@charset "UTF-8";

/* ================= Top bar parts ================= */

.hearts {
  display: inline-flex;
  gap: 7px;
  align-items: center;
}

.hearts .heart {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  line-height: 0;
}

.hearts .heart:not(.is-empty) {
  color: var(--heart-pink);
}

.hearts .heart svg {
  display: block;
  overflow: visible;
}

.hearts .heart.is-empty { color: var(--border); }

.hearts .hearts-extra {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--heart-pink);
  line-height: 1;
}

.timer {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-2);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

/* ================= Auth card ================= */

.auth-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(237, 236, 234, 0.96));
  border: 1px solid rgba(94, 122, 110, 0.14);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 0 14px 34px rgba(42, 42, 42, 0.06);
}

.auth-card__actions {
  display: flex;
  gap: 10px;
  margin-top: 0;
}

.auth-card__actions--login-only {
  flex-direction: column;
  align-items: center;
}

/* Google sign-in card (index + drawer) */
a.card,
button.card {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  width: 100%;
  max-width: 360px;
  min-height: 52px;
  padding: 12px 18px;
  margin: 0;
  box-sizing: border-box;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(42, 42, 42, 0.06);
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.08s ease;
  -webkit-tap-highlight-color: transparent;
}

a.card[hidden],
button.card[hidden] {
  display: none;
}

button.card {
  font-family: inherit;
  text-align: left;
}

a.card:hover:not(.is-disabled):not(:disabled),
button.card:hover:not(:disabled):not(.is-disabled) {
  border-color: rgba(66, 133, 244, 0.45);
  box-shadow: 0 4px 14px rgba(42, 42, 42, 0.08);
}

a.card:active:not(.is-disabled):not(:disabled),
button.card:active:not(:disabled):not(.is-disabled) {
  transform: scale(0.99);
}

a.card.is-disabled,
a.card[aria-disabled="true"],
button.card:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.card__icon {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.card__google-mark {
  display: block;
}

.card__label {
  flex: 1;
  min-width: 0;
}

.card--logout .card__icon {
  display: none;
}

.card--logout {
  justify-content: center;
  text-align: center;
}

.card--logout .card__label {
  flex: none;
  color: rgb(237, 74, 74);
}

/* Apple Sign-in card */
.card--apple {
  background: #000;
  color: #fff;
  border-color: #000;
}

.card--apple:hover:not(.is-disabled):not(:disabled) {
  border-color: #333;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22);
}

/* Guest card (index.html ゲストで始めるボタン) */
.card--guest {
  justify-content: center;
  text-align: center;
  color: var(--text-2);
  background: transparent;
  border-color: var(--border);
}

.card--guest .card__label {
  flex: none;
  font-weight: 500;
}

/* Drawer guest info section */
.drawer-guest-label {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.drawer-guest-desc {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.55;
}

#drawer-guest-section {
  padding-bottom: 4px;
}

/* ================= Login page (index.html) ================= */

.login-page {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-3);
  padding-top: calc(var(--safe-area-top) + var(--space-4));
  padding-bottom: calc(var(--safe-area-bottom) + var(--space-4));
  padding-left: calc(var(--safe-area-left) + var(--space-3));
  padding-right: calc(var(--safe-area-right) + var(--space-3));
  background-color: var(--bg);
}

.login-screen {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.login-screen__brand {
  text-align: center;
}

.login-screen__eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.login-screen__title {
  margin: 0 0 8px;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.3;
}

.login-screen__lead {
  margin: 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.65;
}

.login-screen__card {
  width: 100%;
}

.login-legal-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 12px;
  margin-top: calc(var(--space-2) * -1);
  font-size: 12px;
  line-height: 1.6;
}

.login-legal-links a {
  color: var(--text-2);
  text-decoration: none;
}

.login-legal-links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* ================= Buttons ================= */

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 999px;
  color: var(--text);
  cursor: pointer;
  padding: 0;
}

.icon-btn:active { background-color: var(--bg-2); }

/* Top bar: glass pill icon buttons (same look as home menu) */
.icon-btn.top-bar__glass-btn {
  position: relative;
  flex-shrink: 0;
  width: var(--top-bar-glass-size);
  height: var(--top-bar-glass-size);
  min-width: var(--top-bar-glass-size);
  min-height: var(--top-bar-glass-size);
  border: var(--glass-border);
  background: var(--glass-gradient);
  box-shadow: var(--glass-shadow-bar);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  overflow: hidden;
  isolation: isolate;
}

/* 丸ボタン上部のきらめき */
.icon-btn.top-bar__glass-btn::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 18%;
  right: 18%;
  height: 42%;
  background: var(--glass-shine);
  border-radius: 999px;
  pointer-events: none;
  opacity: 0.85;
  z-index: -1;
}

.icon-btn.top-bar__glass-btn > svg {
  position: relative;
  z-index: 1;
}

.icon-btn.top-bar__glass-btn:active {
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.52) 0%,
    rgba(255, 255, 255, 0.28) 100%
  );
}

