:root {
  /* Paleta Modo Claro */
  --bg: #EEF3F5;
  --panel: #FFFFFF;
  --panel-hover: #F8FAFB;
  --ink: #102630;
  --ink-secondary: #48616B;
  --muted: #6C828C;
  --line: #CFDCE0;
  --line-subtle: #E2ECF0;
  
  --sea: #0B4858;
  --sea-deep: #072D37;
  --sea-hover: #125E72;
  --sea-soft: #D9EBF0;
  --sea-soft-hover: #C5E2EA;
  
  --signal: #E4572E;
  --signal-soft: #FDEEE9;
  --gold: #F5A623;
  --gold-soft: #FFF8E6;

  --badge-naviera: #E0F2FE;
  --badge-naviera-txt: #0369A1;
  --badge-term: #DCFCE7;
  --badge-term-txt: #15803D;
  --badge-ad: #FEF3C7;
  --badge-ad-txt: #B45309;
  --badge-dep: #F3E8FF;
  --badge-dep-txt: #7E22CE;

  --shadow-sm: 0 1px 3px rgba(11, 72, 88, 0.06);
  --shadow-md: 0 4px 14px rgba(11, 72, 88, 0.08);
  --shadow-lg: 0 10px 28px rgba(11, 72, 88, 0.12);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg: #0A1217;
  --panel: #131F27;
  --panel-hover: #192934;
  --ink: #E6F0F2;
  --ink-secondary: #A0B6BF;
  --muted: #718894;
  --line: #223744;
  --line-subtle: #192A34;

  --sea: #1C6E82;
  --sea-deep: #0D3E4B;
  --sea-hover: #2689A2;
  --sea-soft: #143540;
  --sea-soft-hover: #1A4452;

  --signal: #FA6E46;
  --signal-soft: #331C16;
  --gold: #FFB338;
  --gold-soft: #332711;

  --badge-naviera: #0C4A6E;
  --badge-naviera-txt: #BAE6FD;
  --badge-term: #14532D;
  --badge-term-txt: #BBF7D0;
  --badge-ad: #78350F;
  --badge-ad-txt: #FDE68A;
  --badge-dep: #581C87;
  --badge-dep-txt: #E9D5FF;

  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14.5px/1.5 var(--font);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

button, input { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; }

/* ==================== HEADER ==================== */
.app-header {
  background: var(--sea-deep);
  color: #FFFFFF;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: 1540px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--signal), #FF8559);
  display: grid;
  place-items: center;
  color: #FFFFFF;
  box-shadow: 0 3px 8px rgba(228, 87, 46, 0.4);
}
.brand-icon svg { width: 22px; height: 22px; }

.brand-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title-wrap h1 {
  margin: 0;
  font-size: 1.28rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.cl-badge {
  background: rgba(255, 255, 255, 0.15);
  color: #AEE2EC;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.03em;
}

.sub {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: #A0C5CD;
}

.header-tools {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 11px;
  width: 15px;
  height: 15px;
  stroke: #86A8B0;
  pointer-events: none;
}

.search-box input {
  width: min(340px, 100vw - 40px);
  padding: 8px 36px 8px 34px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.25);
  color: #FFFFFF;
  font-size: 0.88rem;
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--signal);
  background: rgba(0, 0, 0, 0.4);
  box-shadow: 0 0 0 3px rgba(228, 87, 46, 0.35);
}

.search-box input::placeholder { color: #86A8B0; }

.shortcut-hint {
  position: absolute;
  right: 10px;
  background: rgba(255, 255, 255, 0.15);
  color: #C3DBE0;
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.72rem;
  font-family: monospace;
  font-weight: 700;
  pointer-events: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 2px;
  height: 36px;
}

.lang-opt {
  background: transparent;
  border: none;
  color: #A0C5CD;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.2;
}

.lang-opt:hover {
  color: #FFFFFF;
}

.lang-opt[aria-pressed="true"],
.lang-opt.active {
  background: var(--sea);
  color: #FFFFFF;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .lang-opt[aria-pressed="true"],
[data-theme="dark"] .lang-opt.active {
  background: var(--sea-hover);
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: var(--transition);
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.18); border-color: rgba(255, 255, 255, 0.3); }
.icon-btn svg { width: 17px; height: 17px; }

