body > *:not(.access-gate) {
  filter: blur(16px);
  pointer-events: none;
  user-select: none;
}

html.is-gate-locked body {
  overflow: hidden;
}

.access-gate {
  position: fixed;
  inset: 0;
  z-index: var(--z-gate);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: rgba(6, 12, 28, 0.45);
}
.access-gate[hidden] { display: none; }

.access-gate__panel {
  width: min(420px, 100%);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8) var(--space-8);
  text-align: center;
  animation: pdf-viewer-in var(--dur-slow) var(--ease-spring);
}

.access-gate__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.access-gate__title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--color-ink);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

.access-gate__desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-soft);
  line-height: var(--lh-normal);
  margin-bottom: var(--space-6);
}

.access-gate__form {
  display: flex;
  gap: var(--space-2);
}

.access-gate__input {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  background: var(--color-surface-alt);
  font-size: var(--fs-sm);
  font-family: var(--font-body);
  color: var(--color-ink);
  text-align: left;
  transition: border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
}
.access-gate__input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
  background: var(--color-surface);
}

.access-gate__submit {
  flex-shrink: 0;
  height: 44px;
  padding: 0 var(--space-5);
  border-radius: var(--radius-pill);
  border: none;
  background: var(--color-primary);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  transition: background var(--dur-base) var(--ease-out);
}
.access-gate__submit:hover { background: var(--color-primary-dark); }

.access-gate__error {
  margin-top: var(--space-4);
  font-size: var(--fs-xs);
  color: var(--color-danger);
  line-height: var(--lh-snug);
}
.access-gate__error[hidden] { display: none; }