:root {
  --bg: #0b0f0d; --panel: #151b18; --line: #24302a; --text: #e8f0ea; --muted: #8fa198;
  --accent: #39ff88; --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  --red: #e21b3c; --blue: #1368ce; --yellow: #d89e00; --green: #26890c;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, "Segoe UI", sans-serif; }
input, select { width: 100%; padding: 14px; border-radius: 10px; border: 1px solid var(--line); background: #0e1311; color: var(--text); font-size: 16px; }
.btn { appearance: none; border: 0; border-radius: 10px; padding: 14px 26px; font-size: 18px; font-weight: 700; cursor: pointer;
  background: var(--accent); color: #000; text-decoration: none; display: inline-block; text-align: center; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn:active { transform: translateY(1px); }
.err { color: #ff6b6b; min-height: 1.2em; }
.shape { width: 1.2em; height: 1.2em; flex: none; fill: #fff; }
.evlogo { display: block; height: 14vh; max-width: 40vw; object-fit: contain; margin: 0 auto 1vh; }
.evlogo[hidden] { display: none; }
/* "Presented by" sponsor badge, filled in by common.js */
.sponsor { display: inline-flex; align-items: center; gap: .45em; color: var(--muted); text-decoration: none; font-size: 14px; white-space: nowrap; }
.sponsor svg { height: 1.7em; width: 1.7em; flex: none; }
.sponsor b { color: #00d4ff; font-weight: 700; }