:root {
  color-scheme: dark;
  --sky-top: #082539;
  --sky-mid: #315b74;
  --sky-low: #e7b067;
  --ink: #f7f0df;
  --muted: #bed1d5;
  --panel: rgba(5, 18, 28, 0.72);
  --line: rgba(255, 255, 255, 0.18);
  --signal: #ffd76d;
  --danger: #ff6b4a;
  --ok: #55e6a5;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at 18% 8%, rgba(255, 215, 109, 0.28), transparent 22rem),
    linear-gradient(180deg, var(--sky-top), var(--sky-mid) 52%, var(--sky-low));
  color: var(--ink);
  font-family: "Trebuchet MS", "Gill Sans", Verdana, sans-serif;
  overflow-x: hidden;
}

.stage-shell {
  margin: 0 auto;
  max-width: 1400px;
  min-height: 100vh;
  padding: clamp(14px, 2.4vw, 34px);
}

.briefing {
  align-items: end;
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin-bottom: 16px;
}

.eyebrow {
  color: var(--signal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0 0 7px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(42px, 8vw, 104px);
  letter-spacing: -0.07em;
  line-height: 0.84;
  margin: 0;
  text-shadow: 0 6px 26px rgba(0, 0, 0, 0.32);
}

.intel {
  display: grid;
  gap: 8px;
  min-width: min(420px, 100%);
}

.intel span {
  backdrop-filter: blur(12px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
  color: var(--muted);
  padding: 10px 14px;
  text-align: right;
}

.intel strong,
.intel a {
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
}

.radar-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.02)),
    rgba(2, 12, 20, 0.38);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 28px 90px rgba(1, 10, 17, 0.42);
  overflow: hidden;
  position: relative;
}

.upload-form {
  height: 0;
  overflow: hidden;
  position: absolute;
  width: 0;
}

.upload-form input {
  display: none;
}

.port-banner {
  color: var(--signal);
  font-weight: 900;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

canvas {
  display: block;
  height: auto;
  width: 100%;
}

.auth-panel {
  backdrop-filter: blur(14px);
  background: rgba(5, 18, 28, 0.86);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
  color: var(--ink);
  left: 50%;
  max-width: min(520px, calc(100% - 28px));
  padding: 20px;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  z-index: 3;
}

.auth-panel[hidden] {
  display: none;
}

.auth-panel h2 {
  margin: 0 0 8px;
}

.auth-panel p {
  color: var(--muted);
  margin: 0 0 14px;
}

.auth-panel form {
  display: grid;
  gap: 12px;
}

.auth-panel input[type="password"],
.auth-panel input[type="text"] {
  border: 0;
  border-radius: 12px;
  font: 900 20px/1 "Trebuchet MS", sans-serif;
  padding: 12px 14px;
  width: 100%;
}

.auth-panel button,
.auth-panel input[type="submit"] {
  background: var(--signal);
  border: 0;
  border-radius: 12px;
  color: #1d1609;
  cursor: pointer;
  font: 900 13px/1 "Trebuchet MS", sans-serif;
  min-height: 42px;
  padding: 0 14px;
  text-transform: uppercase;
}

.code-row {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(6, 1fr);
}

.code-row input[type="text"] {
  text-align: center;
}

.auth-close {
  background: rgba(255, 255, 255, 0.14);
  color: var(--ink);
}

@media (max-width: 820px) {
  .briefing {
    align-items: stretch;
    display: grid;
  }

  .intel span {
    text-align: left;
  }

}