/* ================================================================
   Prompt Injection Battle — HUD / tech-arena theme (v3)
   ================================================================ */
:root {
  --bg: #04060c;
  --bg-2: #090d18;
  --card: #0d1424;
  --card-2: #111a30;
  --card-3: #16223c;
  --ink: #e8edf7;
  --muted: #7c89a3;
  --line: #1e2b47;
  --line-2: #2a3d63;
  --spear: #ff3b5c;
  --spear-glow: rgba(255, 59, 92, .45);
  --shield: #38bdf8;
  --shield-glow: rgba(56, 189, 248, .45);
  --gold: #ffd166;
  --gold-glow: rgba(255, 209, 102, .4);
  --cyan: #22d3ee;
  --ok: #34d399;
  --radius: 12px;
  --mono: "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang HK", "Noto Sans TC", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.5;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* ---------- background: grid + scanlines + glow ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 420px at 18% -8%, rgba(56, 189, 248, .08), transparent 62%),
    radial-gradient(900px 420px at 82% -8%, rgba(255, 59, 92, .08), transparent 62%),
    linear-gradient(rgba(148, 163, 216, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 216, .045) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
}
.bg-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, .014) 0 1px,
    transparent 1px 4px
  );
}

/* ---------- header ---------- */
.topbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 20px 8px;
  max-width: 780px;
  margin: 0 auto;
}
.logo {
  font-size: 28px;
  filter: drop-shadow(0 0 10px var(--gold-glow));
}
.title-block h1 {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: .1em;
  font-weight: 800;
  text-shadow: 0 0 18px rgba(56, 189, 248, .35);
}
.subtitle { color: var(--muted); font-size: 12px; letter-spacing: .18em; font-family: var(--mono); }
.subtitle .vs { color: var(--gold); font-weight: 700; }

.status {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--ok);
  border: 1px solid rgba(52, 211, 153, .35);
  background: rgba(52, 211, 153, .07);
  padding: 5px 10px;
  border-radius: 999px;
  white-space: nowrap;
  animation: blink 3.2s ease infinite;
}

/* ---------- layout ---------- */
.container {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 14px 16px 40px;
  display: grid;
  gap: 16px;
}

.card {
  position: relative;
  background: linear-gradient(180deg, var(--card), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow:
    0 12px 40px rgba(0, 0, 0, .5),
    inset 0 1px 0 rgba(255, 255, 255, .03);
}

/* corner brackets — HUD frame */
.card-corner { position: absolute; width: 14px; height: 14px; pointer-events: none; opacity: .85; }
.card-corner.tl { top: -1px; left: -1px; border-top: 2px solid var(--cyan); border-left: 2px solid var(--cyan); border-top-left-radius: 12px; }
.card-corner.tr { top: -1px; right: -1px; border-top: 2px solid var(--cyan); border-right: 2px solid var(--cyan); border-top-right-radius: 12px; }

.card-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 700;
}
.card-title .tick { color: var(--cyan); margin-right: 4px; }

/* ---------- setup ---------- */
.fighters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.fighter {
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  position: relative;
  overflow: hidden;
}
.fighter::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--shield), transparent);
  opacity: .5;
}
.fighter:has(.spear-head)::before {
  background: linear-gradient(90deg, transparent, var(--spear), transparent);
}
.fighter-head {
  width: 46px; height: 46px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 22px;
  margin-bottom: 8px;
}
.shield-head {
  background: rgba(56, 189, 248, .12);
  border: 1px solid rgba(56, 189, 248, .4);
  box-shadow: 0 0 14px var(--shield-glow);
}
.spear-head {
  background: rgba(255, 59, 92, .12);
  border: 1px solid rgba(255, 59, 92, .4);
  box-shadow: 0 0 14px var(--spear-glow);
}

.fighter label {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.role-tag {
  font-size: 10px;
  color: var(--gold);
  border: 1px solid rgba(255, 209, 102, .35);
  border-radius: 999px;
  padding: 1px 8px;
  margin-left: 6px;
  font-weight: 600;
  font-family: var(--sans);
}
.fighter select {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--line-2);
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  appearance: none;
  min-height: 44px;
}
.role-blurb {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 8px;
  min-height: 32px;
}

