:root {
  color-scheme: light dark;
  --act-bg: #ffffff;
  --act-surface: #f6f8fb;
  --act-surface-strong: #e9eef5;
  --act-text: #0f172a;
  --act-text-muted: #334155;
  --act-border: #cbd5e1;
  --act-primary: #0057d9;
  --act-on-primary: #ffffff;
  --act-primary-soft: #e8f1ff;
  --act-secondary: #006a6b;
  --act-on-secondary: #ffffff;
  --act-secondary-soft: #e6f7f5;
  --act-success: #146c2e;
  --act-success-bg: #e7f6ec;
  --act-warning: #8a4b00;
  --act-warning-bg: #fff3d6;
  --act-error: #b3261e;
  --act-error-bg: #fce8e6;
  --act-info: #0057d9;
  --act-info-bg: #e8f1ff;
  --act-focus: #0057d9;
  --act-shadow: rgba(15, 23, 42, 0.16);
  --act-hero-bg: #0f172a;
  --act-hero-text: #f8fafc;
  --act-hero-muted: #d7dee7;
  --act-red: var(--act-error);
  --act-red-dark: #7f1d1d;
  --act-black: var(--act-text);
  --act-black-soft: var(--act-surface-strong);
  --act-yellow: var(--act-warning);
  --act-yellow-soft: var(--act-warning-bg);
  --act-white: var(--act-bg);
  --act-ink: var(--act-text);
  --act-muted: var(--act-text-muted);
  --act-line: var(--act-border);
  --act-card: var(--act-surface);
  --act-good: var(--act-success);
  --act-warn: var(--act-warning);
  --act-bad: var(--act-error);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-act-theme="light"]) {
    --act-bg: #0b0f14;
    --act-surface: #161d27;
    --act-surface-strong: #1f2937;
    --act-text: #f5f7fa;
    --act-text-muted: #d7dee7;
    --act-border: #334155;
    --act-primary: #7cb6ff;
    --act-on-primary: #08111f;
    --act-primary-soft: #102a4a;
    --act-secondary: #5cc7b2;
    --act-on-secondary: #071411;
    --act-secondary-soft: #0f332d;
    --act-success: #7bd88f;
    --act-success-bg: #12301e;
    --act-warning: #ffcc66;
    --act-warning-bg: #3a2908;
    --act-error: #ff8a80;
    --act-error-bg: #3a1717;
    --act-info: #8ab4f8;
    --act-info-bg: #102a4a;
    --act-focus: #8ab4f8;
    --act-shadow: rgba(0, 0, 0, 0.45);
    --act-hero-bg: #111827;
    --act-hero-text: #f5f7fa;
    --act-hero-muted: #d7dee7;
  }
}

:root[data-act-theme="dark"] {
  color-scheme: dark;
  --act-bg: #0b0f14;
  --act-surface: #161d27;
  --act-surface-strong: #1f2937;
  --act-text: #f5f7fa;
  --act-text-muted: #d7dee7;
  --act-border: #334155;
  --act-primary: #7cb6ff;
  --act-on-primary: #08111f;
  --act-primary-soft: #102a4a;
  --act-secondary: #5cc7b2;
  --act-on-secondary: #071411;
  --act-secondary-soft: #0f332d;
  --act-success: #7bd88f;
  --act-success-bg: #12301e;
  --act-warning: #ffcc66;
  --act-warning-bg: #3a2908;
  --act-error: #ff8a80;
  --act-error-bg: #3a1717;
  --act-info: #8ab4f8;
  --act-info-bg: #102a4a;
  --act-focus: #8ab4f8;
  --act-shadow: rgba(0, 0, 0, 0.45);
  --act-hero-bg: #111827;
  --act-hero-text: #f5f7fa;
  --act-hero-muted: #d7dee7;
}

:root[data-act-theme="light"] {
  color-scheme: light;
}

body {
  background: var(--act-bg);
  color: var(--act-text);
}

.act-shell {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 24px 0 36px;
}

.act-back {
  display: inline-flex;
  margin: 0 0 18px;
  color: var(--act-text);
  font-weight: 800;
  text-decoration-color: var(--act-primary);
  text-decoration-thickness: 3px;
}


