:root {
  --demo-navy: #071827;
  --demo-navy-2: #0d253a;
  --demo-gold: #d8c27a;
  --demo-paper: #f5f7fa;
  --demo-ink: #172033;
  --demo-muted: #667387;
  --demo-line: rgba(7, 24, 39, 0.16);
}

.demo-page { background: linear-gradient(180deg, #f8fafc 0, #eef3f8 100%); }
.demo-main-nav { gap: .65rem; }
.demo-main-nav a[aria-current="page"] { background: var(--demo-gold); color: var(--demo-navy); }

.demo-intro { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr); gap: 2rem; padding-top: 3.2rem; padding-bottom: 2rem; align-items: start; }
.demo-intro h1 { max-width: 850px; margin: .3rem 0 1rem; font-size: clamp(2.35rem, 5vw, 4.8rem); line-height: .98; color: var(--demo-navy); }
.demo-lead { max-width: 780px; font-size: 1.12rem; color: var(--demo-muted); }
.demo-notice { margin-top: 1.25rem; display: flex; gap: .8rem; align-items: flex-start; padding: 1rem 1.1rem; border-radius: 16px; border: 1px solid rgba(216,194,122,.55); background: #fffaf0; color: var(--demo-ink); }
.demo-notice strong { flex: 0 0 auto; color: var(--demo-navy); }
.demo-notice span { color: var(--demo-muted); }
.demo-guide-card { background: var(--demo-navy); color: #fff; border: 1px solid rgba(216,194,122,.48); border-radius: 24px; padding: 1.35rem; box-shadow: 0 18px 45px rgba(7,24,39,.18); }
.demo-card-kicker { margin: 0 0 .8rem; color: var(--demo-gold); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; }
.demo-guide-card ol { margin: 0; padding-left: 1.25rem; display: grid; gap: .65rem; color: #dbe5ee; }

.demo-stage-wrap { padding-top: 1rem; padding-bottom: 4rem; }
.demo-toolbar { background: #fff; border: 1px solid var(--demo-line); border-radius: 20px; padding: .9rem 1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; box-shadow: 0 12px 36px rgba(7,24,39,.08); margin-bottom: 1.4rem; }
.demo-toolbar > div:first-child { display: grid; grid-template-columns: auto 1fr; column-gap: .65rem; align-items: center; }
.demo-toolbar small { grid-column: 2; color: var(--demo-muted); }
.demo-status-dot { width: 11px; height: 11px; border-radius: 50%; background: #2f9e63; box-shadow: 0 0 0 5px rgba(47,158,99,.12); grid-row: 1 / span 2; }
.demo-toolbar-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.demo-button, .cable-action { border: 0; border-radius: 999px; min-height: 42px; padding: .7rem 1rem; font: inherit; font-weight: 800; cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.demo-button:hover, .cable-action:hover { transform: translateY(-1px); }
.demo-button.primary, .cable-action { background: var(--demo-gold); color: var(--demo-navy); box-shadow: 0 8px 20px rgba(216,194,122,.25); }
.demo-button.secondary { background: #edf2f6; color: var(--demo-navy); border: 1px solid var(--demo-line); }

.device-demo-grid { display: grid; grid-template-columns: minmax(350px, .72fr) minmax(190px, .36fr) minmax(600px, 1.45fr); gap: 1.4rem; align-items: center; }
.device-zone { min-width: 0; }
.device-zone-label { display: flex; gap: .75rem; align-items: center; margin-bottom: .8rem; color: var(--demo-navy); }
.device-zone-label > span { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--demo-gold); font-weight: 900; }
.device-zone-label div { display: grid; }
.device-zone-label strong { font-size: 1.08rem; }
.device-zone-label small { color: var(--demo-muted); }
.device-help { margin: .75rem auto 0; max-width: 620px; text-align: center; color: var(--demo-muted); font-size: .88rem; }

.phone-device { position: relative; width: min(100%, 410px); height: 790px; margin: 0 auto; border: 12px solid #07131f; border-radius: 52px; background: #07131f; box-shadow: 0 28px 70px rgba(7,24,39,.28), inset 0 0 0 1px #2c3d4d; }
.phone-device::before, .phone-device::after { content: ""; position: absolute; left: -17px; width: 5px; border-radius: 5px; background: #263644; }
.phone-device::before { top: 145px; height: 70px; }
.phone-device::after { top: 232px; height: 48px; }
.phone-speaker { position: absolute; top: 8px; left: 50%; transform: translateX(-50%); width: 98px; height: 24px; background: #07131f; border-radius: 0 0 18px 18px; z-index: 3; }
.phone-screen { width: 100%; height: 100%; overflow: hidden; border-radius: 40px; background: var(--demo-navy); }
.phone-screen iframe, .laptop-screen iframe { display: block; width: 100%; height: 100%; border: 0; background: var(--demo-navy); }