/* ---------- stat bars (spec card) ---------- */
.stats { margin-top: 8px; display: grid; gap: 4px; }
.stat-row { display: flex; align-items: center; gap: 8px; }
.stat-label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .1em;
  color: var(--muted);
  width: 30px;
  flex: none;
}
.stat-track {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .06);
  overflow: hidden;
}
.stat-fill {
  height: 100%;
  border-radius: 3px;
  transition: width .4s ease;
}
.stat-fill.def { background: linear-gradient(90deg, #0e7ab8, var(--shield)); box-shadow: 0 0 8px var(--shield-glow); }
.stat-fill.atk { background: linear-gradient(90deg, #a31630, var(--spear)); box-shadow: 0 0 8px var(--spear-glow); }
.stat-val {
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--muted);
  width: 26px;
  text-align: right;
  flex: none;
}

/* ---------- password field ---------- */
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.pw-row { display: flex; gap: 0; align-items: stretch; }
.pw-prefix {
  display: grid; place-items: center;
  padding: 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cyan);
  background: var(--card-3);
  border: 1px solid var(--line-2);
  border-right: none;
  border-radius: 8px 0 0 8px;
}
.pw-row input {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--line-2);
  border-left: none;
  background: var(--bg);
  color: var(--gold);
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .08em;
  min-height: 44px;
  outline: none;
}
.pw-row input:focus { box-shadow: 0 0 0 1px var(--cyan); }
.btn-ghost {
  width: 46px;
  border: 1px solid var(--line-2);
  border-left: none;
  border-radius: 0 8px 8px 0;
  background: var(--card-3);
  font-size: 17px;
  cursor: pointer;
  transition: filter .12s ease;
}
.btn-ghost:hover { filter: brightness(1.2); }
.hint { font-size: 11.5px; color: var(--muted); margin-top: 8px; }
.hint b { color: var(--ink); }

/* ---------- primary button ---------- */
.btn-start {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .06em;
  color: #04060c;
  background: linear-gradient(90deg, var(--spear), var(--gold));
  cursor: pointer;
  min-height: 52px;
  transition: transform .12s ease, filter .12s ease;
  box-shadow: 0 6px 24px rgba(255, 59, 92, .25);
  position: relative;
  overflow: hidden;
}
.btn-start::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 30%, rgba(255, 255, 255, .35) 50%, transparent 70%);
  transform: translateX(-120%);
  animation: sheen 4s ease infinite;
}
.btn-mon {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  margin-right: 8px;
  opacity: .85;
}
.btn-start:hover { filter: brightness(1.1); }
.btn-start:active { transform: scale(.98); }
.btn-start:disabled { opacity: .5; cursor: wait; }

/* ---------- battle ---------- */
.phase-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}
.phase-tab {
  text-align: center;
  padding: 10px;
  border-radius: 8px;
  background: var(--card-2);
  border: 1px solid var(--line);
  color: var(--muted);
  font-weight: 700;
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: .1em;
  position: relative;
}
.phase-tab small { font-weight: 400; color: var(--muted); font-family: var(--sans); letter-spacing: 0; }
.phase-tab.active {
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 0 14px var(--gold-glow);
  text-shadow: 0 0 8px var(--gold-glow);
}

.phase-banner {
  font-size: 14px;
  font-weight: 800;
  text-align: center;
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 10px;
  letter-spacing: .04em;
  position: relative;
  overflow: hidden;
}
.phase-banner.p1 {
  background: rgba(255, 59, 92, .1);
  color: var(--spear);
  border: 1px solid rgba(255, 59, 92, .35);
  text-shadow: 0 0 10px var(--spear-glow);
}
.phase-banner.p2 {
  background: rgba(56, 189, 248, .1);
  color: var(--shield);
  border: 1px solid rgba(56, 189, 248, .35);
  text-shadow: 0 0 10px var(--shield-glow);
}

.secret-line {
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 12px;
  word-break: break-all;
}
.secret-line b { color: var(--gold); text-shadow: 0 0 8px var(--gold-glow); }

