:root {
  --bg: #05030d;
  --cyan: #3ff0ff;
  --mag: #ff3fd2;
  --amber: #ffb13f;
  --green: #4dff9a;
  --ink: #e8f6ff;
  --dim: #7f8ba8;
  --font: 'Orbitron', 'Segoe UI', system-ui, sans-serif;
  --font-jp: system-ui, 'Hiragino Sans', 'Yu Gothic UI', 'Meiryo', 'Noto Sans JP', sans-serif;
  --cut: 14px;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#game {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

#ui { position: fixed; inset: 0; pointer-events: none; }

.hidden { display: none !important; }

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 24px 16px;
  pointer-events: auto;
  overflow-y: auto;
}

.modal {
  background: rgba(5, 3, 13, 0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: fade-in 0.2s ease-out;
}

@keyframes fade-in { from { opacity: 0; } }

/* ---------------------------------------------------------------- home */
.emblem svg {
  width: 96px;
  height: 48px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2.5;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 6px var(--cyan)) drop-shadow(0 0 16px var(--mag));
  animation: hover 3s ease-in-out infinite;
}
.emblem svg path:last-child { stroke: var(--mag); }

@keyframes hover { 50% { transform: translateY(-6px); } }

.logo {
  font-weight: 900;
  font-size: clamp(44px, 13vw, 128px);
  letter-spacing: 0.14em;
  margin-right: -0.14em;
  line-height: 1;
  color: #fff;
  text-shadow:
    0 0 4px #fff,
    0 0 12px var(--cyan),
    0 0 28px var(--cyan),
    0 0 60px var(--mag);
  animation: flicker 6s infinite;
}

@keyframes flicker {
  0%, 92%, 96%, 100% { opacity: 1; }
  94% { opacity: 0.55; }
}

.tagline {
  font-size: clamp(10px, 2.4vw, 14px);
  font-weight: 500;
  letter-spacing: 0.5em;
  margin-right: -0.5em;
  color: var(--mag);
  text-shadow: 0 0 10px var(--mag);
  margin-bottom: 16px;
}

.menu { display: flex; flex-direction: column; gap: 14px; align-items: center; }

.hint {
  font-family: var(--font-jp);
  font-size: 12px;
  color: var(--dim);
  letter-spacing: 0.08em;
  text-align: center;
  margin-top: 12px;
}

/* -------------------------------------------------------------- button */
.btn {
  font: inherit;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.24em;
  color: var(--cyan);
  background: rgba(63, 240, 255, 0.05);
  border: 1.5px solid var(--cyan);
  padding: 15px 36px;
  min-width: min(280px, 80vw);
  cursor: pointer;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  text-shadow: 0 0 8px currentColor;
  box-shadow: inset 0 0 18px rgba(63, 240, 255, 0.12);
  transition: background 0.15s, color 0.15s, transform 0.1s;
}
.btn:hover, .btn:focus-visible {
  background: rgba(63, 240, 255, 0.2);
  color: #fff;
  outline: none;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  color: #fff;
  background: linear-gradient(90deg, rgba(63, 240, 255, 0.25), rgba(255, 63, 210, 0.25));
  border-color: var(--mag);
  font-size: 16px;
  padding: 18px 40px;
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: linear-gradient(90deg, rgba(63, 240, 255, 0.45), rgba(255, 63, 210, 0.45));
}

.btn-small { min-width: 160px; padding: 12px 24px; font-size: 12px; }

.btn-pause {
  position: absolute;
  top: calc(14px + env(safe-area-inset-top));
  right: calc(14px + env(safe-area-inset-right));
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  pointer-events: auto;
  cursor: pointer;
  background: rgba(5, 3, 13, 0.5);
  border: 1.5px solid var(--cyan);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn-pause svg { width: 20px; height: 20px; stroke: var(--cyan); stroke-width: 3; stroke-linecap: round; }

/* ------------------------------------------------------------- headings */
.heading {
  font-weight: 900;
  font-size: clamp(22px, 5vw, 34px);
  letter-spacing: 0.3em;
  margin-right: -0.3em;
  color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan);
}
.heading-glow {
  color: #fff;
  text-shadow: 0 0 6px #fff, 0 0 18px var(--cyan), 0 0 40px var(--mag);
}

