/* ==========================================================================
   MTL shared theme — two skins over one variable vocabulary.

   Default: "glass cockpit" — deep navy, EFIS cyan/magenta, translucent
   glass panels, subtle glows.
   data-theme="classic": the original aeronautical sectional look — tan
   paper, magenta symbology.

   Templates keep using the historical names (--paper, --magenta, …); the
   themes just swap the values, so both skins drive every page.
   ========================================================================== */

:root {
  /* glass cockpit (default) */
  --paper:      #0a0e15;            /* page background          */
  --paper-lit:  #10182390;          /* raised surface           */
  --paper-solid:#101823;            /* raised surface, opaque   */
  --paper-deep: #060a10;            /* recessed surface         */
  --ink:        #e6edf3;            /* primary text             */
  --mute:       #8b95a9;            /* secondary text           */
  --magenta:    #ff3d81;            /* EFIS magenta accent      */
  --chart-blue: #38cdf5;            /* EFIS cyan                */
  --alert:      #ff6b4a;
  --ok:         #34d97b;
  --warn:       #ffb02e;
  --rule:       rgba(148,163,184,.14);

  --glass:      rgba(13,19,29,.72);
  --glass-brd:  rgba(148,163,184,.16);
  --blur:       blur(14px) saturate(1.2);
  --radius:     10px;
  --radius-sm:  6px;
  --glow-accent: 0 0 14px rgba(255,61,129,.45);
  --glow-cyan:   0 0 12px rgba(56,205,245,.35);
  --shadow:      0 10px 30px rgba(0,0,0,.45);
  --num-glow:    0 0 10px rgba(56,205,245,.25);

  /* canvas palette (read by JS at draw time) */
  --cv-bg:      rgba(230,237,243,.03);
  --cv-grid:    rgba(230,237,243,.07);
  --cv-ground:  rgba(255,107,74,.10);
  --cv-cursor:  rgba(230,237,243,.55);
  --cv-faint:   rgba(230,237,243,.35);
  --cv-zero:    rgba(230,237,243,.25);
  --marker-stroke: #0a0e15;
  --own-plane:  #34d97b;
  --other-plane:#ff6b4a;
  --track-own:  #34d97b;
  --track-other:#ff6b4a;

  /* chart series */
  --s-msl:  #e6edf3;  --s-agl:  #ff3d81;  --s-ias: #38cdf5;
  --s-gs:   #34d97b;  --s-burn: #ffb02e;  --s-vs:  #e0a458;
  --s-slope:#ff3d81;  --s-pitch:#8b95a9;  --s-bank:#34d97b;
  --s-wind: #38cdf5;  --s-dir:  #e0a458;

  color-scheme: dark;
}

:root[data-theme="classic"] {
  --paper:      #e4ddc9;
  --paper-lit:  #efead9;
  --paper-solid:#efead9;
  --paper-deep: #d6cdb4;
  --ink:        #1b2420;
  --mute:       #7d765f;
  --magenta:    #b8195c;
  --chart-blue: #256b8a;
  --alert:      #a83512;
  --ok:         #1a6e3c;
  --warn:       #7a5800;
  --rule:       rgba(27,36,32,.18);

  --glass:      rgba(239,234,217,.90);
  --glass-brd:  rgba(27,36,32,.18);
  --blur:       blur(8px);
  --radius:     0px;
  --radius-sm:  0px;
  --glow-accent: none;
  --glow-cyan:   none;
  --shadow:      0 4px 16px rgba(27,36,32,.18);
  --num-glow:    none;

  --cv-bg:      rgba(27,36,32,.03);
  --cv-grid:    rgba(27,36,32,.09);
  --cv-ground:  rgba(168,53,22,.08);
  --cv-cursor:  rgba(27,36,32,.5);
  --cv-faint:   rgba(27,36,32,.35);
  --cv-zero:    rgba(27,36,32,.22);
  --marker-stroke: #efead9;
  --own-plane:  #27ae60;
  --other-plane:#c0392b;
  --track-own:  #27ae60;
  --track-other:#c0392b;