.icon-btn.top-bar__menu.top-bar__glass-btn {
  margin-left: auto;
}

body.math-mode-active .screen--home .icon-btn.top-bar__glass-btn {
  color: #146A90;
  background: rgba(255, 255, 255, 0.28);
  border-color: rgba(255, 255, 255, 0.48);
  box-shadow:
    0 14px 34px rgba(22, 104, 150, 0.11),
    0 4px 12px rgba(24, 74, 115, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.32);
  -webkit-backdrop-filter: blur(22px) saturate(1.22);
  backdrop-filter: blur(22px) saturate(1.22);
}

body.math-mode-active .screen--home .icon-btn.top-bar__glass-btn::before {
  opacity: 0.16;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.58) 0%,
    rgba(255, 255, 255, 0.12) 70%,
    rgba(255, 255, 255, 0) 100%
  );
}

body.math-mode-active .screen--home .icon-btn.top-bar__glass-btn:active {
  background: rgba(226, 250, 255, 0.38);
}

.icon-btn--soft { background-color: var(--bg-2); }
.icon-btn--tiny { width: 32px; height: 32px; }
.icon-btn--ghost { background: transparent; pointer-events: none; }

.icon { width: 22px; height: 22px; }
.icon-sm { width: 16px; height: 16px; }

.text-btn {
  border: none;
  background: transparent;
  color: var(--accent);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.text-btn:active { background-color: var(--accent-light); }

.text-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.text-btn--result-action {
  max-width: min(44vw, 180px);
  white-space: normal;
  line-height: 1.25;
  text-align: left;
}

.btn-filled,
.btn-outline,
.btn-danger {
  position: relative;
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition:
    transform 0.08s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
}

.btn-filled {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: #6fa68b;
  box-shadow:
    0 5px 18px rgba(42, 42, 42, 0.08),
    0 2px 5px  rgba(42, 42, 42, 0.05),
    inset 0 1.2px 0 rgba(255, 255, 255, 0.28),
    inset 0 -0.5px 0 rgba(30, 80, 58, 0.14);
}

.btn-filled::before { display: none; }
.btn-outline::before { display: none; }

.btn-filled:hover:not(:disabled) {
  background: #78b394;
}

.btn-outline {
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.92);
  background: var(--glass-gradient);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  box-shadow:
    0 5px 18px rgba(42, 42, 42, 0.08),
    0 2px 5px  rgba(42, 42, 42, 0.05),
    inset 0 1.2px 0 rgba(255, 255, 255, 0.98),
    inset 0 -0.5px 0 rgba(255, 255, 255, 0.35);
}

.btn-outline:hover:not(:disabled) {
  background: linear-gradient(145deg, rgba(255,255,255,0.90) 0%, rgba(255,255,255,0.65) 100%);
}

.btn-filled:active,
.btn-outline:active {
  transform: translateY(1px);
}

.btn-filled:active:not(:disabled) {
  box-shadow:
    0 3px 10px rgba(42, 42, 42, 0.10),
    0 1px 3px  rgba(42, 42, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    inset 0 -0.5px 0 rgba(30, 80, 58, 0.18);
}

.btn-outline:active:not(:disabled) {
  background: linear-gradient(145deg, rgba(255,255,255,0.72) 0%, rgba(255,255,255,0.50) 100%);
  box-shadow:
    0 2px 8px rgba(42, 42, 42, 0.06),
    0 1px 3px rgba(42, 42, 42, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.90),
    inset 0 -0.5px 0 rgba(255, 255, 255, 0.28);
}

.btn-danger {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: var(--danger);
  box-shadow:
    0 5px 18px rgba(42, 42, 42, 0.10),
    0 2px 5px  rgba(42, 42, 42, 0.06),
    inset 0 1.2px 0 rgba(255, 255, 255, 0.24),
    inset 0 -0.5px 0 rgba(100, 20, 20, 0.14);
}

.btn-danger:hover:not(:disabled) {
  background: #c47570;
}

.btn-danger:active {
  transform: translateY(1px);
}

.btn-danger:active:not(:disabled) {
  box-shadow:
    0 3px 10px rgba(42, 42, 42, 0.10),
    0 1px 3px  rgba(42, 42, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-danger:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-play {
  position: relative;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.86);
  color: var(--accent);
  border: 1px solid rgba(94, 122, 110, 0.14);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 28px rgba(28, 28, 30, 0.10);
  overflow: hidden;
  isolation: isolate;
  transition:
    transform 0.1s ease,
    box-shadow 0.15s ease,
    border-color 0.15s ease,
    background 0.15s ease;
}

/* Play ボタン上部のクリスタル光沢（三日月状のグロス） */
.btn-play::before {
  content: "";
  display: none;
}

/* 下側に淡い反射（底の仄かな明るさ） */
.btn-play::after {
  content: "";
  display: none;
}

.btn-play > svg {
  position: relative;
  z-index: 1;
}

.btn-play:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.94);
  border-color: rgba(94, 122, 110, 0.20);
  box-shadow: 0 14px 30px rgba(28, 28, 30, 0.12);
}

body.math-mode-active .screen--home .btn-play {
  background: rgba(255, 255, 255, 0.30);
  border-color: rgba(255, 255, 255, 0.48);
  box-shadow:
    0 18px 42px rgba(22, 104, 150, 0.11),
    0 5px 16px rgba(24, 74, 115, 0.06);
  -webkit-backdrop-filter: blur(22px) saturate(1.22);
  backdrop-filter: blur(22px) saturate(1.22);
}

body.math-mode-active .screen--home .btn-play:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.38);
  border-color: rgba(255, 255, 255, 0.56);
  box-shadow:
    0 20px 46px rgba(22, 104, 150, 0.13),
    0 6px 18px rgba(24, 74, 115, 0.07);
}

