/* ============================================================================
   SirenSense — interactive device demos
   Inherits every colour, font and spacing token from ../style.css so the demo
   pages read as part of the site rather than as a bolted-on app.
   Load order: ../style.css  then  demo.css
   ========================================================================== */

/* ---------------------------------------------------------------- page shell */
.demo-page { background: var(--bench); color: var(--ink); }

.demo-top {
  border-bottom: 1px solid var(--rule);
  background: var(--bench-2);
}
.demo-top .demo-top-in {
  max-width: var(--max); margin: 0 auto; padding: 14px var(--gut);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  flex-wrap: wrap;
}
.demo-top .demo-brand {
  font-family: var(--mono); font-size: 13px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink); text-decoration: none;
}
.demo-top .demo-brand b { color: var(--active); font-weight: 700; }
.demo-top .demo-crumb {
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); text-decoration: none;
}
.demo-top .demo-crumb:hover { color: var(--active); }

.demo-main {
  max-width: var(--max); margin: 0 auto; padding: 34px var(--gut) 56px;
}
.demo-head { margin-bottom: 26px; }
.demo-head .demo-eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--active); margin: 0 0 10px;
}
.demo-head h1 {
  font-family: var(--sans); font-size: clamp(26px, 3.6vw, 40px); line-height: 1.14;
  letter-spacing: -.015em; margin: 0 0 12px; color: var(--ink);
}
.demo-head p {
  font-size: 16px; line-height: 1.65; color: var(--ink-2); margin: 0; max-width: 68ch;
}

/* two column: device, then guide */
.demo-split {
  display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(290px, 1fr);
  gap: 28px; align-items: start;
}
@media (max-width: 900px) { .demo-split { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------------- device */
.demo-device {
  background: var(--bench-3);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 14px;
}
.demo-stage {
  position: relative; width: 100%; height: 0; padding-bottom: 66.6667%;
  overflow: hidden; background: #050b08;
}
.demo-stage--43 { padding-bottom: 75%; }
.demo-screen {
  position: absolute; left: 50%; top: 50%; width: 480px; height: 320px;
  transform-origin: center; background: var(--hbg); overflow: hidden;
  font-family: var(--mono);
}
.demo-stage--43 .demo-screen { width: 320px; height: 240px; }
.demo-screen::before {
  content: ""; position: absolute; inset: 0; z-index: 99; pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,.20) 0 1px, transparent 1px 3px);
}
.demo-screen::after {
  content: ""; position: absolute; inset: 0; z-index: 98; pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 62%, rgba(0,0,0,.48) 100%);
}
.demo-cap {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  margin-top: 12px; font-family: var(--mono); font-size: 12px; color: var(--ink-3);
}
.demo-cap b { color: var(--ink); font-weight: 700; }

/* -------------------------------------------------------------------- guide */
.demo-guide {
  background: var(--bench-3); border: 1px solid var(--rule); border-radius: 4px;
  padding: 22px 20px 20px;
}
.demo-guide .demo-stepno {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--active); margin: 0 0 10px;
}
.demo-guide h2 {
  font-family: var(--sans); font-size: 19px; line-height: 1.3; margin: 0 0 10px;
  color: var(--ink); letter-spacing: -.01em;
}
.demo-guide p {
  font-size: 14.5px; line-height: 1.68; color: var(--ink-2); margin: 0 0 14px;
}
.demo-guide p b { color: var(--ink); }
.demo-press {
  display: inline-block; font-family: var(--mono); font-size: 12.5px; font-weight: 700;
  background: var(--active); color: #fff; padding: 5px 11px; border-radius: 3px;
  letter-spacing: .06em; margin-bottom: 14px;
}
.demo-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.demo-btn {
  font-family: var(--mono); font-size: 13px; letter-spacing: .04em;
  padding: 10px 16px; border: 1px solid var(--rule); border-radius: 3px;
  background: var(--bench); color: var(--ink); cursor: pointer;
}
.demo-btn:hover { border-color: var(--active); color: var(--active); }
.demo-btn--main { background: var(--ink); border-color: var(--ink); color: var(--on-ink); font-weight: 700; }
.demo-btn--main:hover { background: var(--active); border-color: var(--active); color: #fff; }
.demo-btn[disabled] { opacity: .4; cursor: default; }
.demo-btn[disabled]:hover { border-color: var(--rule); color: var(--ink); }