[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

.btn {
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition);
}
.btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #FFFFFF;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-primary {
  background: var(--sea);
  color: #FFFFFF;
  border: 1px solid transparent;
}
.btn-primary:hover {
  background: var(--sea-hover);
}

.btn-sm {
  padding: 5px 11px;
  font-size: 0.78rem;
}

/* ==================== TRACKER BAR ==================== */
.tracker-bar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  padding: 8px 20px;
}

.tracker-inner {
  max-width: 1540px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.tracker-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--ink);
}
.tracker-label svg { width: 18px; height: 18px; stroke: var(--signal); }

.tracker-form {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 580px;
}

.tracker-form .btn {
  padding: 6px 14px;
  font-size: 0.82rem;
  flex-shrink: 0;
  white-space: nowrap;
}

.tracker-form .btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.tracker-form input {
  flex: 1;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.tracker-form input::placeholder {
  text-transform: none;
  font-weight: 400;
  color: var(--muted);
}
.tracker-form input:focus {
  outline: none;
  border-color: var(--sea);
  background: var(--panel);
  box-shadow: 0 0 0 3px var(--sea-soft);
}

.detected-badge {
  font-size: 0.78rem;
  background: var(--sea-soft);
  color: var(--sea);
  padding: 4px 8px;
  border-radius: 4px;
  font-weight: 600;
  white-space: nowrap;
}

.tracker-help {
  font-size: 0.75rem;
  color: var(--muted);
  margin-left: auto;
}

/* ==================== SPONSORED LINKS ==================== */
.toplinks {
  max-width: 1540px;
  width: 100%;
  margin: 0 auto;
  padding: 8px 20px 0;
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
}

.slabel {
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 4px;
  letter-spacing: 0.05em;
}

.sp {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  text-decoration: none;
  color: var(--ink-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  transition: var(--transition);
}
.sp:hover {
  border-color: var(--sea);
  color: var(--sea);
  background: var(--sea-soft);
  transform: translateY(-1px);
}

/* ==================== MAIN LAYOUT ==================== */
.layout {
  flex: 1;
  width: 100%;
  max-width: 1540px;
  margin: 0 auto;
  padding: 14px 20px 24px;
  display: grid;
  grid-template-columns: minmax(360px, 5.2fr) 6.8fr;
  gap: 18px;
  align-items: start;
}

/* ==================== DIRECTORY & FILTERS ==================== */
.directory {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.filters-wrap {
  position: sticky;
  top: 61px;
  z-index: 20;
  background: var(--bg);
  padding: 4px 0 8px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 5px 11px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--ink-secondary);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  user-select: none;
}
.chip:hover {
  border-color: var(--sea);
  color: var(--sea);
}
.chip[aria-pressed="true"] {
  background: var(--sea);
  border-color: var(--sea);
  color: #FFFFFF;
  box-shadow: 0 2px 6px rgba(11, 72, 88, 0.25);
}
.chip small {
  opacity: 0.8;
  font-weight: 600;
  font-size: 0.72rem;
  background: rgba(0, 0, 0, 0.08);
  padding: 1px 5px;
  border-radius: 999px;
}
[data-theme="dark"] .chip small { background: rgba(255, 255, 255, 0.12); }
.chip[aria-pressed="true"] small {
  background: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
}

/* ==================== PORTAL LIST ==================== */
.list {
  max-height: calc(100vh - 180px);
  overflow-y: auto;
  padding-right: 6px;
}
.list::-webkit-scrollbar { width: 6px; }
.list::-webkit-scrollbar-track { background: transparent; }
.list::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
.list::-webkit-scrollbar-thumb:hover { background: var(--muted); }

.list h2 {
  margin: 16px 0 8px;
  font-size: 0.88rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--sea);
  display: flex;
  align-items: center;
  gap: 6px;
}
.list h2:first-child { margin-top: 0; }

.row {
  display: flex;
  align-items: stretch;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--line);
  border-radius: 8px;
  margin-bottom: 7px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
}
@media (hover: hover) {
  .row:hover {
    border-color: var(--sea);
    border-left-color: var(--sea);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    background: var(--panel-hover);
  }
}
.row.active {
  border-color: var(--signal);
  border-left-color: var(--signal);
  background: var(--signal-soft);
}

