:root {
  color-scheme: light;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  --ink: #26333a;
  --ink-soft: #65747a;
  --paper: #fffdf8;
  --cream: #f7eee3;
  --navy: #273d54;
  --navy-deep: #182a3c;
  --coral: #ef795f;
  --coral-deep: #d75a46;
  --sun: #ffd487;
  --shadow: 0 24px 70px rgba(32, 51, 57, 0.2);
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  color: var(--ink);
  background: #d8e6dd;
}

button,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.app {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  isolation: isolate;
}

.screen {
  position: absolute;
  inset: 0;
  display: grid;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transform: scale(1.015);
  transition:
    opacity 500ms ease,
    transform 700ms cubic-bezier(0.2, 0.8, 0.2, 1),
    visibility 0s linear 700ms;
}

.screen.is-active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
  transition-delay: 0s;
}

.title-screen {
  place-items: center;
  overflow: hidden;
  background: #fff;
}

.title-screen::after {
  display: none;
}

.title-sky {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.title-sun {
  position: absolute;
  top: 8%;
  right: 10%;
  width: clamp(90px, 15vw, 210px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(255, 214, 138, 0.82);
  box-shadow: 0 0 90px rgba(255, 199, 91, 0.5);
}

.title-cloud {
  position: absolute;
  width: 250px;
  height: 44px;
  border-radius: 100%;
  opacity: 0.62;
  background: rgba(255, 255, 255, 0.82);
  filter: blur(1px);
  animation: cloud-drift 18s ease-in-out infinite alternate;
}

.title-cloud::before,
.title-cloud::after {
  position: absolute;
  content: "";
  border-radius: 50%;
  background: inherit;
}

.title-cloud::before {
  left: 46px;
  bottom: 8px;
  width: 86px;
  height: 72px;
}

.title-cloud::after {
  right: 44px;
  bottom: 5px;
  width: 105px;
  height: 86px;
}

.title-cloud-one {
  top: 20%;
  left: -3%;
}

.title-cloud-two {
  top: 8%;
  left: 36%;
  transform: scale(0.64);
  animation-delay: -6s;
}

.title-mountain {
  position: absolute;
  right: -8%;
  bottom: -23%;
  width: 76%;
  height: 70%;
  transform: rotate(7deg);
  border-radius: 50% 50% 0 0;
  background: #6f9985;
  clip-path: polygon(0 74%, 18% 48%, 29% 62%, 48% 22%, 67% 56%, 81% 38%, 100% 69%, 100% 100%, 0 100%);
}

.title-mountain-back {
  right: 24%;
  bottom: -11%;
  width: 88%;
  opacity: 0.55;
  background: #8fb19c;
}

.title-mountain-front {
  filter: drop-shadow(0 -12px 20px rgba(59, 95, 78, 0.12));
}

.title-road {
  position: absolute;
  right: 10%;
  bottom: -20%;
  width: 15%;
  height: 83%;
  transform: perspective(500px) rotate(16deg) rotateX(56deg);
  border-radius: 50% 50% 0 0;
  opacity: 0.72;
  background: linear-gradient(90deg, #c3b6a1, #e3d5bd 50%, #bdad96);
}

.title-content {
  width: min(90vw, 980px);
  padding: clamp(30px, 6vw, 80px);
  text-align: center;
}

.title-kicker,
.ending-kicker {
  margin: 0 0 18px;
  color: var(--coral-deep);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: clamp(0.66rem, 1.3vw, 0.82rem);
  font-weight: 800;
  letter-spacing: 0.28em;
}

.game-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  color: var(--navy-deep);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2.8rem, 7vw, 6.6rem);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: -0.075em;
  text-shadow: none;
}

.game-title span:nth-child(2) {
  margin-left: 0;
}

.game-title .title-question {
  margin-top: 0.25em;
  margin-left: 0;
  color: var(--coral-deep);
  font-size: 0.7em;
  letter-spacing: -0.06em;
}

.title-copy {
  margin: clamp(24px, 4vw, 44px) 0 28px 0.2em;
  color: #53676e;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  letter-spacing: 0.16em;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  min-width: 190px;
  padding: 15px 24px;
  border: 0;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.12em;
  background: var(--navy);
  box-shadow: 0 12px 24px rgba(37, 60, 81, 0.22);
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.primary-button:hover {
  transform: translateY(-2px);
  background: #31506c;
  box-shadow: 0 16px 30px rgba(37, 60, 81, 0.28);
}

.primary-button:active {
  transform: translateY(1px);
}

.primary-button.title-button {
  min-width: 0;
  margin-top: clamp(44px, 8vw, 76px);
  padding: 9px 2px;
  border-bottom: 1px solid rgba(39, 61, 84, 0.38);
  border-radius: 0;
  color: var(--navy);
  background: transparent;
  box-shadow: none;
}

