/* AirBeam — 시안/바이올렛 네온 · 빛으로 건네는 전송 */
.airbeam {
  --ab-bg: #070a14;
  --ab-bg2: #0d1424;
  --ab-panel: #111a2e;
  --ab-line: #1e2b45;
  --ab-cyan: #34e3ff;
  --ab-violet: #a679ff;
  --ab-text: #eaf1fb;
  --ab-muted: #8494b0;
  --ab-warn: #ffcf6b;
  --ab-ok: #55e6a5;
  --ab-mono: "Share Tech Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --ab-display: "Orbitron", var(--ab-mono);

  color: var(--ab-text);
  background:
    radial-gradient(1200px 600px at 50% -8%, rgba(52,227,255,.10), transparent 60%),
    radial-gradient(900px 500px at 85% 120%, rgba(166,121,255,.10), transparent 60%),
    var(--ab-bg);
  min-height: 100vh;
  padding: clamp(20px, 5vw, 56px) 16px 80px;
}

.airbeam * { box-sizing: border-box; }
.ab-hidden { display: none !important; }

.ab-wrap { max-width: 560px; margin: 0 auto; }

/* ── 헤더 ─────────────────────────────── */
.ab-head { text-align: center; margin-bottom: 26px; }
.ab-logo {
  font-family: var(--ab-display);
  font-weight: 700;
  font-size: clamp(30px, 8vw, 46px);
  letter-spacing: .04em;
  background: linear-gradient(100deg, var(--ab-cyan), var(--ab-violet));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 22px rgba(52,227,255,.25));
  margin: 0;
}
.ab-tagline {
  font-family: var(--ab-mono);
  color: var(--ab-muted);
  font-size: 13px; letter-spacing: .06em;
  margin: 8px 0 0;
}
.ab-lead {
  color: var(--ab-muted);
  font-size: 14px; line-height: 1.7;
  max-width: 420px; margin: 14px auto 0;
}

/* ── 탭 ───────────────────────────────── */
.ab-tabs {
  display: flex; gap: 6px;
  background: var(--ab-bg2);
  border: 1px solid var(--ab-line);
  border-radius: 14px; padding: 6px;
  margin: 24px auto 20px; max-width: 320px;
}
.ab-tab {
  flex: 1; border: 0; cursor: pointer;
  font-family: var(--ab-mono); font-size: 14px; letter-spacing: .04em;
  padding: 11px 0; border-radius: 10px;
  background: transparent; color: var(--ab-muted);
  transition: .18s;
}
.ab-tab-active {
  color: #04121b;
  background: linear-gradient(100deg, var(--ab-cyan), var(--ab-violet));
  box-shadow: 0 6px 20px rgba(52,227,255,.22);
}

/* ── 패널 ─────────────────────────────── */
.ab-panel {
  background: linear-gradient(180deg, var(--ab-panel), var(--ab-bg2));
  border: 1px solid var(--ab-line);
  border-radius: 20px;
  padding: 22px;
}
.ab-field-label {
  font-family: var(--ab-mono); font-size: 12px;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--ab-muted); margin: 0 0 8px;
}
.ab-text-input {
  width: 100%; min-height: 128px; resize: vertical;
  background: var(--ab-bg); color: var(--ab-text);
  border: 1px solid var(--ab-line); border-radius: 12px;
  padding: 14px; font-size: 15px; line-height: 1.6;
  font-family: inherit;
}
.ab-text-input:focus { outline: none; border-color: var(--ab-cyan); box-shadow: 0 0 0 3px rgba(52,227,255,.15); }

.ab-or {
  display: flex; align-items: center; gap: 12px;
  color: var(--ab-muted); font-family: var(--ab-mono);
  font-size: 12px; letter-spacing: .1em; margin: 16px 0;
}
.ab-or::before, .ab-or::after { content: ""; flex: 1; height: 1px; background: var(--ab-line); }

.ab-file-drop {
  display: block; text-align: center; cursor: pointer;
  border: 1px dashed var(--ab-line); border-radius: 12px;
  padding: 18px; color: var(--ab-muted); font-size: 14px;
  transition: .18s;
}
.ab-file-drop:hover { border-color: var(--ab-cyan); color: var(--ab-text); }
.ab-file-drop input { display: none; }