.demo-keys { margin-top: 24px; border-top: 1px solid var(--rule); padding-top: 16px; }
.demo-keys h3 {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 400; margin: 0 0 12px;
}
.demo-keys dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; margin: 0; }
.demo-keys dt {
  font-family: var(--mono); font-size: 12.5px; font-weight: 700; color: var(--active);
  white-space: nowrap;
}
.demo-keys dd { font-size: 14px; color: var(--ink-2); margin: 0; }

/* --------------------------------------------------- tour highlight ring */
.demo-screen .hl {
  outline: 2px solid var(--active); outline-offset: 2px;
  animation: demo-hl 1.3s ease-in-out infinite;
}
@keyframes demo-hl { 50% { outline-color: rgba(138,81,0,.15); } }

/* ------------------------------------------------------------ intro modal */
.demo-intro {
  position: fixed; inset: 0; z-index: 200; background: rgba(20,24,26,.72);
  display: flex; align-items: center; justify-content: center; padding: 22px;
}
.demo-intro[hidden] { display: none; }
.demo-intro .demo-intro-card {
  background: var(--bench-3); border: 1px solid var(--rule); border-radius: 4px;
  max-width: 560px; padding: 30px 28px 26px;
}
.demo-intro .demo-eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--active); margin: 0 0 10px;
}
.demo-intro h2 {
  font-family: var(--sans); font-size: 26px; line-height: 1.2; margin: 0 0 14px;
  color: var(--ink); letter-spacing: -.015em;
}
.demo-intro p { font-size: 15px; line-height: 1.68; color: var(--ink-2); margin: 0 0 12px; }

/* ----------------------------------------------------- hover explanation */
.demo-tip {
  position: fixed; z-index: 300; max-width: 260px; padding: 9px 12px; border-radius: 3px;
  background: var(--ink); color: var(--on-ink);
  font-family: var(--mono); font-size: 12px; line-height: 1.5; pointer-events: none;
  display: none;
}