.fav-btn {
  background: none;
  border: none;
  padding: 0 10px;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: var(--line);
  transition: var(--transition);
  border-radius: 6px 0 0 6px;
}
.fav-btn:hover { color: var(--gold); }
.fav-btn.is-fav { color: var(--gold); }
.fav-btn svg { width: 16px; height: 16px; fill: currentColor; }

.open {
  flex: 1;
  text-align: left;
  background: none;
  border: 0;
  padding: 10px 10px 10px 2px;
  cursor: pointer;
  min-width: 0;
}
.open b {
  display: block;
  font-weight: 700;
  font-size: 0.91rem;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.meta {
  display: flex;
  gap: 7px;
  align-items: center;
  font-size: 0.77rem;
  color: var(--muted);
  margin-top: 3px;
  flex-wrap: wrap;
}

.tag {
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 0.71rem;
  letter-spacing: 0.02em;
}

.tag-naviera { background: var(--badge-naviera); color: var(--badge-naviera-txt); }
.tag-terminal { background: var(--badge-term); color: var(--badge-term-txt); }
.tag-aduanas { background: var(--badge-ad); color: var(--badge-ad-txt); }
.tag-deposito { background: var(--badge-dep); color: var(--badge-dep-txt); }
.tag-prensa { background: #EEF2FF; color: #4338CA; }
.tag-indices { background: #ECFDF5; color: #047857; }
.tag-economia { background: #FDF4FF; color: #A21CAF; }

[data-theme="dark"] .tag-prensa { background: #1E1B4B; color: #C7D2FE; }
[data-theme="dark"] .tag-indices { background: #064E3B; color: #A7F3D0; }
[data-theme="dark"] .tag-economia { background: #4A044E; color: #F5D0FE; }
.tag-default { background: var(--sea-soft); color: var(--sea); }

.host {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ext {
  display: grid;
  place-items: center;
  width: 44px;
  border-left: 1px solid var(--line);
  color: var(--muted);
  border-radius: 0 7px 7px 0;
  text-decoration: none;
  transition: var(--transition);
}
.ext:hover {
  background: var(--sea-soft);
  color: var(--sea);
}
.ext svg { width: 16px; height: 16px; }

.empty {
  padding: 32px 20px;
  border: 2px dashed var(--line);
  border-radius: 10px;
  color: var(--muted);
  text-align: center;
  background: var(--panel);
}

/* ==================== VIEWER ==================== */
.viewer {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 135px);
  min-height: 520px;
  position: sticky;
  top: 72px;
  box-shadow: var(--shadow-md);
}

.vhead {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--sea-soft);
  border-bottom: 1px solid var(--line);
}

.vtitle-wrap {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.vtitle {
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--ink);
}
.vsubtitle {
  font-size: 0.74rem;
  color: var(--muted);
}

.vactions {
  display: flex;
  gap: 14px;
  align-items: center;
}

.custom-checkbox {
  display: flex;
  gap: 6px;
  align-items: center;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--ink-secondary);
  user-select: none;
}
.custom-checkbox input { cursor: pointer; accent-color: var(--sea); }

.hint {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.78rem;
  color: var(--ink-secondary);
  background: var(--gold-soft);
  border-bottom: 1px solid var(--line);
}
.hint svg { width: 16px; height: 16px; flex-shrink: 0; stroke: var(--gold); }
.code-tag {
  background: rgba(0, 0, 0, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: monospace;
}

.stage {
  position: relative;
  flex: 1;
  background: var(--bg);
}

.stage iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #FFFFFF;
}

.placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 30px;
}

.placeholder-card {
  max-width: 440px;
  margin: 0 auto;
}

.placeholder-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--sea-soft);
  color: var(--sea);
  display: grid;
  place-items: center;
  margin: 0 auto 14px;
}
.placeholder-icon svg { width: 28px; height: 28px; }

.placeholder b {
  display: block;
  color: var(--ink);
  font-size: 1.1rem;
  margin-bottom: 6px;
}
.placeholder p {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 0 0 16px;
}