.ab-btn {
  width: 100%; border: 0; cursor: pointer; margin-top: 18px;
  padding: 15px; border-radius: 12px;
  font-family: var(--ab-mono); font-size: 15px; letter-spacing: .05em;
  color: #04121b; font-weight: 700;
  background: linear-gradient(100deg, var(--ab-cyan), var(--ab-violet));
  box-shadow: 0 8px 26px rgba(52,227,255,.24);
  transition: .18s;
}
.ab-btn:hover { transform: translateY(-1px); filter: brightness(1.06); }
.ab-btn-ghost {
  background: transparent; color: var(--ab-muted);
  border: 1px solid var(--ab-line); box-shadow: none; font-weight: 400;
}
.ab-btn-ghost:hover { color: var(--ab-text); border-color: var(--ab-cyan); filter: none; }

.ab-note {
  margin-top: 14px; padding: 11px 13px; border-radius: 10px;
  font-size: 13px; line-height: 1.55;
}
.ab-note-warn { background: rgba(255,207,107,.10); color: var(--ab-warn); border: 1px solid rgba(255,207,107,.25); }
.ab-note-ok { background: rgba(85,230,165,.10); color: var(--ab-ok); border: 1px solid rgba(85,230,165,.25); }

/* ── 프리셋 ───────────────────────────── */
.ab-presets { display: flex; gap: 8px; margin-top: 16px; }
.ab-preset {
  flex: 1; cursor: pointer;
  background: var(--ab-bg); border: 1px solid var(--ab-line);
  color: var(--ab-muted); border-radius: 10px; padding: 9px 0;
  font-family: var(--ab-mono); font-size: 13px; letter-spacing: .04em;
  transition: .16s;
}
.ab-preset-active { color: var(--ab-cyan); border-color: var(--ab-cyan); background: rgba(52,227,255,.06); }

/* ── 빔 무대 (송신 QR) ─────────────────── */
.ab-beam-stage { text-align: center; }
.ab-qr-frame {
  position: relative; width: min(340px, 80vw); aspect-ratio: 1;
  margin: 6px auto 18px; border-radius: 20px;
  background: #fff; padding: 16px;
  box-shadow: 0 0 0 1px var(--ab-line),
              0 0 40px rgba(52,227,255,.28),
              0 0 90px rgba(166,121,255,.18);
  animation: ab-pulse 2.6s ease-in-out infinite;
}
@keyframes ab-pulse {
  0%,100% { box-shadow: 0 0 0 1px var(--ab-line), 0 0 34px rgba(52,227,255,.22), 0 0 80px rgba(166,121,255,.14); }
  50%     { box-shadow: 0 0 0 1px var(--ab-line), 0 0 52px rgba(52,227,255,.40), 0 0 110px rgba(166,121,255,.26); }
}
#ab-qr-canvas { width: 100%; height: 100%; display: block; image-rendering: pixelated; border-radius: 6px; }
.ab-beam-meta {
  font-family: var(--ab-mono); font-size: 13px; color: var(--ab-muted);
  letter-spacing: .03em; margin-bottom: 6px;
}
.ab-beam-help { font-size: 14px; color: var(--ab-text); line-height: 1.65; margin: 4px auto 18px; max-width: 380px; }
.ab-beam-help b { color: var(--ab-cyan); font-weight: 600; }

.ab-fps-row {
  display: flex; align-items: center; gap: 12px;
  background: var(--ab-bg); border: 1px solid var(--ab-line);
  border-radius: 12px; padding: 12px 14px; margin-bottom: 10px;
}
.ab-fps-row label { font-family: var(--ab-mono); font-size: 12px; color: var(--ab-muted); letter-spacing: .06em; white-space: nowrap; }
.ab-fps-row input[type=range] { flex: 1; accent-color: var(--ab-cyan); }
#ab-fps-val { font-family: var(--ab-mono); font-size: 13px; color: var(--ab-cyan); min-width: 58px; text-align: right; }