  --s-msl:  #1b2420;  --s-agl:  #b8195c;  --s-ias: #256b8a;
  --s-gs:   #5b8a6b;  --s-burn: #e07020;  --s-vs:  #a07028;
  --s-slope:#b8195c;  --s-pitch:#7d765f;  --s-bank:#5b8a6b;
  --s-wind: #256b8a;  --s-dir:  #a07028;

  color-scheme: light;
}

/* ---- base ---------------------------------------------------------------- */
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Barlow Condensed', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background .3s ease, color .3s ease;
}
::selection { background: var(--magenta); color: #fff; }

/* subtle vignette / depth on the dark skin */
:root:not([data-theme="classic"]) body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(1200px 700px at 75% -10%, rgba(56,205,245,.06), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(255,61,129,.05), transparent 60%);
}
body > * { position: relative; z-index: 1; }

/* ---- scrollbars ---------------------------------------------------------- */
* { scrollbar-width: thin; scrollbar-color: var(--rule) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 4px; }
*::-webkit-scrollbar-track { background: transparent; }

/* ---- shared header ------------------------------------------------------- */
header.mtl {
  display: flex; align-items: center; gap: 1.1rem; flex-wrap: wrap;
  padding: .55rem 1rem;
  position: sticky; top: 0; z-index: 3000;
  background: var(--glass);
  -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-brd);
}
.wordmark {
  font-weight: 600; font-size: 1.05rem; letter-spacing: .16em;
  text-transform: uppercase; white-space: nowrap;
}
.wordmark span { color: var(--magenta); text-shadow: var(--glow-accent); }
.nav { display: flex; gap: .1rem; align-items: center; }
.nav-link {
  font-size: .62rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  text-decoration: none; color: var(--mute); padding: .3rem .55rem;
  border-radius: var(--radius-sm); transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--ink); background: rgba(148,163,184,.08); }
.nav-link.active { color: var(--ink); box-shadow: inset 0 -2px 0 var(--magenta); border-radius: 0; }
.header-right { margin-left: auto; display: flex; align-items: center; gap: .75rem; }
.username { font-size: .72rem; color: var(--mute); letter-spacing: .08em; }
.logout {
  font-size: .62rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  text-decoration: none; color: var(--mute);
}
.logout:hover { color: var(--ink); }

/* ---- theme toggle -------------------------------------------------------- */
.theme-toggle {
  background: none; border: 1px solid var(--rule); color: var(--mute);
  width: 1.7rem; height: 1.7rem; border-radius: 50%; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: .85rem; line-height: 1; padding: 0; flex-shrink: 0;
  transition: color .15s, border-color .15s, transform .3s;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--mute); transform: rotate(180deg); }

/* ---- buttons ------------------------------------------------------------- */
.btn {
  padding: .5rem 1rem; font-family: inherit; font-size: .68rem; font-weight: 600;
  letter-spacing: .16em; text-transform: uppercase; cursor: pointer;
  border-radius: var(--radius-sm); background: transparent;
  border: 1px solid var(--rule); color: var(--ink);
  transition: border-color .15s, background .15s, box-shadow .15s, color .15s;
}
.btn:hover { border-color: var(--ink); }
.btn:focus-visible { outline: 2px solid var(--magenta); outline-offset: 2px; }
.btn-primary, .btn.primary {
  background: var(--magenta); border-color: var(--magenta); color: #fff;
}
.btn-primary:hover, .btn.primary:hover { box-shadow: var(--glow-accent); border-color: var(--magenta); }
.btn-ghost, .btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--rule); }
.btn-ghost:hover, .btn.ghost:hover { border-color: var(--ink); }
.btn-danger, .btn.danger { border-color: var(--alert); color: var(--alert); background: transparent; }
.btn-danger:hover, .btn.danger:hover { background: var(--alert); color: #fff; }

