/* Shared homepage and reader-page masthead. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--topbar-border);
  background: linear-gradient(180deg, var(--topbar-bg-start) 0%, var(--topbar-bg-end) 100%);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  /* Promote to GPU compositing layer — prevents white-line repaint on iOS when
     the virtual keyboard appears alongside position:sticky + backdrop-filter. */
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}
.masthead-shell {
  width: min(1120px, calc(100% - 72px));
  margin: 0 auto;
  padding: 16px 0 10px;
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-datetime {
  color: var(--chip-ink);
  font-size: 0.84rem;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, var(--chip-border));
  background: color-mix(in srgb, var(--accent-2) 12%, var(--chip-bg));
  border-radius: var(--ui-radius);
  padding: 6px 12px;
  white-space: nowrap;
}
.weather-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, var(--chip-border));
  background: color-mix(in srgb, var(--accent-2) 12%, var(--chip-bg));
  border-radius: var(--ui-radius);
  padding: 8px 10px;
  font-size: 0.88rem;
  color: var(--chip-ink);
}
.weather-city {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.weather-icon {
  font-size: 0.95rem;
  line-height: 1;
}
.weather-temp {
  font-weight: 700;
}
.weather-low {
  color: var(--muted);
}
.weather-label {
  font-size: 0.72rem;
  color: var(--muted);
}
.theme-toggle {
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--ui-radius);
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, var(--chip-border));
  background: color-mix(in srgb, var(--accent-2) 12%, var(--chip-bg));
  color: var(--chip-ink);
  padding: 6px 11px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.theme-toggle-icon {
  font-size: 0.95rem;
  line-height: 1;
}
.theme-toggle-label {
  line-height: 1;
  font-size: 0.84rem;
  font-weight: 650;
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}
.search-inline {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.search-inline input {
  min-height: 44px;
  width: 210px;
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, var(--input-border));
  border-radius: var(--ui-radius);
  background: color-mix(in srgb, var(--accent-2) 12%, var(--input-bg));
  color: var(--input-ink);
  padding: 0 12px;
  font: inherit;
}
.search-inline input::placeholder {
  color: var(--input-placeholder);
}
.search-inline input[type="search"]::-webkit-search-cancel-button {
  -webkit-appearance: auto;
  appearance: auto;
  opacity: 0.65;
  filter: invert(1);
  cursor: pointer;
}
:root[data-theme="light"] .search-inline input[type="search"]::-webkit-search-cancel-button {
  filter: invert(0);
}
.search-toggle {
  min-width: 44px;
  min-height: 44px;
  display: inline-grid;
  place-items: center;
  padding: 8px;
  color: var(--chip-ink);
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  border-radius: var(--ui-radius);
}
.header-datetime,
.weather-chip,
.theme-toggle,
.search-toggle,
.search-inline input {
  height: 44px;
  min-height: 44px;
  border-radius: var(--ui-radius);
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, var(--input-border));
  background: color-mix(in srgb, var(--accent-2) 12%, var(--input-bg));
}
.search-toggle:focus-visible,
.search-inline input:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}
.search-toggle[hidden],
.search-inline[hidden] { display: none; }
.weather-temp:empty,
.weather-low:empty { display: none; }
@media (max-width: 1080px) {
.masthead-shell {
    width: min(1120px, calc(100% - 32px));
  }
}
@media (max-width: 900px) {
.header-actions {
    margin-left: auto;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
.search-inline input {
    width: 160px;
  }
}
@media (max-width: 1080px) {
.masthead-shell {
    padding-top: 12px;
    padding-bottom: 8px;
  }
.brand-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) max-content 44px 44px;
    align-items: center;
    gap: 8px;
  }
.header-actions {
    display: contents;
  }
.header-datetime {
    display: none;
  }
.weather-chip {
    min-width: 44px;
    width: max-content;
    justify-self: start;
    white-space: nowrap;
    min-height: 44px;
    grid-column: 2;
    grid-row: 1;
    padding-inline: 9px;
  }
.search-inline {
    width: 100%;
    grid-column: 1 / -1;
    grid-row: 2;
    min-width: 0;
  }
.search-toggle { grid-column: 3; grid-row: 1; }
.theme-toggle { grid-column: 4; grid-row: 1; margin-left: 0; padding-inline: 8px; }
.theme-toggle-label { display: none; }
.search-inline input {
    width: 100%;
    min-width: 0;
    font-size: 1rem;
  }
}
@media (max-width: 640px) {
.masthead-shell {
    width: calc(100% - 18px);
  }
.masthead-shell {
    padding-top: 10px;
    padding-bottom: 8px;
  }
.theme-toggle {
    min-width: 44px;
    justify-content: center;
    padding-inline: 10px;
    margin-left: 0;
  }
.theme-toggle-label {
    display: none;
    font-size: 0.8rem;
  }
.weather-chip {
    gap: 6px;
    padding-inline: 9px;
  }
.weather-city,
.weather-low {
    display: none;
  }
.search-inline {
    gap: 4px;
    width: 100%;
  }
.search-inline input {
    width: 100%;
  }
}
@media (max-width: 480px) {
.masthead-shell {
    width: calc(100% - 16px);
  }
.search-inline {
    grid-column: 1 / -1;
    grid-row: 2;
  }
.search-inline input {
    min-height: 44px;
    font-size: 1rem;
  }
}
@media (min-width: 390px) and (max-width: 640px) {
.brand-row { grid-template-columns: minmax(0, 1fr) max-content 50px 44px; }
.search-toggle { width: 100%; }
.weather-chip { padding-inline: 12px; }
}
.topbar { line-height: 1.5; }
.topbar .info-home { display: inline-block; padding: 6px 0 0; min-height: 30px; }
html { scroll-padding-top: calc(var(--sticky-header-height, 80px) + 12px); }