/*
  Front-panel look for the antenna switch.

  All colours are defined once here so the look can be retuned in one place.
  The page is dark on purpose: shacks are often dimly lit, and a bright page
  next to the radio's display is tiring.
*/
:root {
  --room: #121315;            /* page background around the panel */
  --panel-hi: #5a5e63;        /* brushed metal, light edge */
  --panel-lo: #34373b;        /* brushed metal, dark edge */
  --engraving: #d9dcdf;       /* white "printed" lettering on the panel */
  --engraving-dim: #9aa0a6;
  --glass: #070707;           /* display window */
  --segment-on: #ff3b1f;      /* red LED */
  --segment-off: rgba(255, 59, 31, 0.07);
  --amber: #ffb000;           /* amber readout and amber LEDs */
  --green: #39ff6a;           /* "online" and "selected" LEDs */
  --led-off: #2a2c2e;
  --key-face: #23262a;
  --key-edge: #0d0e10;
  --danger: #ff6b5a;
  --mono: "Consolas", "SFMono-Regular", "DejaVu Sans Mono", "Menlo", monospace;
  --sans: "Segoe UI", "Helvetica Neue", "Arial", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  /* Exactly the window's height (padding included, see box-sizing above):
     as long as the panel fits, the page does not scroll. dvh follows the
     visible height on phones, whose address bar comes and goes. */
  min-height: 100vh;
  min-height: 100dvh;
  padding: 24px 16px;
  background: radial-gradient(circle at 50% 0%, #1e2024, var(--room) 70%);
  color: var(--engraving);
  font-family: var(--sans);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ---------- the metal front panel ---------- */

.panel {
  position: relative;
  width: 100%;
  max-width: 820px;
  padding: 28px 32px 22px;
  border-radius: 10px;
  /* Fine horizontal lines on a vertical gradient read as brushed aluminium. */
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, var(--panel-hi), var(--panel-lo));
  box-shadow:
    0 1px 0 rgba(255,255,255,0.25) inset,
    0 -2px 0 rgba(0,0,0,0.4) inset,
    0 18px 40px rgba(0,0,0,0.6);
}

/* Four Phillips screws in the corners. */
.screw {
  position: absolute;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #c8cbcf, #6b6f74 70%);
  box-shadow: 0 1px 1px rgba(0,0,0,0.6);
}
.screw::before, .screw::after {
  content: ""; position: absolute; background: #3d4044;
  left: 50%; top: 50%; transform: translate(-50%, -50%);
}
.screw::before { width: 7px; height: 1.5px; }
.screw::after  { width: 1.5px; height: 7px; }
.screw.tl { top: 9px; left: 9px; }   .screw.tr { top: 9px; right: 9px; }
.screw.bl { bottom: 9px; left: 9px; } .screw.br { bottom: 9px; right: 9px; }

.panel-header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}
.brand {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 4px;
  text-shadow: 0 1px 0 rgba(0,0,0,0.5);
}
.subtitle {
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--engraving-dim);
  flex: 1;
}
/* The station callsign, like the engraved plate on a home-made rig. */
.callsign {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--amber);
  text-shadow: 0 0 6px rgba(255, 176, 0, 0.45);
}
.callsign:empty { display: none; }
.callsign-input { text-transform: uppercase; letter-spacing: 2px; }

.badge {
  font-family: var(--mono);
  font-size: 13px;
  padding: 2px 8px;
  border: 1px solid var(--engraving-dim);
  border-radius: 3px;
  letter-spacing: 2px;
}

/* ---------- display window + status ---------- */

.upper {
  display: grid;
  /* minmax(0, ...) lets the display shrink on narrow screens instead of
     pushing the panel wider than the window. */
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 22px;
  margin-bottom: 26px;
}

.display-window {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 16px 22px;
  min-height: 150px;
  background: var(--glass);
  border-radius: 6px;
  /* Recessed look: dark inner shadow plus a light lip under the window. */
  box-shadow:
    0 0 0 2px #1a1b1d,
    0 3px 12px rgba(0,0,0,0.9) inset,
    0 1px 0 rgba(255,255,255,0.18);
}

.seven-segment {
  height: 118px;
  flex: none;
  /* A slight slant, like real 7-segment LEDs. */
  transform: skewX(-6deg);
}
.seven-segment .seg { fill: var(--segment-off); }
.seven-segment .seg.on {
  fill: var(--segment-on);
  filter: drop-shadow(0 0 4px rgba(255, 59, 31, 0.8));
}

.readout { min-width: 0; }
.readout-label {
  font-family: var(--mono);
  font-size: 26px;
  color: var(--amber);
  text-shadow: 0 0 8px rgba(255, 176, 0, 0.55);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.readout-sub {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 13px;
  color: rgba(255, 176, 0, 0.55);
  letter-spacing: 2px;
}