/* ---------------------------------------------------------- stage select */
.stage-list { display: flex; flex-direction: column; gap: 16px; width: min(560px, 100%); }

.stage-card {
  --c: var(--cyan);
  --a: var(--mag);
  position: relative;
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  padding: 22px 24px;
  font: inherit;
  text-align: left;
  color: var(--ink);
  cursor: pointer;
  background: linear-gradient(110deg, color-mix(in srgb, var(--c) 16%, transparent), rgba(5, 3, 13, 0.8) 70%);
  border: 1.5px solid var(--c);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
  transition: transform 0.15s, background 0.15s;
}
.stage-card:hover, .stage-card:focus-visible {
  outline: none;
  transform: translateX(4px);
  background: linear-gradient(110deg, color-mix(in srgb, var(--c) 30%, transparent), rgba(5, 3, 13, 0.8) 70%);
}

.planet {
  position: relative;
  flex: none;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background:
    repeating-linear-gradient(-20deg, transparent 0 9px, color-mix(in srgb, var(--c) 30%, transparent) 9px 11px),
    radial-gradient(circle at 32% 30%, #fff 0, var(--c) 18%, #12304a 62%, #05030d 100%);
  box-shadow: 0 0 24px color-mix(in srgb, var(--c) 60%, transparent), inset -10px -12px 24px rgba(0, 0, 0, 0.6);
}
.planet-ring {
  position: absolute;
  left: -22px;
  right: -22px;
  top: 34px;
  height: 18px;
  border: 2px solid var(--a);
  border-radius: 50%;
  transform: rotate(-16deg);
  box-shadow: 0 0 10px var(--a);
  animation: spin-ring 8s linear infinite;
}
@keyframes spin-ring { 50% { transform: rotate(-10deg) scaleX(1.06); } }

.stage-info { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.stage-no { font-size: 11px; letter-spacing: 0.3em; color: var(--a); }
.stage-name {
  font-size: clamp(24px, 6vw, 32px);
  font-weight: 900;
  letter-spacing: 0.12em;
  color: #fff;
  text-shadow: 0 0 12px var(--c);
}
.stage-sub { font-size: 11px; letter-spacing: 0.2em; color: var(--c); }
.stage-rec { font-size: 10px; letter-spacing: 0.1em; color: var(--dim); margin-top: 6px; }

.badge {
  position: absolute;
  top: 12px;
  right: 18px;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--bg);
  background: var(--green);
  padding: 3px 8px;
  box-shadow: 0 0 12px var(--green);
}

/* -------------------------------------------------------------- level up */
.levelup-head { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.levelup-level { font-size: 13px; letter-spacing: 0.3em; color: var(--mag); text-shadow: 0 0 8px var(--mag); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 250px));
  gap: 18px;
  width: min(810px, 100%);
  justify-content: center;
}

.card {
  --c: var(--cyan);
  --n: var(--cyan);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  min-height: 250px;
  padding: 20px 18px 18px;
  font: inherit;
  text-align: left;
  color: var(--ink);
  cursor: pointer;
  background: linear-gradient(165deg, color-mix(in srgb, var(--c) 18%, transparent), rgba(5, 3, 13, 0.9) 55%);
  border: 1.5px solid var(--c);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  transition: transform 0.15s, background 0.15s, opacity 0.2s;
  animation: card-in 0.3s backwards;
}
.card:nth-child(2) { animation-delay: 0.06s; }
.card:nth-child(3) { animation-delay: 0.12s; }
@keyframes card-in { from { opacity: 0; transform: translateY(16px); } }

.card:hover, .card.focus {
  transform: translateY(-4px);
  background: linear-gradient(165deg, color-mix(in srgb, var(--c) 34%, transparent), rgba(5, 3, 13, 0.9) 60%);
  outline: none;
}
.card.focus::after {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px dashed color-mix(in srgb, var(--c) 70%, transparent);
  clip-path: inherit;
  pointer-events: none;
}
.cards.arming .card { pointer-events: none; }

