:root {
  color-scheme: dark;
  --bg: #020403;
  --panel: rgba(3, 12, 7, 0.78);
  --panel-strong: rgba(6, 28, 14, 0.92);
  --green: #40ff7a;
  --green-soft: #a0ffba;
  --amber: #d8ff79;
  --red: #7dff9d;
  --text: #d8ffe1;
  --muted: #68c982;
  --line: rgba(85, 255, 139, 0.34);
}

* {
  box-sizing: border-box;
}

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

body {
  overflow-x: hidden;
  background: var(--bg);
  color: var(--green-soft);
  font-family: "Segoe UI", system-ui, sans-serif;
}

button,
input {
  font: inherit;
}

#rainCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  background: #010302;
}

.app {
  position: relative;
  z-index: 1;
  width: min(960px, calc(100vw - 24px));
  min-height: 100svh;
  margin: 0 auto;
}

.screen {
  min-height: 100svh;
  display: none;
}

.screen.is-active {
  display: grid;
}

.title-screen {
  place-items: center;
  align-content: center;
  gap: 34px;
  text-align: center;
}

.title-copy {
  display: grid;
  gap: 10px;
}

.title-tagline {
  max-width: min(640px, 92vw);
  margin: -12px 0 0;
  color: var(--green-soft);
  font-size: clamp(0.95rem, 3.6vw, 1.25rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-align: center;
  text-shadow:
    0 0 8px rgba(64, 255, 122, 0.62),
    0 0 22px rgba(64, 255, 122, 0.34);
}

.eyebrow {
  margin: 0;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(2.6rem, 9vw, 5.6rem);
  line-height: 1;
  color: #e8ffed;
  text-shadow:
    0 0 3px #e8ffed,
    0 0 10px rgba(64, 255, 122, 0.95),
    0 0 24px rgba(64, 255, 122, 0.68),
    0 0 54px rgba(64, 255, 122, 0.42);
}

h2 {
  margin-bottom: 4px;
  color: var(--green-soft);
  font-size: clamp(2.5rem, 9vw, 5rem);
  line-height: 0.95;
}

h3 {
  margin-bottom: 12px;
  color: var(--green-soft);
  font-size: 1rem;
}

button {
  min-height: 44px;
  border: 1px solid rgba(64, 255, 122, 0.58);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--green-soft);
  cursor: pointer;
  font-weight: 800;
}

button:hover:not(:disabled),
button:focus-visible {
  border-color: var(--green);
  box-shadow: 0 0 18px rgba(64, 255, 122, 0.28);
}

.primary-action {
  width: min(280px, 72vw);
  min-height: 56px;
  font-size: 1.08rem;
  text-transform: uppercase;
}

.countdown-screen {
  place-items: center;
  align-content: center;
  gap: 16px;
}

.countdown-number {
  color: var(--green);
  font: 900 clamp(6rem, 32vw, 14rem) / 0.9 Consolas, "Courier New", monospace;
  text-shadow: 0 0 42px rgba(64, 255, 122, 0.72);
}

.game-screen {
  position: relative;
  place-items: center;
  padding: calc(14px + env(safe-area-inset-top)) 0 calc(14px + env(safe-area-inset-bottom));
}

.game-panel {
  width: min(560px, 100%);
  display: grid;
  justify-items: center;
  gap: 10px;
}

.game-hud {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: end;
  width: min(440px, 100%);
  gap: 10px;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  backdrop-filter: none;
}

.ranking,
.result-summary {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 0 24px rgba(64, 255, 122, 0.11);
  backdrop-filter: blur(5px);
}

.meter {
  min-height: 0;
  padding: 0 4px;
  text-align: center;
}

.side-meter {
  padding-bottom: 5px;
}

.meter span {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.52rem;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.meter strong {
  display: block;
  margin-top: 1px;
  color: var(--green-soft);
  font-family: Consolas, "Courier New", monospace;
  font-size: clamp(0.78rem, 2.6vw, 1rem);
  text-shadow: 0 0 10px rgba(64, 255, 122, 0.28);
}

.time-meter strong {
  position: relative;
  min-width: 2ch;
  z-index: 1;
  color: var(--green);
  font-size: 1rem;
  line-height: 1;
  text-shadow:
    0 0 4px rgba(216, 255, 225, 0.82),
    0 0 14px rgba(64, 255, 122, 0.74),
    0 0 32px rgba(64, 255, 122, 0.46);
}