.status-block {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 2px;
}
.led-row { display: flex; align-items: center; gap: 10px; }

.led {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--led-off);
  box-shadow: 0 0 0 2px #1b1c1e, 0 1px 2px rgba(0,0,0,0.8) inset;
  flex: none;
}
.led.on {
  background: radial-gradient(circle at 35% 35%, #d8ffe2, var(--green) 60%);
  box-shadow: 0 0 0 2px #1b1c1e, 0 0 10px var(--green);
}
.led.amber.on {
  background: radial-gradient(circle at 35% 35%, #fff1c9, var(--amber) 60%);
  box-shadow: 0 0 0 2px #1b1c1e, 0 0 10px var(--amber);
}

.meters {
  margin: 4px 0 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
}
.meters dt { color: var(--engraving-dim); }
.meters dd {
  margin: 0;
  font-family: var(--mono);
  color: var(--amber);
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- keypad ---------- */

.keypad {
  display: grid;
  /* app.js sets --columns: 4 keys per row for 8 positions, 3 for 6, ... */
  grid-template-columns: repeat(var(--columns, 4), minmax(0, 1fr));
  gap: 18px 16px;
}

.key-cell { display: flex; flex-direction: column; align-items: center; gap: 8px; }

/* Each key has its own indicator LED above it. */
.key-cell .led { width: 10px; height: 10px; }
.key-cell.pending .led { animation: blink 0.35s steps(2) infinite; }
@keyframes blink { 50% { background: var(--green); box-shadow: 0 0 8px var(--green); } }

.key {
  width: 100%;
  max-width: 120px;
  height: 64px;
  border: none;
  border-radius: 6px;
  background: linear-gradient(180deg, #33373c, var(--key-face));
  color: var(--engraving);
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 700;
  cursor: pointer;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.15) inset,
    0 4px 0 var(--key-edge),
    0 6px 10px rgba(0,0,0,0.5);
  transition: transform 60ms, box-shadow 60ms;
}
.key:hover:not(:disabled) { color: #fff; }
.key:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.1) inset, 0 1px 0 var(--key-edge), 0 2px 4px rgba(0,0,0,0.5);
}
.key:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
.key:disabled { cursor: not-allowed; opacity: 0.45; }

.key-cell.selected .key {
  color: var(--green);
  text-shadow: 0 0 10px rgba(57, 255, 106, 0.7);
}

/* The label "engraved" under each key. */
.key-label {
  min-height: 1.3em;
  max-width: 140px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--engraving-dim);
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.key-cell.selected .key-label { color: var(--engraving); }

.key-label-input {
  width: 100%;
  max-width: 140px;
  padding: 4px 6px;
  font: 12px var(--mono);
  color: var(--amber);
  background: var(--glass);
  border: 1px solid #555;
  border-radius: 3px;
  text-align: center;
}

/* ---------- footer ---------- */

.panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
  padding-top: 14px;
  border-top: 1px solid rgba(0,0,0,0.35);
  box-shadow: 0 1px 0 rgba(255,255,255,0.08) inset;
}
.status-line {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--engraving-dim);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.status-line.error { color: var(--danger); }

.footer-actions { display: flex; gap: 8px; flex: none; }
.small-key {
  padding: 7px 12px;
  border: none;
  border-radius: 4px;
  background: linear-gradient(180deg, #3a3e43, var(--key-face));
  color: var(--engraving);
  font: 11px var(--sans);
  letter-spacing: 2px;
  cursor: pointer;
  box-shadow: 0 2px 0 var(--key-edge);
}
.small-key:active { transform: translateY(1px); box-shadow: 0 1px 0 var(--key-edge); }
a.small-key { text-decoration: none; display: inline-block; }
.small-key.primary { color: var(--amber); }
.hidden { display: none !important; }

/* ---------- forms (login and settings pages) ---------- */

.panel.narrow { max-width: 560px; }

.form { display: flex; flex-direction: column; gap: 18px; }

.group {
  margin: 0;
  padding: 14px 16px 16px;
  border: 1px solid rgba(0,0,0,0.35);
  border-radius: 6px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.08) inset;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.group legend {
  padding: 0 6px;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--engraving-dim);
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field-name { font-size: 11px; letter-spacing: 2px; color: var(--engraving-dim); }

.glass-input {
  width: 100%;
  padding: 8px 10px;
  font: 14px var(--mono);
  color: var(--amber);
  background: var(--glass);
  border: 1px solid #1a1b1d;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.8) inset;
}
.glass-input:focus { outline: 2px solid var(--amber); outline-offset: 1px; }
.glass-input.short { max-width: 120px; }
select.glass-input option { background: #111; color: var(--amber); }