.act-pwa .act-back {
  display: none;
}

.act-pwa .act-shell {
  padding-top: calc(14px + env(safe-area-inset-top));
}


@media (display-mode: standalone) {
  .act-back {
    display: none;
  }

  .act-shell {
    padding-top: calc(14px + env(safe-area-inset-top));
  }
}

.act-hero {
  background: var(--act-hero-bg);
  border: 2px solid var(--act-border);
  border-bottom: 6px solid var(--act-primary);
  border-radius: 28px;
  color: var(--act-hero-text);
  padding: 30px;
  box-shadow: 0 18px 42px var(--act-shadow);
  position: relative;
  overflow: hidden;
}

.act-hero::before {
  display: none;
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  top: 52%;
  height: 18px;
  background: var(--act-primary);
  border-top: 4px solid var(--act-border);
  border-bottom: 4px solid var(--act-border);
  transform: rotate(-4deg);
  opacity: 0.96;
}

.act-hero::after {
  display: none;
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  border: 34px solid var(--act-primary-soft);
  border-radius: 999px;
}

.act-hero > * {
  position: relative;
  z-index: 1;
}

.act-kicker {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 800;
  font-size: 0.8rem;
  margin: 0 0 8px;
  color: var(--act-hero-muted);
  text-shadow: none;
}

.act-hero h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  margin: 0 0 10px;
}

.act-hero p {
  color: var(--act-hero-muted);
  max-width: 780px;
  font-size: 1.04rem;
  line-height: 1.55;
}

.act-actions {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  margin: 22px 0;
}

.btn {
  border: 0;
  border-radius: 14px;
  padding: 13px 18px;
  font-weight: 800;
  cursor: pointer;
  min-height: 48px;
  transition: 0.2s transform, 0.2s box-shadow, 0.2s background;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary,
.btn-secondary {
  background: var(--act-primary);
  color: var(--act-on-primary);
  border: 2px solid var(--act-primary);
  box-shadow: 0 8px 18px var(--act-shadow);
}

.btn-secondary {
  background: var(--act-secondary);
  color: var(--act-on-secondary);
  border-color: var(--act-secondary);
}

.btn-outline {
  background: var(--act-bg);
  color: var(--act-primary);
  border: 2px solid var(--act-primary);
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.save-all-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  color: var(--act-hero-text);
}

.save-all-status::before {
  content: "Offline status:";
  color: var(--act-hero-muted);
  font-weight: 800;
}

.act-search-note {
  margin: 18px 0 0;
  padding: 10px 12px;
  border-left: 5px solid var(--act-secondary);
  background: color-mix(in srgb, var(--act-primary-soft) 55%, transparent);
  color: var(--act-hero-text);
  border-radius: 10px;
  font-size: 0.92rem;
  line-height: 1.45;
}


.btn:focus-visible,
.filter-btn:focus-visible,
.protocol-search:focus-visible,
.act-back:focus-visible,
.pdf-back-button:focus-visible,
.pdf-open-link:focus-visible {
  outline: 3px solid var(--act-focus);
  outline-offset: 3px;
}

.act-controls {
  background: var(--act-surface);
  border: 2px solid var(--act-border);
  border-top: 6px solid var(--act-primary);
  border-radius: 22px;
  padding: 18px;
  margin: 22px 0;
  box-shadow: 0 10px 28px var(--act-shadow);
}

.search-label {
  display: block;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--act-text);
}

.protocol-search {
  width: 100%;
  border: 2px solid var(--act-border);
  border-radius: 16px;
  padding: 15px 16px;
  font-size: 1rem;
  outline: none;
  background: var(--act-bg);
  color: var(--act-text);
}


.protocol-search:focus {
  border-color: var(--act-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--act-focus) 28%, transparent);
}

.category-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.filter-btn {
  border: 2px solid var(--act-border);
  background: var(--act-surface);
  color: var(--act-text);
  font-weight: 800;
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--act-primary);
  color: var(--act-on-primary);
  box-shadow: inset 0 -4px 0 var(--act-secondary);
}

.act-results-summary {
  font-weight: 800;
  color: var(--act-text);
  margin: 8px 2px 14px;
}

.protocol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.protocol-card {
  background: var(--act-card);
  border: 2px solid var(--act-border);
  border-top: 6px solid var(--act-primary);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 0 10px 26px var(--act-shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.protocol-card h2 {
  font-size: 1.18rem;
  line-height: 1.25;
  margin: 0;
  color: var(--act-text);
}