.time-meter {
  position: relative;
}

.time-meter .time-value {
  display: flex;
  min-width: auto;
  gap: clamp(8px, 2vw, 14px);
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.segment-digit {
  position: relative;
  width: clamp(58px, 14vw, 96px);
  height: clamp(96px, 24vw, 158px);
  display: block;
}

.segment-digit.time-tick {
  animation: timeTypeFlash 180ms steps(2, end);
}

.seg {
  position: absolute;
  display: block;
  border-radius: 999px;
  background: var(--green);
  box-shadow:
    0 0 5px rgba(160, 255, 186, 0.74),
    0 0 13px rgba(64, 255, 122, 0.56);
  opacity: 0.13;
}

.seg-a,
.seg-d,
.seg-g {
  left: 18%;
  width: 64%;
  height: 7%;
}

.seg-a {
  top: 3%;
}

.seg-g {
  top: 46.5%;
}

.seg-d {
  bottom: 3%;
}

.seg-b,
.seg-c,
.seg-e,
.seg-f {
  width: 9%;
  height: 38%;
}

.seg-b,
.seg-c {
  right: 5%;
}

.seg-e,
.seg-f {
  left: 5%;
}

.seg-b,
.seg-f {
  top: 9%;
}

.seg-c,
.seg-e {
  bottom: 9%;
}

.segment-digit[data-digit="0"] .seg-a,
.segment-digit[data-digit="0"] .seg-b,
.segment-digit[data-digit="0"] .seg-c,
.segment-digit[data-digit="0"] .seg-d,
.segment-digit[data-digit="0"] .seg-e,
.segment-digit[data-digit="0"] .seg-f,
.segment-digit[data-digit="1"] .seg-b,
.segment-digit[data-digit="1"] .seg-c,
.segment-digit[data-digit="2"] .seg-a,
.segment-digit[data-digit="2"] .seg-b,
.segment-digit[data-digit="2"] .seg-g,
.segment-digit[data-digit="2"] .seg-e,
.segment-digit[data-digit="2"] .seg-d,
.segment-digit[data-digit="3"] .seg-a,
.segment-digit[data-digit="3"] .seg-b,
.segment-digit[data-digit="3"] .seg-c,
.segment-digit[data-digit="3"] .seg-d,
.segment-digit[data-digit="3"] .seg-g,
.segment-digit[data-digit="4"] .seg-f,
.segment-digit[data-digit="4"] .seg-g,
.segment-digit[data-digit="4"] .seg-b,
.segment-digit[data-digit="4"] .seg-c,
.segment-digit[data-digit="5"] .seg-a,
.segment-digit[data-digit="5"] .seg-f,
.segment-digit[data-digit="5"] .seg-g,
.segment-digit[data-digit="5"] .seg-c,
.segment-digit[data-digit="5"] .seg-d,
.segment-digit[data-digit="6"] .seg-a,
.segment-digit[data-digit="6"] .seg-f,
.segment-digit[data-digit="6"] .seg-g,
.segment-digit[data-digit="6"] .seg-c,
.segment-digit[data-digit="6"] .seg-d,
.segment-digit[data-digit="6"] .seg-e,
.segment-digit[data-digit="7"] .seg-a,
.segment-digit[data-digit="7"] .seg-b,
.segment-digit[data-digit="7"] .seg-c,
.segment-digit[data-digit="8"] .seg-a,
.segment-digit[data-digit="8"] .seg-b,
.segment-digit[data-digit="8"] .seg-c,
.segment-digit[data-digit="8"] .seg-d,
.segment-digit[data-digit="8"] .seg-e,
.segment-digit[data-digit="8"] .seg-f,
.segment-digit[data-digit="8"] .seg-g,
.segment-digit[data-digit="9"] .seg-a,
.segment-digit[data-digit="9"] .seg-b,
.segment-digit[data-digit="9"] .seg-c,
.segment-digit[data-digit="9"] .seg-d,
.segment-digit[data-digit="9"] .seg-f,
.segment-digit[data-digit="9"] .seg-g {
  opacity: 1;
}