.choice { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; cursor: pointer; }
.choice input { accent-color: var(--amber); margin-top: 3px; }
.choice small { color: var(--engraving-dim); }

.hint { font-size: 12px; color: var(--engraving-dim); font-family: var(--mono); overflow-wrap: anywhere; white-space: pre-line; }

.form-actions { display: flex; justify-content: flex-end; gap: 10px; }

.warning {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--engraving-dim);
}

/* ---------- phones ---------- */

@media (max-width: 640px) {
  .panel { padding: 24px 16px 18px; }
  .panel-header { flex-wrap: wrap; }
  .upper { grid-template-columns: minmax(0, 1fr); }
  .display-window { min-height: 120px; padding: 12px 16px; gap: 16px; }
  .seven-segment { height: 90px; }
  .readout-label { font-size: 20px; }
  .keypad { grid-template-columns: repeat(min(var(--columns, 4), 3), minmax(0, 1fr)); gap: 14px 10px; }
  .key { height: 56px; font-size: 24px; }
  .panel-footer { flex-direction: column; align-items: stretch; }
}

/* ---------- console ---------- */

.console {
  width: 100%;
  max-width: 820px;
  margin-top: 14px;
  border-radius: 8px;
  background: var(--glass);
  box-shadow: 0 0 0 2px #1a1b1d, 0 8px 24px rgba(0,0,0,0.6);
  overflow: hidden;
}
.console-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: linear-gradient(180deg, var(--panel-hi), var(--panel-lo));
}
.console-title { flex: 1; font-size: 11px; letter-spacing: 3px; color: var(--engraving-dim); }
.console-option { font-size: 12px; color: var(--engraving-dim); display: flex; align-items: center; gap: 6px; cursor: pointer; }
.console-option input { accent-color: var(--amber); }
.console-lines {
  height: 260px;
  overflow-y: auto;
  padding: 8px 12px;
  font: 12px/1.5 var(--mono);
  color: #9fe8a8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.console-line.level-serial { color: #6a7480; }
.console-line.level-info   { color: #9fe8a8; }
.console-line.level-warn   { color: var(--amber); }
.console-line.level-error  { color: var(--danger); }

/* Red dot on the LOG key: an error arrived while the console was closed. */
.alert-dot {
  display: inline-block;
  width: 7px; height: 7px;
  margin-left: 6px;
  border-radius: 50%;
  background: var(--danger);
  box-shadow: 0 0 6px var(--danger);
  vertical-align: middle;
}

/* ---------- sound on/off: the last small key, bottom right of the panel ---------- */

.small-key.sound-toggle {
  width: 40px;
  padding: 5px 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.sound-toggle svg { width: 18px; height: 18px; fill: none; stroke: var(--amber); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sound-toggle .speaker { fill: var(--amber); }
.sound-toggle .mute { display: none; }
.sound-toggle.muted svg { stroke: var(--engraving-dim); }
.sound-toggle.muted .speaker { fill: var(--engraving-dim); }
.sound-toggle.muted .waves { display: none; }
.sound-toggle.muted .mute { display: inline; }
.sound-toggle:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

@media (max-width: 640px) {
  .console-lines { height: 200px; }
  .console-header { flex-wrap: wrap; }
}

/* ---------- API keys (settings page) ---------- */

.key-list { display: flex; flex-direction: column; gap: 6px; }
.key-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  background: rgba(0,0,0,0.25);
  border-radius: 4px;
}
.key-text { flex: 1; min-width: 0; font: 12px var(--mono); color: var(--engraving); overflow-wrap: anywhere; }
.key-new { display: flex; gap: 8px; }
.key-new .glass-input { flex: 1; min-width: 0; }
.key-created { display: flex; flex-direction: column; gap: 8px; }
.key-example { margin: 0; white-space: pre-wrap; }

/* A key whose action reconfigures the hardware. */
.small-key.danger { color: var(--danger); }
.key-badge { color: var(--danger); }
.form-actions.start { justify-content: flex-start; flex-wrap: wrap; }
.key-new .field { flex: 1; }