.tips-pill {
  display: inline-block;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--ink-secondary);
}
.tips-pill kbd {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 5px;
  font-family: monospace;
  font-weight: 700;
}

/* ==================== FOOTER ==================== */
.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 14px 20px;
  font-size: 0.78rem;
  color: var(--muted);
}
.footer-inner {
  max-width: 1540px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
}
.footer-inner p { margin: 0; }

[hidden] { display: none !important; }

/* ==================== RESPONSIVE ==================== */

/* Tablet */
@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 12px 14px 20px;
  }
  .list { max-height: none; overflow-y: visible; padding-right: 0; }
  .viewer { display: none; }

  /* Filtros: dejan de ser sticky en tablet para no bloquear */
  .filters-wrap {
    position: static;
    padding: 0 0 6px;
  }
}

/* Móvil ≤ 640px */
@media (max-width: 640px) {

  /* ── Header ── */
  .app-header { position: relative; } /* quita sticky en móvil */
  .header-inner {
    padding: 10px 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .brand { gap: 10px; }
  .brand-icon { width: 34px; height: 34px; }
  .brand-icon svg { width: 18px; height: 18px; }
  .brand-title-wrap h1 { font-size: 1rem; }
  .sub { display: none; } /* oculta subtítulo en pantallas chicas */

  .header-tools {
    flex-wrap: nowrap;
    gap: 8px;
    justify-content: space-between;
  }
  .search-box { flex: 1; }
  .search-box input {
    width: 100%;
    font-size: 0.82rem;
    padding: 7px 10px 7px 30px;
  }
  .shortcut-hint { display: none; }

  /* ── Tracker ── */
  .tracker-bar { padding: 10px 12px; }
  .tracker-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .tracker-label { font-size: 0.82rem; }
  .tracker-form {
    max-width: 100%;
    flex-wrap: wrap;
    gap: 6px;
  }
  .tracker-form input {
    width: 100%;
    flex: none;
    font-size: 0.82rem;
  }
  .tracker-form .btn {
    width: 100%;
    justify-content: center;
    padding: 9px 14px;
  }
  .detected-badge { width: 100%; text-align: center; }
  .tracker-help { display: none; } /* oculta texto de ayuda en móvil */

  /* ── Links patrocinados ── */
  .toplinks { padding: 8px 12px 0; gap: 6px; }

  /* ── Layout ── */
  .layout { padding: 10px 12px 20px; gap: 12px; }

  /* ── Filtros: scroll horizontal, NO sticky ── */
  /* El contenedor exterior ya NO hace scroll (antes había dos scrolls anidados
     y el gesto táctil quedaba atrapado). Solo .filters desliza. */
  .filters-wrap {
    position: static;
    padding: 0 0 8px;
  }
  .filters {
    flex-wrap: nowrap;        /* una sola fila horizontal */
    overflow-x: auto;
    overflow-y: hidden;       /* el gesto vertical pasa a la página */
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
    padding-bottom: 4px;
    scrollbar-width: none;
    /* Misma sombra lateral de antes, ahora sobre el elemento que sí desliza */
    background: linear-gradient(to right, var(--bg) 70%, transparent) local,
                linear-gradient(to left,  var(--bg) 70%, transparent) right local,
                radial-gradient(ellipse at left,  rgba(0,0,0,.12), transparent 60%) left,
                radial-gradient(ellipse at right, rgba(0,0,0,.12), transparent 60%) right;
    background-size: 40px 100%, 40px 100%, 14px 100%, 14px 100%;
    background-repeat: no-repeat;
  }
  .filters::-webkit-scrollbar { display: none; }
  .chip {
    flex-shrink: 0;           /* cada chip mantiene su tamaño */
    font-size: 0.78rem;
    padding: 5px 10px;
  }

  /* ── Lista de portales ── */
  .list { max-height: none; overflow-y: visible; padding-right: 0; }
  .list h2 { font-size: 0.82rem; margin: 14px 0 6px; }
  .open b { font-size: 0.88rem; }
  .row { margin-bottom: 6px; }

  /* ── Footer ── */
  .app-footer { padding: 12px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 4px; }
}

/* Celular en horizontal (poca altura): el header no queda fijo */
@media (max-height: 500px) and (orientation: landscape) {
  .app-header { position: relative; }
}