.btn-play:active { transform: scale(0.97); }

.btn-play:active:not(:disabled) {
  background: rgba(245, 248, 247, 0.96);
}

body.math-mode-active .screen--home .btn-play:active:not(:disabled) {
  background: rgba(255, 255, 255, 0.24);
}

.btn-play svg {
  width: 52px;
  height: 52px;
  margin-left: 4px;
}

.btn-sub {
  background: transparent;
  border: none;
  color: var(--text-2);
  font-size: 14px;
  padding: 10px 16px;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.btn-sub:active { background-color: var(--bg-2); }

/* ================= Camera buttons ================= */

.screen--camera .top-bar--overlay .icon-btn { color: #fff; }
.screen--camera .top-bar--overlay .icon-btn:active {
  background-color: rgba(255, 255, 255, 0.12);
}

.camera-controls .icon-btn--soft {
  background-color: rgba(255, 255, 255, 0.08);
  color: #fff;
  cursor: pointer;
}

.camera-controls .icon-btn--soft:active {
  background-color: rgba(255, 255, 255, 0.16);
}

.btn-capture {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-color: #fff;
  border: 4px solid rgba(255, 255, 255, 0.35);
  cursor: pointer;
  padding: 0;
  transition: transform 0.08s ease;
}

.btn-capture:active { transform: scale(0.94); }

/* ================= OCR preview parts ================= */

.ocr-edit {
  position: absolute;
  top: 8px;
  right: 8px;
  color: var(--text-2);
}

.ocr-text {
  width: 100%;
  height: 100%;
  min-height: 240px;
  border: none;
  background: transparent;
  resize: none;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  outline: none;
  padding: 0;
}

.ocr-text[readonly] { cursor: default; }

/* ================= Game parts ================= */

.blank {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 68px;
  padding: 2px 10px;
  margin: 0 2px;
  border-bottom: 1.5px solid var(--text-2);
  color: var(--text-2);
  font-size: 15px;
  vertical-align: baseline;
  cursor: pointer;
  border-radius: 2px;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.blank.is-filled {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background-color: var(--accent-light);
}

.blank.is-active {
  border-bottom-color: var(--accent);
  background-color: var(--accent-light);
  color: var(--accent);
}

/* Puzzle-snap pulse – plays when a flying choice lands on a blank */
@keyframes blank-snap {
  0%   { transform: scale(1.07) translateY(-1px); box-shadow: 0 0 0 4px rgba(60,107,87,0.18); }
  55%  { transform: scale(0.96) translateY(0);    box-shadow: 0 0 0 1px rgba(60,107,87,0.08); }
  100% { transform: scale(1)    translateY(0);    box-shadow: none; }
}

.blank.is-snap {
  animation: blank-snap 0.34s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes hint-pop {
  0%   { opacity: 0; transform: translateX(-50%) scale(0.80); }
  65%  { opacity: 1; transform: translateX(-50%) scale(1.06); }
  100% { opacity: 1; transform: translateX(-50%) scale(1); }
}

.blank-hint {
  display: none;
  position: absolute;
  top: calc(100% + 9px);
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  background: #ededea;
  border: 1.5px solid rgba(60, 107, 87, 0.3);
  border-radius: 8px;
  padding: 5px 10px;
  pointer-events: none;
  z-index: 10;
  align-items: center;
  gap: 4px;
  filter: drop-shadow(0 3px 8px rgba(0,0,0,0.14));
}

/* 上向き三角（吹き出しのしっぽ） */
.blank-hint::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-bottom-color: rgba(60, 107, 87, 0.3);
  border-top: none;
}

.blank-hint::after {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-bottom-color: #ededea;
  border-top: none;
}

.blank.has-hint .blank-hint {
  display: inline-flex;
  animation: hint-pop 0.26s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.hint-shown {
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  vertical-align: middle;
  letter-spacing: 0.06em;
}

.hint-box {
  display: inline-block;
  width: 10px;
  height: 14px;
  background: rgba(60, 107, 87, 0.08);
  border: 1.5px solid rgba(60, 107, 87, 0.45);
  border-radius: 3px;
  vertical-align: middle;
  flex-shrink: 0;
}

.blank .blank-label {
  font-size: 11px;
  color: var(--text-2);
  margin-right: 4px;
}

.blank.is-filled .blank-label,
.blank.is-active .blank-label {
  color: var(--accent);
}

.choices {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  align-content: flex-start;
  padding: var(--space-3);
  margin-top: var(--space-2);
  border-radius: var(--glass-radius-panel);
  background: var(--glass-gradient);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow-panel);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  overflow: hidden;
  isolation: isolate;
}

.choices::before {
  content: "";
  position: absolute;
  top: 0;
  left: 5%;
  right: 5%;
  height: 40%;
  background: var(--glass-shine);
  border-radius: var(--glass-radius-panel) var(--glass-radius-panel) 50% 50%
    / var(--glass-radius-panel) var(--glass-radius-panel) 100% 100%;
  pointer-events: none;
  opacity: 0.72;
  z-index: -1;
}