.primary-button.title-button:hover {
  color: var(--coral-deep);
  background: transparent;
  box-shadow: none;
}

.title-credit {
  position: absolute;
  right: 28px;
  bottom: 22px;
  margin: 0;
  color: rgba(34, 54, 65, 0.56);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  writing-mode: vertical-rl;
}

.game-screen {
  grid-template-rows: auto 1fr;
  padding: clamp(12px, 2vw, 26px);
  background:
    radial-gradient(circle at 14% 15%, rgba(255, 255, 255, 0.9), transparent 26%),
    linear-gradient(135deg, #dce9df 0%, #f5ead9 100%);
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 0 2px clamp(10px, 1.6vw, 18px);
}

.mini-title,
.turn-counter {
  margin: 0;
}

.mini-title {
  color: var(--navy-deep);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(0.76rem, 1.4vw, 0.98rem);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.turn-counter {
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.game-stage {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.1fr);
  width: min(100%, 1120px);
  min-height: 0;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 28px;
  background: rgba(255, 253, 248, 0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.scene-frame {
  position: relative;
  min-width: 0;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  background: #bbc9c0;
}

.scene-backdrop {
  position: absolute;
  inset: -28px;
  opacity: 0.38;
  background-image: var(--scene-image, url("./assets/heroine-01.jpg"));
  background-position: center;
  background-size: cover;
  filter: blur(24px) saturate(0.8);
  transform: scale(1.12);
  transition: opacity 180ms ease;
}

.heroine-image {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: saturate(0.92) contrast(1.015);
  transition:
    opacity 180ms ease,
    transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1),
    filter 420ms ease;
}

.scene-wash {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 72%, rgba(21, 37, 49, 0.18));
}

.scene-frame.is-changing .heroine-image,
.scene-frame.is-changing .scene-backdrop {
  opacity: 0;
}

.scene-frame.is-changing .heroine-image {
  transform: scale(1.025);
  filter: saturate(0.72) blur(2px);
}

.conversation {
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: clamp(24px, 4vw, 54px);
  background:
    linear-gradient(rgba(255, 253, 248, 0.92), rgba(255, 253, 248, 0.92)),
    repeating-linear-gradient(0deg, transparent 0 25px, rgba(62, 93, 105, 0.06) 25px 26px);
}

.speaker-label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.player-echo {
  align-self: flex-end;
  max-width: 84%;
  margin-bottom: clamp(18px, 3vw, 34px);
  padding: 13px 18px;
  border-radius: 18px 18px 4px 18px;
  color: #fff;
  background: var(--navy);
  box-shadow: 0 10px 24px rgba(39, 61, 84, 0.16);
  animation: bubble-in 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.player-echo .speaker-label {
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.62);
}

.player-echo p {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: clamp(0.9rem, 1.7vw, 1.05rem);
  line-height: 1.6;
}

.dialogue-card {
  position: relative;
  margin-top: auto;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid rgba(60, 82, 91, 0.1);
  border-radius: 4px 24px 24px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 45px rgba(51, 69, 76, 0.11);
}

.heroine-label {
  color: var(--coral-deep);
}

.heroine-line {
  min-height: 1.6em;
  margin: 0;
  color: var(--ink);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.dialogue-caret {
  position: absolute;
  right: 22px;
  bottom: 18px;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  border-right: 2px solid rgba(239, 121, 95, 0.65);
  border-bottom: 2px solid rgba(239, 121, 95, 0.65);
  animation: caret 1.4s ease-in-out infinite;
}

.dialogue-card.is-speaking {
  animation: dialogue-in 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.choice-panel {
  margin-top: 20px;
  animation: choice-in 440ms 120ms both cubic-bezier(0.2, 0.8, 0.2, 1);
}

.choice-prompt {
  margin: 0 0 10px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.choice-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.choice-button {
  padding: 14px 18px;
  border: 1px solid rgba(39, 61, 84, 0.18);
  border-radius: 15px;
  color: var(--navy-deep);
  font-weight: 800;
  letter-spacing: 0.14em;
  background: #fff;
  cursor: pointer;
  transition:
    transform 160ms ease,
    color 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease;
}

.choice-button:hover {
  transform: translateY(-2px);
}

.choice-yes:hover,
.choice-yes:focus-visible {
  border-color: var(--coral);
  color: #fff;
  background: var(--coral);
}

.choice-no:hover,
.choice-no:focus-visible {
  border-color: var(--navy);
  color: #fff;
  background: var(--navy);
}

.speech-form {
  margin-top: 22px;
}

.input-label {
  display: block;
  margin: 0 0 8px 2px;
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.input-row input {
  width: 100%;
  min-width: 0;
  padding: 15px 17px;
  border: 1px solid rgba(39, 61, 84, 0.16);
  border-radius: 15px;
  outline: none;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.input-row input::placeholder {
  color: #a2aaa9;
}