@keyframes timeTypeFlash {
  0% {
    background: rgba(64, 255, 122, 0.34);
    box-shadow:
      0 0 0 5px rgba(64, 255, 122, 0.18),
      0 0 26px rgba(64, 255, 122, 0.7),
      inset 0 0 12px rgba(216, 255, 225, 0.45);
    color: var(--green-soft);
  }

  100% {
    background: transparent;
    box-shadow: none;
    color: var(--green);
  }
}

.answer-row {
  width: min(560px, 100%);
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  align-items: center;
}

.answer-row label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.answer-slots {
  min-width: 0;
  display: flex;
  justify-content: center;
  gap: 6px;
  outline: none;
}

.answer-slot {
  width: clamp(32px, 8vw, 46px);
  height: clamp(38px, 9vw, 50px);
  display: grid;
  place-items: center;
  border: 1px solid rgba(64, 255, 122, 0.58);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.58);
  color: var(--green-soft);
  box-shadow: inset 0 0 14px rgba(64, 255, 122, 0.08);
  font: 900 clamp(1.1rem, 4.8vw, 1.65rem) / 1 "Yu Gothic", "Meiryo", sans-serif;
}

.answer-row:focus-within .answer-slot,
.answer-slots:focus .answer-slot {
  border-color: var(--green);
  box-shadow: 0 0 14px rgba(64, 255, 122, 0.2), inset 0 0 14px rgba(64, 255, 122, 0.08);
}

.answer-input {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  opacity: 0.02;
  outline: none;
  padding: 0;
  z-index: 2;
}

.answer-submit {
  width: 56px;
  min-width: 56px;
  height: 48px;
  padding: 0;
  color: var(--green);
  font: 900 1.9rem / 1 Consolas, "Courier New", monospace;
  text-shadow: 0 0 12px rgba(64, 255, 122, 0.54);
}

.message {
  width: min(520px, 100%);
  min-height: 22px;
  margin: 0;
  color: var(--green-soft);
  font-size: 0.88rem;
  text-align: center;
}

.score-line {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
  text-transform: uppercase;
}

.score-line strong {
  color: var(--green-soft);
  font-family: Consolas, "Courier New", monospace;
  font-size: 1rem;
}

.message.bad,
.final-feedback.bad {
  color: var(--red);
}

.message.warn,
.final-feedback.warn {
  color: var(--amber);
}

.result-screen {
  align-content: center;
  gap: 12px;
  padding: 16px 0 calc(16px + env(safe-area-inset-bottom));
}

.result-summary,
.ranking {
  padding: 16px;
}

.result-summary {
  text-align: center;
}

.result-summary p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.final-feedback {
  min-height: 24px;
  margin: 10px 0 0;
  color: var(--green-soft);
  font-size: 0.95rem;
}

.ranking ol {
  margin: 0;
  padding-left: 22px;
}

.ranking li {
  margin-bottom: 8px;
  color: var(--muted);
}

.ranking strong {
  color: var(--green-soft);
}

.result-actions {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 8px;
}

@media (max-width: 620px) {
  .app {
    width: min(100% - 16px, 480px);
  }

  .title-screen {
    gap: 28px;
  }

  h1 {
    font-size: clamp(2.45rem, 14vw, 4.2rem);
  }

  .game-hud {
    width: min(100%, 360px);
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 6px;
  }

  .meter {
    padding: 0 2px;
  }

  .meter span {
    font-size: 0.46rem;
  }

  .meter strong {
    margin-top: 1px;
    font-size: clamp(0.66rem, 3.6vw, 0.9rem);
  }

  .time-meter strong {
    font-size: 1rem;
  }

  .segment-digit {
    width: clamp(54px, 18vw, 78px);
    height: clamp(90px, 29vw, 128px);
  }

  .answer-row {
    width: min(100%, 420px);
    grid-template-columns: minmax(0, 1fr);
  }

  .answer-input {
    width: 100%;
    height: 42px;
  }

  .answer-slots {
    gap: 4px;
  }

  button {
    height: 42px;
    min-height: 42px;
  }

  .answer-submit {
    width: 54px;
    min-width: 54px;
    font-size: 1.7rem;
  }

  .result-actions {
    grid-template-columns: 1fr;
  }
}