/* ゲーム肢: トップバーの glass 丸ボタン（top-bar__glass-btn）と同系の見た目 */
.choice {
  position: relative;
  border: var(--glass-border);
  background: var(--glass-gradient);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--glass-shadow-bar);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  overflow: hidden;
  isolation: isolate;
  transition:
    transform 0.12s ease,
    background 0.12s ease,
    opacity 0.15s ease,
    box-shadow 0.15s ease;
}

.choice::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 18%;
  right: 18%;
  height: 42%;
  background: var(--glass-shine);
  border-radius: 999px;
  pointer-events: none;
  opacity: 0.85;
  z-index: -1;
}

.choice:hover:not(:disabled):not(.is-used) {
  box-shadow:
    0 8px 26px rgba(42, 42, 42, 0.09),
    0 3px 8px rgba(42, 42, 42, 0.05),
    inset 0 1.2px 0 rgba(255, 255, 255, 0.98),
    inset 0 -0.5px 0 rgba(255, 255, 255, 0.35);
  transform: translateY(-1px);
}

.choice:active:not(:disabled) {
  transform: translateY(0);
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.52) 0%,
    rgba(255, 255, 255, 0.28) 100%
  );
}

.choice.is-used {
  opacity: 0.3;
  pointer-events: none;
}

/* ================= Result parts ================= */

.result-mark {
  width: 72px;
  height: 72px;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.result-mark svg { width: 100%; height: 100%; }

.result-mark.is-partial { color: var(--text-2); }
.result-mark.is-fail { color: var(--danger); }

.result-score {
  font-size: 28px;
  font-weight: 500;
  margin: 0;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.result-sentence {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
  max-width: 320px;
  margin: var(--space-1) 0 var(--space-4);
}

.result-sentence .blank-word {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding: 0 2px;
}

.result-sentence .blank-word.is-wrong {
  color: var(--danger);
  border-bottom-color: var(--danger);
  text-decoration: line-through;
}

/* ================= App menu drawer (main.html) ================= */

body.drawer-open {
  overflow: hidden;
}

.app-drawer {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  justify-content: flex-end;
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
  pointer-events: none;
}

.app-drawer.is-open {
  pointer-events: auto;
}

.app-drawer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(42, 42, 42, 0.38);
  opacity: 0;
  transition: opacity 0.22s ease;
}

.app-drawer.is-open .app-drawer__backdrop {
  opacity: 1;
}

.app-drawer__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(100%, 320px);
  max-width: 100%;
  min-height: 100%;
  background: linear-gradient(
    165deg,
    rgba(255, 255, 255, 0.92) 0%,
    rgba(248, 247, 244, 0.86) 55%,
    rgba(237, 236, 234, 0.9) 100%
  );
  border-left: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow:
    -16px 0 48px rgba(42, 42, 42, 0.18),
    -2px 0 6px rgba(42, 42, 42, 0.05),
    inset 1.5px 0 0 rgba(255, 255, 255, 1);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  backdrop-filter: blur(24px) saturate(1.5);
  transform: translateX(100%);
  transition: transform 0.24s ease;
  overflow: hidden;
  isolation: isolate;
}

/* ドロワー左縁に沿った縦の光沢 */
.app-drawer__panel::before {
  content: "";
  position: absolute;
  top: 6%;
  bottom: 6%;
  left: 0;
  width: 36%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0.2) 45%,
    rgba(255, 255, 255, 0) 100%
  );
  pointer-events: none;
  opacity: 0.65;
  z-index: -1;
}

.app-drawer.is-open .app-drawer__panel {
  transform: translateX(0);
}

.app-drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: calc(var(--safe-area-top) + var(--space-2)) var(--space-3) var(--space-2);
  border-bottom: 1px solid rgba(94, 122, 110, 0.12);
}

.app-drawer__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.app-drawer__close {
  flex-shrink: 0;
}

.app-drawer__body {
  flex: 1;
  overflow: auto;
  padding: var(--space-3) var(--space-3) calc(var(--space-3) + var(--safe-area-bottom));
  -webkit-overflow-scrolling: touch;
}

.auth-card--drawer {
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
}

.auth-card__actions--drawer {
  flex-direction: column;
  gap: 12px;
}

.auth-card__actions--drawer .card {
  position: relative;
  max-width: none;
  border-radius: 16px;
  background: linear-gradient(
    155deg,
    rgba(255, 255, 255, 0.78) 0%,
    rgba(255, 255, 255, 0.48) 45%,
    rgba(255, 255, 255, 0.3) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow:
    0 12px 32px rgba(42, 42, 42, 0.09),
    0 4px 12px rgba(42, 42, 42, 0.05),
    inset 0 1.4px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(94, 122, 110, 0.06);
  -webkit-backdrop-filter: blur(22px) saturate(1.6) brightness(1.04);
  backdrop-filter: blur(22px) saturate(1.6) brightness(1.04);
  overflow: hidden;
  isolation: isolate;
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.12s ease,
    background 0.18s ease;
}

.auth-card__actions--drawer .card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 6%;
  right: 6%;
  height: 48%;
  background: var(--glass-shine);
  border-radius: 16px 16px 50% 50% / 16px 16px 100% 100%;
  pointer-events: none;
  opacity: 0.82;
  z-index: -1;
}