.laptop-device { width: 100%; margin: 0 auto; }
.laptop-screen-shell { position: relative; background: #07131f; border: 12px solid #07131f; border-bottom-width: 18px; border-radius: 22px 22px 12px 12px; box-shadow: 0 30px 70px rgba(7,24,39,.24); }
.laptop-camera { position: absolute; top: -7px; left: 50%; width: 5px; height: 5px; border-radius: 50%; background: #71849a; z-index: 2; }
.laptop-screen { height: 610px; overflow: hidden; border-radius: 10px 10px 5px 5px; background: var(--demo-navy); }
.laptop-base { height: 25px; margin: 0 -5%; background: linear-gradient(#d8dee5, #9ca8b5); border-radius: 3px 3px 18px 18px; box-shadow: 0 14px 28px rgba(7,24,39,.16); position: relative; }
.laptop-base span { position: absolute; left: 43%; right: 43%; top: 0; height: 7px; background: #8f9aa6; border-radius: 0 0 8px 8px; }

.handoff-zone { text-align: center; padding: 1rem .4rem; }
.cable-label { display: grid; gap: .2rem; margin-bottom: 1.1rem; }
.cable-label strong { color: var(--demo-navy); }
.cable-label small { color: var(--demo-muted); }
.cable-visual { display: grid; grid-template-columns: 28px 1fr 28px; align-items: center; width: 100%; margin: 1.2rem 0; }
.cable-line { height: 9px; background: #1d2c3a; position: relative; box-shadow: inset 0 1px 2px rgba(255,255,255,.18); }
.cable-plug { width: 28px; height: 24px; background: #203241; border: 3px solid #07131f; }
.cable-plug.left { border-radius: 7px 2px 2px 7px; }
.cable-plug.right { border-radius: 2px 7px 7px 2px; }
#transfer-packet { position: absolute; width: 20px; height: 20px; top: 50%; left: 0; transform: translate(-50%,-50%) scale(0); border-radius: 5px; background: var(--demo-gold); box-shadow: 0 0 0 6px rgba(216,194,122,.18); }
.cable-visual.transferring #transfer-packet { animation: demo-transfer 1.15s ease-in-out forwards; }
@keyframes demo-transfer { 0% { left: 0; transform: translate(-50%,-50%) scale(.8) rotate(0); } 50% { transform: translate(-50%,-85%) scale(1.05) rotate(8deg); } 100% { left: 100%; transform: translate(-50%,-50%) scale(.8) rotate(0); } }
.cable-action { width: 100%; border-radius: 14px; }
.handoff-zone p { color: var(--demo-muted); font-size: .8rem; line-height: 1.45; }

.demo-explainer { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding-bottom: 4rem; }
.demo-explainer article { background: #fff; border: 1px solid var(--demo-line); border-radius: 20px; padding: 1.25rem; }
.demo-explainer span { display: inline-flex; padding: .3rem .6rem; border-radius: 999px; background: rgba(216,194,122,.22); color: var(--demo-navy); font-weight: 900; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; }
.demo-explainer h2 { margin: .75rem 0 .45rem; color: var(--demo-navy); font-size: 1.15rem; }
.demo-explainer p { margin: 0; color: var(--demo-muted); }
.demo-footer { margin-top: 0; }

@media (max-width: 1220px) {
  .device-demo-grid { grid-template-columns: minmax(330px, .78fr) minmax(150px, .28fr) minmax(500px, 1.25fr); }
  .laptop-screen { height: 540px; }
  .phone-device { height: 730px; }
}

@media (max-width: 980px) {
  .demo-intro { grid-template-columns: 1fr; }
  .device-demo-grid { grid-template-columns: 1fr; gap: 2rem; }
  .handoff-zone { width: min(520px, 100%); margin: 0 auto; }
  .cable-visual { transform: rotate(90deg); width: 180px; margin: 5rem auto; }
  .cable-action { max-width: 420px; }
  .laptop-screen { height: 520px; }
  .demo-explainer { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .demo-intro { padding-top: 2rem; }
  .demo-intro h1 { font-size: clamp(2.15rem, 12vw, 3.4rem); }
  .demo-notice { flex-direction: column; }
  .demo-toolbar { align-items: stretch; flex-direction: column; }
  .demo-toolbar-actions { display: grid; grid-template-columns: 1fr; }
  .phone-device { height: 700px; border-width: 9px; border-radius: 42px; }
  .phone-screen { border-radius: 32px; }
  .laptop-screen { height: 430px; }
  .laptop-screen-shell { border-width: 8px; border-bottom-width: 12px; }
  .demo-main-nav { display: none; }
}

.demo-button:disabled,
.cable-action:disabled {
  cursor: not-allowed;
  opacity: .55;
  transform: none;
  box-shadow: none;
}