.input-row input:focus {
  border-color: rgba(239, 121, 95, 0.7);
  box-shadow: 0 0 0 4px rgba(239, 121, 95, 0.11);
}

.speech-form.has-error .input-row input {
  border-color: var(--coral);
  animation: input-shake 260ms ease;
}

.send-button {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 18px;
  border: 0;
  border-radius: 15px;
  color: #fff;
  font-size: 0.86rem;
  font-weight: 800;
  background: var(--navy);
  box-shadow: 0 8px 16px rgba(39, 61, 84, 0.16);
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 160ms ease;
}

.send-button:hover {
  transform: translateY(-1px);
  background: #31506c;
}

.send-button:disabled,
.input-row input:disabled {
  cursor: wait;
  opacity: 0.62;
}

.input-hint {
  margin: 8px 0 0 2px;
  color: #929c9e;
  font-size: 0.66rem;
  letter-spacing: 0.03em;
}

.ending-screen {
  place-items: center;
  overflow: hidden;
  color: var(--ink);
  background: #fff;
}

.ending-credit {
  position: absolute;
  top: 0;
  left: 50%;
  width: max-content;
  max-width: calc(100% - 32px);
  margin: 0;
  color: #202428;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(0.9rem, 2vw, 1.12rem);
  font-weight: 400;
  letter-spacing: 0.16em;
  line-height: 1.8;
  text-align: center;
  opacity: 0;
  transform: translate(-50%, -140%);
  will-change: top, transform, opacity;
}

.ending-credit.is-scrolling {
  animation: ending-credit-scroll var(--ending-credit-duration, 175.968s) linear forwards;
}

[hidden] {
  display: none !important;
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(239, 121, 95, 0.72);
  outline-offset: 3px;
}

@keyframes cloud-drift {
  to {
    transform: translateX(32px);
  }
}

@keyframes ending-credit-scroll {
  0% {
    top: 0;
    opacity: 0;
    transform: translate(-50%, -140%);
  }

  4% {
    opacity: 1;
  }

  96% {
    opacity: 1;
  }

  100% {
    top: 100%;
    opacity: 0;
    transform: translate(-50%, 40%);
  }
}

@keyframes bubble-in {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.97);
  }
}

@keyframes dialogue-in {
  0% {
    opacity: 0.45;
    transform: translateY(5px);
  }
}

@keyframes choice-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

@keyframes caret {
  50% {
    transform: translateY(4px) rotate(45deg);
    opacity: 0.35;
  }
}

@keyframes input-shake {
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

@media (max-width: 760px) {
  .title-content {
    width: 100%;
    padding: 26px;
  }

  .game-title {
    font-size: clamp(3.1rem, 17vw, 5.7rem);
  }

  .game-title .title-question {
    margin-left: 0;
    font-size: 0.46em;
  }

  .title-cloud-two {
    display: none;
  }

  .title-mountain {
    right: -26%;
    width: 120%;
  }

  .title-mountain-back {
    right: 8%;
  }

  .game-screen {
    padding: 10px;
  }

  .game-header {
    padding: 0 2px 8px;
  }

  .game-stage {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 52%) minmax(0, 48%);
    height: 100%;
    border-radius: 20px;
  }

  .scene-frame {
    border-bottom: 1px solid rgba(32, 51, 57, 0.08);
  }

  .conversation {
    overflow-y: auto;
    padding: 16px;
  }

  .player-echo {
    margin-bottom: 10px;
    padding: 9px 13px;
  }

  .dialogue-card {
    padding: 14px 16px;
    border-radius: 3px 17px 17px;
  }

  .heroine-line {
    font-size: clamp(1.08rem, 5vw, 1.35rem);
  }

  .dialogue-caret {
    right: 15px;
    bottom: 12px;
  }

  .choice-panel,
  .speech-form {
    margin-top: 12px;
  }

  .choice-button,
  .input-row input {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .send-button {
    padding: 0 15px;
  }

  .send-button span:first-child {
    display: none;
  }

  .input-hint {
    display: none;
  }
}

@media (max-height: 660px) and (orientation: landscape) {
  .game-screen {
    padding: 8px 12px;
  }

  .game-stage {
    grid-template-columns: minmax(220px, 0.8fr) minmax(360px, 1.2fr);
  }

  .conversation {
    padding: 18px 28px;
  }

  .player-echo {
    margin-bottom: 10px;
    padding: 8px 13px;
  }

  .dialogue-card {
    padding: 14px 18px;
  }

  .choice-panel,
  .speech-form {
    margin-top: 10px;
  }

  .input-hint {
    display: none;
  }
}

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