.protocol-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.protocol-pill {
  border-radius: 999px;
  background: var(--act-surface-strong);
  color: var(--act-text);
  padding: 5px 9px;
  font-size: 0.78rem;
  font-weight: 800;
}

.protocol-id {
  background: var(--act-primary-soft);
  color: var(--act-primary);
  border: 1px solid var(--act-border);
}


.protocol-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: auto;
}

.match-reasons {
  display: grid;
  gap: 7px;
}

.match-reason {
  border-left: 5px solid var(--act-primary);
  background: var(--act-info-bg);
  border-radius: 10px;
  color: var(--act-text);
  font-size: 0.88rem;
  line-height: 1.35;
  padding: 8px 10px;
}

.match-reason span {
  display: inline-block;
  margin-left: 4px;
  font-weight: 800;
}

.offline-status {
  font-weight: 800;
  border-radius: 12px;
  padding: 9px 10px;
  background: var(--act-yellow-soft);
  color: var(--act-warn);
  border: 1px solid var(--act-yellow);
}

.offline-status.saved {
  background: var(--act-success-bg);
  color: var(--act-good);
}

.offline-status.caching {
  background: var(--act-info-bg);
  color: var(--act-info);
  border-color: var(--act-info);
}

.offline-status.error {
  background: var(--act-error-bg);
  color: var(--act-bad);
}

.empty-state,
.error-state {
  grid-column: 1 / -1;
  background: var(--act-surface);
  border: 2px dashed var(--act-border);
  border-radius: 18px;
  padding: 28px;
  text-align: center;
  color: var(--act-muted);
  font-weight: 700;
}

.act-footer {
  margin-top: 28px;
}

.act-viewer-body {
  margin: 0;
  background: var(--act-surface-strong);
  min-height: 100dvh;
  overflow: hidden;
}

.pdf-viewer-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: calc(10px + env(safe-area-inset-top)) 12px 10px;
  background: var(--act-hero-bg);
  border-bottom: 5px solid var(--act-primary);
  box-shadow: 0 8px 24px var(--act-shadow);
}

.pdf-back-button,
.pdf-open-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  padding: 0 14px;
  background: var(--act-primary);
  color: var(--act-on-primary);
  border: 2px solid var(--act-primary);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.pdf-open-link {
  background: var(--act-bg);
  color: var(--act-primary);
}

.pdf-viewer-title-wrap {
  min-width: 0;
}

.pdf-viewer-kicker {
  margin: 0;
  color: var(--act-hero-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pdf-viewer-title-wrap h1 {
  margin: 2px 0 0;
  font-size: clamp(0.95rem, 4vw, 1.2rem);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--act-hero-text);
}

.pdf-viewer-shell {
  height: calc(100dvh - 69px - env(safe-area-inset-top));
  padding: 0;
}

.pdf-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--act-bg);
}

.pdf-viewer-error {
  margin: 18px;
  border: 2px solid var(--act-error);
  background: var(--act-error-bg);
  color: var(--act-bad);
  border-radius: 14px;
  padding: 14px;
  font-weight: 800;
}

.hidden {
  display: none !important;
}

@media (max-width: 640px) {
  .act-shell {
    width: min(100% - 18px, 1180px);
    padding-top: 14px;
  }


  .act-hero {
    padding: 22px;
    border-radius: 22px;
  }

  .act-search-note {
    margin: 18px 0 0;
    padding: 10px 12px;
    border-left: 5px solid var(--act-secondary);
    background: color-mix(in srgb, var(--act-primary-soft) 55%, transparent);
    color: var(--act-hero-text);
    border-radius: 10px;
    font-size: 0.92rem;
    line-height: 1.45;
  }

  .act-controls {
    padding: 14px;
  }

  .protocol-buttons {
    grid-template-columns: 1fr;
  }

  .btn,
  .filter-btn {
    width: 100%;
  }

  .category-filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .filter-btn:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 420px) {
  .pdf-viewer-header {
    gap: 8px;
    padding-left: 8px;
    padding-right: 8px;
  }

  .pdf-back-button,
  .pdf-open-link {
    padding: 0 11px;
    font-size: 0.92rem;
  }

  .pdf-viewer-kicker {
    display: none;
  }

  .pdf-viewer-title-wrap h1 {
    font-size: 0.95rem;
  }
}