/* ── 스캔 무대 (수신) ─────────────────── */
.ab-scan-stage { text-align: center; }
.ab-video-frame {
  position: relative; width: min(340px, 80vw); aspect-ratio: 1;
  margin: 0 auto 16px; border-radius: 20px; overflow: hidden;
  background: #000; border: 1px solid var(--ab-line);
  box-shadow: 0 0 40px rgba(52,227,255,.18);
}
#ab-video { width: 100%; height: 100%; object-fit: cover; }
.ab-scan-frame {
  position: absolute; inset: 14px; border-radius: 14px;
  border: 2px solid rgba(52,227,255,.55);
  box-shadow: 0 0 24px rgba(52,227,255,.35) inset;
  pointer-events: none;
}
.ab-scan-frame::after {
  content: ""; position: absolute; left: 6%; right: 6%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--ab-cyan), transparent);
  animation: ab-scanline 2.2s ease-in-out infinite;
}
@keyframes ab-scanline { 0%,100% { top: 8%; opacity: .3; } 50% { top: 90%; opacity: 1; } }

.ab-progress { background: var(--ab-bg); border: 1px solid var(--ab-line); border-radius: 12px; padding: 14px; margin-bottom: 12px; }
.ab-progress-top { display: flex; justify-content: space-between; font-family: var(--ab-mono); font-size: 13px; margin-bottom: 8px; }
.ab-progress-top .lbl { color: var(--ab-muted); letter-spacing: .06em; }
#ab-recv-count { color: var(--ab-cyan); }
.ab-bar-track { height: 6px; background: var(--ab-line); border-radius: 99px; overflow: hidden; }
#ab-recv-bar { height: 100%; width: 0; border-radius: 99px; background: linear-gradient(90deg, var(--ab-cyan), var(--ab-violet)); transition: width .2s; }

.ab-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(9px, 1fr)); gap: 3px; margin: 12px 0; }
.ab-cell { aspect-ratio: 1; border-radius: 2px; background: var(--ab-line); transition: .15s; }
.ab-cell-on { background: linear-gradient(135deg, var(--ab-cyan), var(--ab-violet)); box-shadow: 0 0 6px rgba(52,227,255,.5); }

.ab-recv-hint { color: var(--ab-muted); font-size: 14px; line-height: 1.6; margin: 6px 0 16px; }

/* ── 결과 ─────────────────────────────── */
.ab-result { text-align: center; }
.ab-result-title { font-family: var(--ab-display); font-size: 20px; letter-spacing: .03em; margin: 4px 0 18px; color: var(--ab-ok); }
#ab-result-text {
  width: 100%; min-height: 140px; resize: vertical;
  background: var(--ab-bg); color: var(--ab-text);
  border: 1px solid var(--ab-line); border-radius: 12px;
  padding: 14px; font-size: 15px; line-height: 1.6; font-family: inherit;
}
.ab-dl {
  display: inline-block; text-decoration: none; margin: 4px 0 6px;
  padding: 15px 22px; border-radius: 12px;
  font-family: var(--ab-mono); font-size: 15px; color: #04121b; font-weight: 700;
  background: linear-gradient(100deg, var(--ab-cyan), var(--ab-violet));
  box-shadow: 0 8px 26px rgba(52,227,255,.24);
}
.ab-result-actions { display: flex; gap: 10px; margin-top: 16px; }
.ab-result-actions > * { flex: 1; margin-top: 0 !important; }

/* ── 하단 안내 ────────────────────────── */
.ab-foot {
  margin: 26px auto 0; max-width: 480px;
  color: var(--ab-muted); font-size: 12.5px; line-height: 1.7; text-align: center;
}
.ab-foot b { color: var(--ab-text); font-weight: 600; }

/* ── 인앱 브라우저 안내 배너 ──────────── */
.ab-inapp {
  background: linear-gradient(180deg, rgba(255,207,107,.10), rgba(255,207,107,.04));
  border: 1px solid rgba(255,207,107,.30);
  border-radius: 16px; padding: 16px 18px; margin: 0 auto 18px; max-width: 460px;
}
.ab-inapp-title { margin: 0 0 6px; font-size: 15px; color: var(--ab-warn); font-weight: 600; }
.ab-inapp-body { margin: 0 0 12px; font-size: 13px; line-height: 1.6; color: var(--ab-text); }
.ab-inapp-actions { display: flex; gap: 8px; }
.ab-inapp-btn {
  flex: 1; cursor: pointer; border: 0; border-radius: 10px; padding: 11px 0;
  font-family: var(--ab-mono); font-size: 13px; letter-spacing: .03em; font-weight: 700;
  color: #2a1c00; background: var(--ab-warn);
}
.ab-inapp-btn-ghost { background: transparent; color: var(--ab-warn); border: 1px solid rgba(255,207,107,.4); font-weight: 400; }