.auth-card__actions--drawer a.card:hover:not(.is-disabled):not(:disabled),
.auth-card__actions--drawer button.card:hover:not(:disabled):not(.is-disabled) {
  border-color: rgba(255, 255, 255, 0.92);
  box-shadow:
    0 14px 36px rgba(42, 42, 42, 0.11),
    0 5px 14px rgba(42, 42, 42, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.98),
    inset 0 -1px 0 rgba(94, 122, 110, 0.05);
  transform: translateY(-2px);
}

.auth-card__actions--drawer a.card:active:not(.is-disabled):not(:disabled),
.auth-card__actions--drawer button.card:active:not(:disabled):not(.is-disabled) {
  transform: scale(0.99) translateY(0);
  box-shadow:
    0 6px 18px rgba(42, 42, 42, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.75),
    inset 0 -1px 0 rgba(94, 122, 110, 0.08);
}

/* ===================== Top-bar title ===================== */

.top-bar__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

/* ===================== History cards ===================== */

.history-card {
  position: relative;
  width: 100%;
  text-align: left;
  background: var(--glass-gradient);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow-panel);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-3);
  cursor: pointer;
  overflow: hidden;
  isolation: isolate;
  transition:
    transform 0.12s ease,
    box-shadow 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.history-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 5%;
  right: 5%;
  height: 50%;
  background: var(--glass-shine);
  border-radius: var(--radius-lg) var(--radius-lg) 50% 50%
    / var(--radius-lg) var(--radius-lg) 100% 100%;
  pointer-events: none;
  opacity: 0.78;
  z-index: -1;
}

.history-card:active {
  transform: scale(0.98);
  box-shadow: var(--glass-shadow-bar);
}

.history-card__headline {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.history-card__text {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
  word-break: break-all;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.history-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 2px;
}

.history-card__date {
  font-size: 11px;
  color: var(--text-2);
  line-height: 1;
}

.history-card__del {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  padding: 0;
  margin: -6px -6px -6px 0;
  transition: color 0.15s ease, background 0.15s ease;
}

.history-card__del:active {
  color: var(--danger);
  background: rgba(181, 107, 102, 0.1);
}

/* ===================== Toast ===================== */
/* AdMob バナー高さ（--ad-banner-height）分だけ上にずらし、0.5rem だけ余白 */
.toast {
  position: fixed;
  bottom: calc(
    env(safe-area-inset-bottom, 0px) + 1.5rem + var(--ad-banner-height, 0px) + 0.5rem
  );
  left: 50%;
  transform: translateX(-50%) translateY(0.5rem);
  background: var(--text);
  color: var(--bg);
  padding: 0.55rem 1.25rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  white-space: nowrap;
  opacity: 0;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease;
  pointer-events: none;
  z-index: 300;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Result screen top-bar (transparent, icons only) */
.top-bar--result {
  justify-content: space-between;
  background: transparent;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-bottom: none;
}

/* ===================== Shop Modal ===================== */

body.shop-open {
  overflow: hidden;
}

/* 購入処理中オーバーレイ */
.purchase-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.purchase-overlay.is-active {
  pointer-events: auto;
}

.purchase-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(42, 42, 42, 0.32);
  opacity: 0;
  transition: opacity 0.22s ease;
}

.purchase-overlay.is-active .purchase-overlay__backdrop {
  opacity: 1;
}

.purchase-overlay__box {
  position: relative;
  background: var(--glass-gradient);
  border: var(--glass-border);
  border-radius: 24px;
  padding: 36px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  box-shadow: 0 12px 40px rgba(42, 42, 42, 0.14);
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.32, 0.72, 0, 1);
}

.purchase-overlay.is-active .purchase-overlay__box {
  opacity: 1;
  transform: scale(1);
}

/* アイコン共通 */
.purchase-overlay__icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.purchase-overlay__icon svg {
  width: 100%;
  height: 100%;
}

/* デフォルトはスピナー表示、check/failは非表示 */
.purchase-overlay__icon--check,
.purchase-overlay__icon--fail {
  display: none;
}

/* 成功ステート */
.purchase-overlay.is-success .purchase-overlay__icon--spin { display: none; }
.purchase-overlay.is-success .purchase-overlay__icon--check { display: flex; color: var(--accent); }
.purchase-overlay.is-success .purchase-overlay__text { color: var(--accent); }

/* 失敗ステート */
.purchase-overlay.is-error .purchase-overlay__icon--spin { display: none; }
.purchase-overlay.is-error .purchase-overlay__icon--fail { display: flex; color: var(--danger); }
.purchase-overlay.is-error .purchase-overlay__text { color: var(--danger); }

.purchase-overlay__spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(60, 107, 87, 0.16);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: purchase-spin 0.75s linear infinite;
}

@keyframes purchase-spin {
  to { transform: rotate(360deg); }
}

.purchase-overlay__text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  letter-spacing: 0.03em;
  transition: color 0.18s ease;
}

.shop-modal {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
  pointer-events: none;
}

.shop-modal.is-open {
  pointer-events: auto;
}

.shop-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(42, 42, 42, 0.42);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.shop-modal.is-open .shop-modal__backdrop {
  opacity: 1;
}