.log { display: grid; gap: 10px; }

.turn {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--card-2);
  animation: fadeUp .35s ease both;
  position: relative;
}
.turn-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--cyan);
  margin-bottom: 6px;
}
.msg {
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 6px;
  margin-bottom: 6px;
  font-family: var(--mono);
}
.msg:last-child { margin-bottom: 0; }
.msg .who { font-weight: 800; margin-right: 8px; font-size: 10px; letter-spacing: .1em; }
.msg.attack {
  background: rgba(255, 59, 92, .08);
  border-left: 2px solid var(--spear);
}
.msg.attack .who { color: var(--spear); }
.msg.defend {
  background: rgba(56, 189, 248, .08);
  border-left: 2px solid var(--shield);
}
.msg.defend .who { color: var(--shield); }
.msg .text { word-break: break-word; }

.leak-flag {
  display: inline-block;
  margin-top: 6px;
  font-size: 11px;
  font-weight: 800;
  color: #04060c;
  background: var(--spear);
  border-radius: 4px;
  padding: 3px 10px;
  font-family: var(--mono);
  letter-spacing: .08em;
  animation: pulse 1s ease infinite;
  box-shadow: 0 0 14px var(--spear-glow);
}

.phase-result {
  margin-top: 14px;
  padding: 12px;
  border-radius: 8px;
  text-align: center;
  font-weight: 800;
  font-size: 14px;
  font-family: var(--mono);
  letter-spacing: .04em;
}
.phase-result.win {
  background: rgba(255, 59, 92, .12);
  color: var(--spear);
  border: 1px solid rgba(255, 59, 92, .4);
  box-shadow: 0 0 18px rgba(255, 59, 92, .15);
}
.phase-result.survive {
  background: rgba(52, 211, 153, .1);
  color: var(--ok);
  border: 1px solid rgba(52, 211, 153, .35);
  box-shadow: 0 0 18px rgba(52, 211, 153, .12);
}

/* ---------- result ---------- */
.scoreboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.score-col {
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.score-col .name { font-weight: 800; font-size: 14px; }
.score-col .role { font-size: 11px; color: var(--muted); margin-bottom: 8px; font-family: var(--mono); }
.score-col .total {
  font-family: var(--mono);
  font-size: 40px;
  font-weight: 900;
  line-height: 1;
}
.score-col.a .total { color: var(--shield); text-shadow: 0 0 18px var(--shield-glow); }
.score-col.b .total { color: var(--spear); text-shadow: 0 0 18px var(--spear-glow); }
.score-col .detail { font-size: 10.5px; color: var(--muted); margin-top: 8px; font-family: var(--mono); }
.score-col.win-col {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold), 0 0 22px rgba(255, 209, 102, .15);
}
.score-col.win-col .name { color: var(--gold); }

.winner-banner {
  text-align: center;
  font-size: 18px;
  font-weight: 900;
  padding: 16px;
  border-radius: 10px;
  letter-spacing: .06em;
  margin-bottom: 14px;
  font-family: var(--mono);
  position: relative;
  overflow: hidden;
}
.winner-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255,255,255,.05) 0 1px, transparent 1px 3px);
  pointer-events: none;
}
.winner-banner.draw {
  background: rgba(255, 209, 102, .1);
  color: var(--gold);
  border: 1px solid rgba(255, 209, 102, .4);
  text-shadow: 0 0 12px var(--gold-glow);
}
.winner-banner.model-a {
  background: rgba(56, 189, 248, .12);
  color: var(--shield);
  border: 1px solid rgba(56, 189, 248, .45);
  text-shadow: 0 0 12px var(--shield-glow);
  box-shadow: 0 0 24px rgba(56, 189, 248, .12);
}
.winner-banner.model-b {
  background: rgba(255, 59, 92, .12);
  color: var(--spear);
  border: 1px solid rgba(255, 59, 92, .45);
  text-shadow: 0 0 12px var(--spear-glow);
  box-shadow: 0 0 24px rgba(255, 59, 92, .12);
}

/* ---------- footer ---------- */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  padding: 10px 16px 30px;
  font-family: var(--mono);
  letter-spacing: .06em;
}
.version-tag { color: var(--cyan); }

/* ---------- motion ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  96% { opacity: .4; }
}
@keyframes sheen {
  0% { transform: translateX(-120%); }
  55% { transform: translateX(120%); }
  100% { transform: translateX(120%); }
}

@media (prefers-reduced-motion: reduce) {
  .turn { animation: none; }
  .leak-flag, .status, .btn-start::after { animation: none; }
}

@media (max-width: 480px) {
  .fighters { grid-template-columns: 1fr; }
  .container { padding: 10px 12px 30px; }
  .status { display: none; }
}