/* ================================ DEVICE SCREEN (unchanged device interface) */
:root {
  --hgreen: #00ff46; --hgreen2: #00c83c; --hgreen3: #009632; --hgreen4: #005f23;
  --hamber: #ffb000; --hred: #ff3c28; --hbg: #050b08; --hink: #0a140d;
}
.demo-screen .hud {
  position: absolute; inset: 0; z-index: 1; display: flex; flex-direction: column;
  padding: 8px 10px; color: var(--hgreen);
  background-image: linear-gradient(rgba(0,255,70,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,70,.05) 1px, transparent 1px);
  background-size: 20px 20px;
}
.demo-boot {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 14px; z-index: 10; transition: opacity .5s;
}
.demo-boot .logo {
  font-size: 44px; font-weight: 700; letter-spacing: .05em; color: var(--hgreen);
  text-shadow: 0 0 18px var(--hgreen); text-align: center;
}
.demo-boot .sub {
  font-size: 12px; color: var(--hgreen2); letter-spacing: .28em; text-transform: uppercase;
  text-align: center;
}
.demo-boot.hidden { opacity: 0; pointer-events: none; }
.demo-hudmain { flex: 1; display: none; flex-direction: column; gap: 8px; }
.demo-hudmain.on { display: flex; }
.demo-hudmain header {
  display: flex; justify-content: space-between; align-items: baseline;
  border-bottom: 1px solid var(--hgreen4); padding-bottom: 4px;
}
.demo-hudmain header .t { font-size: 13px; font-weight: 700; letter-spacing: .03em; color: var(--hgreen); }
.demo-hudmain header .t b { color: var(--hgreen2); font-weight: 400; }
.demo-hudmain header .clock { font-size: 11px; color: var(--hgreen2); }
.demo-screens { flex: 1; position: relative; }
.demo-scr { position: absolute; inset: 0; display: none; }
.demo-scr.on { display: grid; }
.demo-grid { gap: 8px 10px; }
.demo-g2 { grid-template-columns: 1fr 1fr; }
.demo-g3 { grid-template-columns: 1fr 1fr 1fr; }
.demo-tile {
  background: var(--hink); border: 1px solid var(--hgreen4); border-radius: 5px;
  padding: 8px 7px; display: flex; flex-direction: column; justify-content: center;
}
.demo-tile .k { font-size: 7px; letter-spacing: .15em; color: var(--hgreen3); text-transform: uppercase; }
.demo-tile .v { font-size: 24px; font-weight: 700; line-height: 1.02; margin-top: 2px; }
.demo-tile .s { font-size: 7px; color: var(--hgreen3); margin-top: 2px; }
.demo-tile.big .v { font-size: 30px; }
.demo-v-green { color: var(--hgreen); text-shadow: 0 0 8px var(--hgreen3); }
.demo-v-amber { color: var(--hamber); text-shadow: 0 0 8px var(--hamber); }
.demo-v-red { color: var(--hred); text-shadow: 0 0 8px var(--hred); animation: demo-blink 1s steps(2) infinite; }
.demo-v-dim { color: var(--hgreen3); }
@keyframes demo-blink { 50% { opacity: .35; } }
.demo-banner {
  grid-column: 1 / -1; border: 1px solid var(--hgreen3); border-radius: 6px;
  display: flex; align-items: center; justify-content: center; text-align: center;
  gap: 8px; padding: 6px; background: var(--hink);
}
.demo-banner .big { font-size: 19px; font-weight: 700; letter-spacing: .02em; }
.demo-banner .mid { font-size: 10px; color: var(--hgreen2); }
.demo-banner.amber { border-color: var(--hamber); color: var(--hamber); text-shadow: 0 0 10px var(--hamber); animation: demo-flash .8s steps(2) infinite; }
.demo-banner.red { border-color: var(--hred); color: var(--hred); text-shadow: 0 0 12px var(--hred); animation: demo-flash .5s steps(2) infinite; }
@keyframes demo-flash { 50% { background: #1a0a00; } }
.demo-dots { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; grid-column: 1 / -1; }
.demo-dot { display: flex; align-items: center; gap: 3px; font-size: 9px; color: var(--hgreen3); }
.demo-dot i { width: .9em; height: .9em; border-radius: 50%; background: var(--hgreen4); display: inline-block; }
.demo-dot.on i { background: var(--hgreen); box-shadow: 0 0 6px var(--hgreen); }
.demo-dot.bad i { background: var(--hred); box-shadow: 0 0 6px var(--hred); }
.demo-overlay {
  position: absolute; inset: 0; z-index: 90; display: none; align-items: center;
  justify-content: center; flex-direction: column; text-align: center;
  background: rgba(5,11,8,.93);
}
.demo-overlay.on { display: flex; }
.demo-overlay.red { color: var(--hred); }
.demo-overlay.amber { color: var(--hamber); }
.demo-overlay .big {
  font-size: 34px; font-weight: 700; text-shadow: 0 0 24px currentColor;
  animation: demo-flash .45s steps(2) infinite;
}
.demo-overlay .dir { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.demo-overlay .dir .w { font-size: 15px; font-weight: 700; letter-spacing: .05em; }
.demo-overlay .mid { font-size: 14px; margin-top: 4px; letter-spacing: .08em; }
.demo-overlay .sub { font-size: 9px; color: var(--hgreen2); margin-top: 6px; }
.demo-overlay svg { width: 42px; height: 42px; display: block; transition: transform .3s; }

/* transponder layout specifics */
.demo-tp-grid {
  flex: 1; display: grid; grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr 1fr auto; gap: 6px 8px;
}
.demo-tp-grid .demo-tile .v { font-size: 18px; }
.demo-leds { grid-column: 1 / -1; display: flex; justify-content: space-around; padding: 2px 10px; }
.demo-led { display: flex; flex-direction: column; align-items: center; gap: 3px; font-size: 6px; color: var(--hgreen3); }
.demo-led i { width: 13px; height: 13px; border-radius: 50%; background: var(--hgreen4); display: block; }
.demo-led.on i { background: var(--hgreen); box-shadow: 0 0 8px var(--hgreen); animation: demo-blink 1s steps(2) infinite; }
.demo-led.bad i { background: var(--hred); box-shadow: 0 0 8px var(--hred); animation: demo-blink .6s steps(2) infinite; }