.shop-modal__panel {
  position: relative;
  width: min(100%, 480px);
  max-height: 90vh;
  max-height: 90dvh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(
    165deg,
    rgba(255, 255, 255, 0.92) 0%,
    rgba(248, 247, 244, 0.84) 55%,
    rgba(237, 236, 234, 0.86) 100%
  );
  border-top: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 24px 24px 0 0;
  box-shadow:
    0 -12px 48px rgba(42, 42, 42, 0.18),
    0 -2px 6px rgba(42, 42, 42, 0.05),
    inset 0 1.6px 0 rgba(255, 255, 255, 1);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  backdrop-filter: blur(24px) saturate(1.5);
  transform: translateY(100%);
  transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
  overflow: hidden;
  isolation: isolate;
  padding-bottom: calc(var(--safe-area-bottom) + var(--ad-banner-height, 0px));
}

/* モーダル上縁に沿った光の筋 */
.shop-modal__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 34%;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.85) 0%,
    rgba(255, 255, 255, 0.4) 45%,
    rgba(255, 255, 255, 0) 100%
  );
  border-radius: 24px 24px 50% 50% / 24px 24px 100% 100%;
  pointer-events: none;
  opacity: 0.9;
  z-index: -1;
}

.shop-modal.is-open .shop-modal__panel {
  transform: translateY(0);
}

.shop-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-3) var(--space-2);
  border-bottom: 1px solid rgba(94, 122, 110, 0.12);
  flex-shrink: 0;
}

.shop-modal__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.shop-modal__close {
  flex-shrink: 0;
}

.shop-modal__body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-3) var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.btn-text {
  background: none;
  border: none;
  color: var(--text-2);
  font-size: 13px;
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  text-decoration: underline;
}

.shop-restore {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-1) 0 0;
}

.shop-commercial-link {
  display: inline-flex;
  text-align: center;
}

.shop-legal-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px 0 var(--space-1);
}

.shop-legal-link {
  display: inline-flex;
  text-align: center;
}

.shop-legal-sep {
  font-size: 12px;
  color: var(--text-2);
}

.shop-item__hint {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
}

/* ---- Login notice ---- */

.shop-login-notice {
  margin: 0 0 var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: rgba(94, 122, 110, 0.08);
  border-radius: var(--radius-md);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  text-align: center;
}

/* ---- Section ---- */

.shop-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.shop-section__title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-2);
  text-transform: uppercase;
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--border);
}

.shop-section__grid {
  display: grid;
  gap: var(--space-2);
}

.shop-section__grid--single {
  grid-template-columns: 1fr;
}

.shop-section__grid--double {
  grid-template-columns: 1fr 1fr;
}

/* ---- Item card ---- */

.shop-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-3);
  background: var(--glass-gradient);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow-panel);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  border-radius: var(--radius-lg);
  overflow: hidden;
  isolation: isolate;
  transition: opacity 0.15s ease;
}

.shop-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 5%;
  right: 5%;
  height: 44%;
  background: var(--glass-shine);
  border-radius: var(--radius-lg) var(--radius-lg) 50% 50%
    / var(--radius-lg) var(--radius-lg) 100% 100%;
  pointer-events: none;
  opacity: 0.78;
  z-index: -1;
}

.shop-item.is-unavailable {
  opacity: 0.75;
}

.shop-item--featured {
  border-top: 3px solid var(--accent);
  box-shadow: 0 2px 20px rgba(60, 107, 87, 0.2), var(--glass-shadow-panel);
}

.shop-item__name {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

/* Single-column items use slightly larger name */
.shop-section__grid--single .shop-item__name {
  font-size: 15px;
}

.shop-item__desc {
  margin: 0;
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.55;
  white-space: pre-line;
}

.shop-item__error {
  margin: 0;
  font-size: 11px;
  color: var(--danger);
  line-height: 1.45;
}

.shop-item__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: 6px;
}

.shop-item__price {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

/* Double-column price: smaller */
.shop-section__grid--double .shop-item__price {
  font-size: 13px;
}

/* ポップアップの .btn-filled と同一トーン。カード内用にサイズのみ調整 */
.shop-item__btn.btn-filled {
  flex-shrink: 0;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
}

.shop-item__btn.btn-filled::before {
  display: none;
}

.shop-item__btn.btn-filled:hover:not(:disabled):not(.is-disabled) {
  background: #78b394;
}

.shop-item__btn.btn-filled:active:not(:disabled):not(.is-disabled) {
  transform: translateY(1px);
}

.shop-item__btn.btn-filled:disabled,
.shop-item__btn.btn-filled.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: #95ada0;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    inset 0 -0.5px 0 rgba(30, 80, 58, 0.1);
}

/* ===================== Reward life prompt (home) ===================== */

body.reward-prompt-open,
body.home-confirm-open,
body.play-confirm-open,
body.camera-denied-open,
body.math-subscribe-open {
  overflow: hidden;
}

.reward-life-prompt__actions--single {
  justify-content: center;
}

.reward-life-prompt__actions--single .btn-filled {
  flex: 0 0 auto;
  min-width: 120px;
}