/* ── 송출 모드 (CRT 지지직) ───────────── */
.ab-qr-frame { overflow: hidden; }
.ab-crt { position: absolute; inset: 0; pointer-events: none; border-radius: 20px; overflow: hidden; }
.ab-noise { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .16; mix-blend-mode: overlay; }
.ab-scanlines {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0,0,0,.13) 0px, rgba(0,0,0,.13) 1px,
    transparent 1px, transparent 3px
  );
  animation: ab-scan-drift 8s linear infinite;
}
@keyframes ab-scan-drift { 0% { transform: translateY(0); } 100% { transform: translateY(3px); } }
.ab-vignette {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, transparent 58%, rgba(4,8,18,.42) 100%);
}
/* 프레임 자체 글리치 — QR 캔버스는 건드리지 않고 프레임만 미세 튐 */
.airbeam .ab-cast-on.ab-qr-frame { animation: ab-pulse 2.6s ease-in-out infinite, ab-jitter 4.5s steps(1) infinite; }
@keyframes ab-jitter {
  0%, 91%, 100% { transform: translate(0,0); }
  92% { transform: translate(1px,-1px) skewX(.3deg); }
  93% { transform: translate(-1px,1px); }
  94% { transform: translate(0,0); }
  96.5% { transform: translate(-1px,0) skewX(-.3deg); }
  97% { transform: translate(0,0); }
}
/* 송출 중 배경 분위기 전환 */
.airbeam.ab-air { transition: background .5s; }
.airbeam.ab-air-cast {
  background:
    radial-gradient(1200px 600px at 50% -8%, rgba(52,227,255,.05), transparent 60%),
    radial-gradient(900px 500px at 85% 120%, rgba(166,121,255,.05), transparent 60%),
    #04060d;
}

.ab-cast-status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ab-mono); font-size: 12.5px; letter-spacing: .12em;
  color: var(--ab-warn);
  border: 1px solid rgba(255,207,107,.35); border-radius: 99px;
  padding: 7px 14px; margin-bottom: 12px;
  background: rgba(255,207,107,.06);
}
.ab-cast-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #ff5d5d; box-shadow: 0 0 8px #ff5d5d;
  animation: ab-cast-blink 1.1s steps(1) infinite;
}
@keyframes ab-cast-blink { 0%,60% { opacity: 1; } 61%,100% { opacity: .25; } }

.ab-beam-actions { display: flex; gap: 8px; margin-bottom: 10px; }
.ab-beam-actions .ab-btn { margin-top: 0; }

/* 전체화면 송출 (전광판) */
.airbeam.ab-air-full .ab-head,
.airbeam.ab-air-full .ab-tabs,
.airbeam.ab-air-full .ab-foot,
.airbeam.ab-air-full .ab-beam-help,
.airbeam.ab-air-full .ab-fps-row,
.airbeam.ab-air-full .ab-beam-actions,
.airbeam.ab-air-full #ab-beam-again,
.airbeam.ab-air-full .ab-beam-meta { display: none; }
.airbeam.ab-air-full { padding: 0; display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.airbeam.ab-air-full .ab-wrap { max-width: none; width: 100%; display: flex; align-items: center; justify-content: center; }
.airbeam.ab-air-full .ab-panel { background: transparent; border: 0; padding: 0; width: 100%; }
.airbeam.ab-air-full .ab-qr-frame { width: min(78vh, 92vw); margin: 0 auto; }
.airbeam.ab-air-full .ab-cast-status { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 10; display: inline-flex !important; }
.ab-full-exit {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 10;
  font-family: var(--ab-mono); font-size: 12px; color: var(--ab-muted);
  background: rgba(7,10,20,.7); border: 1px solid var(--ab-line); border-radius: 99px;
  padding: 8px 16px; cursor: pointer;
}

.ab-home { color: var(--ab-muted); text-decoration: none; }
.ab-home:hover { color: var(--ab-cyan); }

@media (max-width: 380px) {
  .ab-panel { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .ab-qr-frame, .ab-scan-frame::after { animation: none; }
}