/* ---------- documentation pages (certificate, API) ---------- */

.panel.doc { max-width: 860px; line-height: 1.55; font-size: 14px; }
.panel.doc h2 {
  margin: 26px 0 8px;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--amber);
}
.panel.doc h3 { margin: 18px 0 6px; font-size: 14px; font-family: var(--mono); color: var(--engraving); }
.panel.doc p, .panel.doc li { color: var(--engraving); }
.panel.doc ol, .panel.doc ul { padding-left: 22px; }
.panel.doc a { color: var(--amber); }
.mono { font-family: var(--mono); }
.code, .panel.doc pre {
  margin: 8px 0;
  padding: 10px 12px;
  background: var(--glass);
  border-radius: 4px;
  font: 12px/1.5 var(--mono);
  color: #9fe8a8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.doc-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.doc-table th, .doc-table td { padding: 6px 8px; border-bottom: 1px solid rgba(0,0,0,0.35); text-align: left; vertical-align: top; }
.doc-table th { color: var(--engraving-dim); font-weight: normal; letter-spacing: 1px; }
.doc-table td:first-child, .doc-table td:nth-child(2) { font-family: var(--mono); white-space: nowrap; }
.method { color: var(--amber); }
.warning a, .hint a { color: var(--amber); }

/* A latched key: pressed in, with its label lit, like a rig's ON button.
   Used by LOG while the console is open. */
.small-key.active {
  color: var(--green);
  text-shadow: 0 0 8px rgba(57, 255, 106, 0.7);
  background: linear-gradient(180deg, #1c1f22, #2a2e33);
  transform: translateY(2px);
  box-shadow: 0 0 0 1px rgba(57, 255, 106, 0.35), 0 0 10px rgba(57, 255, 106, 0.25) inset;
}

/* The x in the console's title bar. */
.console-close {
  width: 28px; height: 28px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--engraving-dim);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.console-close:hover { color: var(--engraving); background: rgba(0,0,0,0.25); }
.console-close:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* ---------- install-as-app help ---------- */

.install-help-text {
  padding: 12px 16px 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--engraving);
}
.install-help-text a { color: var(--amber); }
.install-help-text ol { margin: 6px 0; padding-left: 22px; }

/* ---------- console tabs and request details ---------- */

.console-tabs { display: flex; gap: 4px; }
.console-tab {
  padding: 6px 12px;
  border: none;
  border-radius: 4px 4px 0 0;
  background: transparent;
  color: var(--engraving-dim);
  font: 11px var(--sans);
  letter-spacing: 3px;
  cursor: pointer;
}
.console-tab:hover { color: var(--engraving); }
.console-tab.active {
  color: var(--amber);
  background: rgba(0,0,0,0.35);
  box-shadow: 0 -2px 0 var(--amber) inset;
}
.console-tab:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.console-spacer { flex: 1; }

.console-line.has-details { cursor: pointer; }
.console-line.has-details:hover { background: rgba(255,255,255,0.05); }
.console-line.has-details::before { content: "▸ "; color: var(--engraving-dim); }
.console-line.has-details.open::before { content: "▾ "; }
.console-details {
  margin: 2px 0 8px 18px;
  padding: 8px 10px;
  border-left: 2px solid var(--amber);
  background: rgba(255,255,255,0.04);
  color: var(--engraving);
  font: 12px/1.5 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- certificate trust check ---------- */

.trust-check {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0;
  padding: 10px 14px;
  background: var(--glass);
  border-radius: 6px;
  font-size: 14px;
}
.trust-check #trust-text { flex: 1; }
.led.red.on {
  background: radial-gradient(circle at 35% 35%, #ffd0c8, var(--danger) 60%);
  box-shadow: 0 0 0 2px #1b1c1e, 0 0 10px var(--danger);
}
/* On documentation pages, hints are prose: normal font, normal wrapping. */
.panel.doc .hint { font-family: var(--sans); white-space: normal; }
.hint.error-text { color: var(--danger); }
/* Lines without details get the same indent as the "▸ " of clickable ones,
   so the columns (time, method or level, text) stay aligned. */
.console-line:not(.has-details)::before { content: "  "; white-space: pre; }

/* ---------- collapsible settings sections ---------- */

/* <details> sections: only the title shows until it is clicked. */
details.group.collapsible { display: block; padding: 0; }
details.group.collapsible > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--engraving-dim);
  user-select: none;
}
details.group.collapsible > summary::-webkit-details-marker { display: none; }
details.group.collapsible > summary::before { content: "▸"; color: var(--amber); font-size: 12px; }
details.group.collapsible[open] > summary::before { content: "▾"; }
details.group.collapsible > summary:hover { color: var(--engraving); }
details.group.collapsible > summary:focus-visible { outline: 2px solid var(--amber); outline-offset: -2px; border-radius: 6px; }
details.group.collapsible[open] { padding-bottom: 4px; }
details.group.collapsible[open] > summary { color: var(--amber); }
/* The section's content, with the spacing the open fieldsets have. */
details.group.collapsible > :not(summary) { margin: 0 16px 12px; }