.reward-life-prompt {
  position: fixed;
  inset: 0;
  z-index: 160;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    calc(var(--space-3) + var(--safe-area-top))
    calc(var(--space-3) + var(--safe-area-right))
    calc(var(--space-3) + var(--safe-area-bottom))
    calc(var(--space-3) + var(--safe-area-left));
  pointer-events: none;
}

.reward-life-prompt.is-open {
  pointer-events: auto;
}

.reward-life-prompt__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(42, 42, 42, 0.32);
  opacity: 0;
  transition: opacity 0.22s ease;
}

.reward-life-prompt.is-open .reward-life-prompt__backdrop {
  opacity: 1;
}

.reward-life-prompt__panel {
  position: relative;
  width: min(100%, 340px);
  margin: 0 auto;
  padding: var(--space-4);
  /* 明るめ・軽いガラス（blur は弱め、brightness で沈まない） */
  background: linear-gradient(
    155deg,
    rgba(255, 255, 255, 0.86) 0%,
    rgba(252, 251, 249, 0.72) 42%,
    rgba(246, 245, 242, 0.68) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(12px) saturate(1.28) brightness(1.07);
  backdrop-filter: blur(12px) saturate(1.28) brightness(1.07);
  box-shadow:
    0 12px 38px rgba(28, 28, 30, 0.09),
    0 2px 10px rgba(28, 28, 30, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  transform: scale(0.94);
  opacity: 0;
  overflow: hidden;
  transition: opacity 0.22s ease, transform 0.22s cubic-bezier(0.32, 0.72, 0, 1);
}

/* ごく薄い上端ハイライト（パネル自体は明るいまま） */
.reward-life-prompt__panel::before {
  display: block;
  content: "";
  position: absolute;
  top: 0;
  left: 14%;
  right: 14%;
  height: 28%;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.38) 0%,
    rgba(255, 255, 255, 0.06) 58%,
    rgba(255, 255, 255, 0) 100%
  );
  border-radius: 999px;
  pointer-events: none;
  z-index: 0;
}

.reward-life-prompt.is-open .reward-life-prompt__panel {
  transform: scale(1);
  opacity: 1;
}

.reward-life-prompt__title {
  position: relative;
  z-index: 1;
  margin: 0 0 var(--space-2);
  font-size: 17px;
  font-weight: 700;
  text-align: center;
}

.reward-life-prompt__text {
  position: relative;
  z-index: 1;
  margin: 0 0 var(--space-4);
  font-size: 15px;
  line-height: 1.55;
  text-align: center;
  color: var(--text);
}

.reward-life-prompt__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.reward-life-prompt__actions .btn-outline,
.reward-life-prompt__actions .btn-filled,
.reward-life-prompt__actions .btn-danger {
  flex: 1 1 120px;
  min-width: 0;
}

.reward-life-prompt__actions--stack {
  flex-direction: column;
  align-items: stretch;
  margin-top: 0;
}

.reward-life-prompt__actions--stack .btn-outline,
.reward-life-prompt__actions--stack .btn-filled,
.reward-life-prompt__actions--stack .btn-danger {
  flex: none;
  width: 100%;
}

/* ================= Delete Account Modal ================= */

.delete-account-panel {
  max-height: calc(90vh - var(--safe-area-top) - var(--safe-area-bottom));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.delete-account-select-panel {
  text-align: left;
}

.delete-account-candidates {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: var(--space-3) 0;
}

.delete-account-option {
  width: 100%;
  padding: 12px 14px;
  text-align: left;
  color: var(--text);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(0, 0, 0, 0.10);
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(42, 42, 42, 0.05);
  cursor: pointer;
}

.delete-account-option.is-selected {
  border-color: rgba(181, 107, 102, 0.75);
  box-shadow: 0 0 0 3px rgba(181, 107, 102, 0.12);
}

.delete-account-option:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.delete-account-option__label,
.delete-account-target__label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
}

.delete-account-option__detail,
.delete-account-target__detail {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--text-2);
  word-break: break-word;
}

.delete-account-target {
  margin: 0 0 var(--space-3);
  padding: 10px 12px;
  text-align: left;
  background: rgba(181, 107, 102, 0.08);
  border: 1px solid rgba(181, 107, 102, 0.18);
  border-radius: 10px;
}

.delete-account-section {
  margin-bottom: var(--space-3);
  text-align: left;
}

.delete-account-section__heading {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-1);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
}

.delete-account-section__heading--lost {
  color: var(--danger);
  background: rgba(181, 107, 102, 0.10);
}

.delete-account-section__heading--kept {
  color: #4a8c6e;
  background: rgba(74, 140, 110, 0.10);
}

.delete-account-list {
  margin: 0;
  padding: 0 0 0 var(--space-3);
  list-style: disc;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.delete-account-list li {
  margin-bottom: 2px;
}

.delete-account-list__note {
  font-size: 11px;
  color: #888;
  display: block;
  margin-top: 2px;
}

.delete-account-policy {
  font-size: 12px;
  color: #888;
  text-align: center;
  margin: var(--space-2) 0;
  line-height: 1.5;
}

.delete-account-policy__link {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: #5a8fc8;
  text-decoration: underline;
  cursor: pointer;
  line-height: inherit;
}

.delete-account-agree {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  margin: var(--space-2) 0 var(--space-3);
  position: relative;
  z-index: 1;
}