.card-head { display: flex; align-items: center; gap: 8px; width: 100%; }
.card-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--c);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 4px var(--c));
}
.card-cat { font-size: 11px; font-weight: 700; letter-spacing: 0.3em; color: var(--c); }
.card-key {
  margin-left: auto;
  font-size: 10px;
  color: var(--dim);
  border: 1px solid var(--dim);
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
}
.card-name {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: #fff;
  text-shadow: 0 0 10px var(--n);
  margin-top: 6px;
}
.card-lv { font-size: 12px; font-weight: 700; letter-spacing: 0.15em; color: var(--n); }
.card-lv.is-new {
  color: var(--bg);
  background: var(--c);
  padding: 2px 8px;
  box-shadow: 0 0 10px var(--c);
}
.card-desc { font-family: var(--font-jp); font-size: 13px; line-height: 1.7; color: #c9d6ee; }
.card-info {
  font-family: var(--font-jp);
  font-size: 12px;
  color: var(--c);
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid color-mix(in srgb, var(--c) 35%, transparent);
  width: 100%;
}

@media (max-width: 760px) {
  .cards { grid-template-columns: minmax(0, 440px); gap: 10px; }
  .card { min-height: 0; padding: 14px 16px; gap: 6px; }
  .card-name { font-size: 18px; margin-top: 2px; }
  .card-desc { font-size: 12px; line-height: 1.6; }
}

/* --------------------------------------------------------------- result */
.result-stage { font-size: 12px; letter-spacing: 0.4em; color: var(--dim); }
.result-title {
  font-size: clamp(34px, 9vw, 72px);
  font-weight: 900;
  letter-spacing: 0.14em;
  margin-right: -0.14em;
  text-align: center;
  color: #fff;
  text-shadow: 0 0 6px #fff, 0 0 20px #ff3f5a, 0 0 50px #ff3f5a;
}
.result-title.is-clear { text-shadow: 0 0 6px #fff, 0 0 20px var(--green), 0 0 50px var(--cyan); }

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 14px 36px;
  margin: 8px 0 12px;
  text-align: center;
}
.result-stats div:last-child { grid-column: 1 / -1; }
.result-stats dt { font-size: 10px; letter-spacing: 0.3em; color: var(--dim); }
.result-stats dd { font-size: 20px; font-weight: 700; color: #fff; margin-top: 4px; }
.result-stats div:last-child dd { font-size: 12px; color: var(--cyan); letter-spacing: 0.1em; }

/* --------------------------------------------------------------- banner */
.banner {
  position: absolute;
  left: 0;
  right: 0;
  top: 30%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  --bc: var(--amber);
}
.banner.final { --bc: var(--mag); }
.banner.play { animation: banner 2.8s ease-in-out forwards; }
.b-stripe {
  width: 100%;
  height: 10px;
  background: repeating-linear-gradient(-45deg, var(--bc) 0 12px, transparent 12px 24px);
  opacity: 0.7;
  animation: stripe 0.6s linear infinite;
}
@keyframes stripe { to { background-position: 34px 0; } }
.b-main {
  font-size: clamp(36px, 10vw, 84px);
  font-weight: 900;
  letter-spacing: 0.3em;
  margin-right: -0.3em;
  color: #fff;
  text-shadow: 0 0 10px var(--bc), 0 0 30px var(--bc);
  animation: blink 0.4s steps(2) 5;
}
.b-sub { font-size: clamp(12px, 3vw, 18px); letter-spacing: 0.4em; color: var(--bc); text-shadow: 0 0 8px var(--bc); }
@keyframes blink { 50% { opacity: 0.2; } }
@keyframes banner {
  0% { opacity: 0; transform: scaleY(0.2); }
  8%, 85% { opacity: 1; transform: none; }
  100% { opacity: 0; }
}

/* ---------------------------------------------------------------- misc */
.test-output:empty { display: none; }
.test-output {
  position: fixed;
  inset: 0;
  overflow: auto;
  padding: 16px;
  font: 12px/1.5 monospace;
  color: var(--green);
  background: var(--bg);
  white-space: pre-wrap;
  user-select: text;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}