/* ---- glass panel utility ------------------------------------------------- */
.glass {
  background: var(--glass);
  -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---- badges -------------------------------------------------------------- */
.badge {
  display: inline-block; font-size: .58rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  padding: .18rem .5rem; border: 1px solid currentColor;
  border-radius: 99px; font-family: 'Barlow Condensed', sans-serif;
}
.badge-ok    { color: var(--ok); }
.badge-mute  { color: var(--mute); }
.badge-alert { color: var(--alert); }
.badge-warn  { color: var(--warn); }
.badge-blue  { color: var(--chart-blue); }

/* ---- forms --------------------------------------------------------------- */
input, select {
  accent-color: var(--magenta);
}
.mtl-input, .field input, .field select {
  width: 100%; padding: .5rem .65rem;
  background: var(--paper-deep); border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  font-family: 'IBM Plex Mono', monospace; font-size: .85rem; color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
.mtl-input:focus, .field input:focus, .field select:focus {
  outline: none; border-color: var(--magenta); box-shadow: 0 0 0 3px rgba(255,61,129,.18);
}

/* ---- leaflet dark-friendly chrome ---------------------------------------- */
.leaflet-container { background: var(--paper-deep); font-family: 'Barlow Condensed', sans-serif; }

/* Dark map: invert the normal OSM tiles instead of loading a near-black tile
   set — keeps full road/label/terrain detail readable at night. Applied to
   the tile pane only, so tracks and markers keep their true colors. */
:root:not([data-theme="classic"]) .leaflet-tile-pane {
  filter: invert(1) hue-rotate(180deg) brightness(.92) contrast(.88) saturate(.7);
}
.leaflet-bar a, .leaflet-bar a:hover {
  background: var(--paper-solid); color: var(--ink); border-bottom-color: var(--rule);
}
.leaflet-control-attribution {
  background: var(--glass) !important; color: var(--mute) !important;
  font-size: .58rem !important;
}
.leaflet-control-attribution a { color: var(--mute) !important; }
.leaflet-tooltip {
  background: var(--glass); color: var(--ink); border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow); border-radius: var(--radius-sm);
  -webkit-backdrop-filter: var(--blur); backdrop-filter: var(--blur);
}
.leaflet-tooltip-top:before { border-top-color: var(--glass-brd); }

/* smooth marker motion on the live map (disabled while zooming) */
.smooth-markers .leaflet-marker-icon { transition: transform 1.2s linear; }
.smooth-markers.zooming .leaflet-marker-icon { transition: none; }

/* ---- shared animation ---------------------------------------------------- */
@keyframes mtl-pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(255,61,129,.55); }
  70%  { box-shadow: 0 0 0 7px rgba(255,61,129,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,61,129,0); }
}
@keyframes mtl-fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ==========================================================================
   Sub-panels — the shared submenu pattern
   A .subnav of [data-tab] buttons over sibling [data-panel] sections, wired
   by MTL.tabs(). Any page with more than a couple of unrelated sections
   should use this rather than growing a longer scroll.
   ========================================================================== */
.subnav {
  display: flex; gap: .2rem; flex-wrap: wrap;
  margin: 0 0 1.75rem; border-bottom: 1px solid var(--rule);
}
.subnav button {
  background: none; border: 0; border-bottom: 2px solid transparent;
  color: var(--mute); font-family: inherit;
  font-size: .62rem; font-weight: 600; letter-spacing: .2em; text-transform: uppercase;
  padding: .6rem .85rem; cursor: pointer;
  transition: color .15s ease, border-color .15s ease;
}
.subnav button:hover { color: var(--ink); }
.subnav button.active { color: var(--magenta); border-bottom-color: var(--magenta); }
.subnav .subnav-note { margin-left: auto; align-self: center; font-size: .7rem; color: var(--mute); }