.delete-account-agree__input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.delete-account-agree__box {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  border: 1.5px solid rgba(0, 0, 0, 0.20);
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
  margin-top: 1px;
}

.delete-account-agree__input:checked + .delete-account-agree__box {
  background: var(--danger);
  border-color: var(--danger);
}

.delete-account-agree__input:checked + .delete-account-agree__box::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}

.delete-account-agree__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  user-select: none;
}

/* ================= Math Mode ================= */

/* ホーム右側スタック（・・・ + √） */
.top-bar__right-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

/* √ボタン — 通常時はメニューボタンと同じ見た目 */
.top-bar__math-btn {
  width: 36px;
  height: 36px;
  opacity: 0.55;
  transition: opacity 0.18s, color 0.18s, background 0.18s, border-color 0.18s;
}

/* 理数モードON時 */
.top-bar__math-btn.is-active {
  opacity: 1;
  color: #fff;
  background: rgba(39, 191, 224, 0.38);
  border-color: rgba(218, 251, 255, 0.52);
  box-shadow:
    0 14px 34px rgba(22, 104, 150, 0.12),
    0 4px 12px rgba(24, 74, 115, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.30);
  -webkit-backdrop-filter: blur(20px) saturate(1.24);
  backdrop-filter: blur(20px) saturate(1.24);
}

.top-bar__math-btn.is-active::before {
  opacity: 0.14;
}

.top-bar__math-btn.is-active:active {
  background: rgba(31, 174, 208, 0.46);
}

/* カメラ画面: 数学TIP（camera-stage 内に配置） */
.camera-math-tip {
  position: absolute;
  bottom: var(--space-4);
  left: 0;
  right: 0;
  padding: 0 var(--space-4);
  text-align: center;
  pointer-events: none;
}

.camera-math-tip__text {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 6px rgba(0,0,0,0.5);
  margin: 0 0 4px;
}

.camera-math-tip__sub {
  font-size: 12px;
  color: rgba(255,255,255,0.82);
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
  margin: 0;
  line-height: 1.5;
}

/* 理数ゲーム画面レイアウト */
.math-game-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3) var(--space-5);
  overflow-y: auto;
}

/* 解法タグ */
.math-method-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 999px;
  padding: 3px 12px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.math-progress-tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  background: rgba(255,255,255,0.65);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}

/* カード共通ラベル */
.math-card-label {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 999px;
  padding: 2px 10px;
}

/* 問題カード */
.math-problem-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border-top: 3px solid var(--accent);
  box-shadow: 0 2px 12px rgba(42,42,42,0.07);
  padding: var(--space-3) var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* 問題文 */
.math-problem {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.7;
  margin: 0;
  white-space: pre-wrap;
  overflow-x: auto;
}

/* KaTeX が生成する要素が問題文カード内で収まるよう調整 */
.math-problem .katex-display {
  margin: 0.4em 0;
}

/* 選択肢セクション */
.math-choices-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.math-choices-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.math-choices-hint-text {
  font-size: 12px;
  color: var(--text-2);
}

/* 選択肢リスト（縦並び） */
.math-choices {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
}

/* 各選択肢ボタン */
.math-choice {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  min-height: 56px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: 16px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  border: 1.5px solid var(--border);
  box-shadow: 0 2px 8px rgba(42,42,42,0.05);
  cursor: pointer;
  text-align: left;
  transition: transform 0.12s, background 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.math-choice:active {
  transform: scale(0.985);
}

/* A/B/C 丸バッジ */
.math-choice__label {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.math-choice__text {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  line-height: 1.5;
}

/* KaTeX 数式が選択肢内で折り返さないよう横スクロール許可 */
.math-choice__text .katex {
  white-space: nowrap;
}

.math-choice.is-correct {
  background: var(--accent-light);
  border-color: var(--accent);
}

.math-choice.is-correct .math-choice__label {
  background: var(--accent);
  color: #fff;
}

.math-choice.is-correct .math-choice__text {
  color: var(--accent);
  font-weight: 600;
}

.math-choice.is-wrong {
  background: #F5EBEB;
  border-color: var(--danger);
}

.math-choice.is-wrong .math-choice__label {
  background: var(--danger);
  color: #fff;
}

.math-choice.is-wrong .math-choice__text {
  color: var(--danger);
}

.math-choice:disabled {
  cursor: default;
}

/* ヒントエリア（hidden だが念のためスタイル維持） */
.math-hints {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.math-hint-card {
  background: rgba(255,255,255,0.65);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.55;
  animation: hintFadeIn 0.28s ease forwards;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.math-hint-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent, #5b8fcf);
  text-transform: uppercase;
}

.math-hint-tendency {
  font-size: 12px;
  color: #c07030;
  background: rgba(192, 112, 48, 0.08);
  border-left: 3px solid #c07030;
  border-radius: 0 var(--radius-sm, 4px) var(--radius-sm, 4px) 0;
  padding: 4px 8px;
  margin: 0;
  line-height: 1.45;
}

.math-hint-body {
  color: var(--text-2);
  line-height: 1.6;
}

/* 解き方フローカード */
.math-hint-card--solution {
  background: rgba(91, 143, 207, 0.07);
  border-color: rgba(91, 143, 207, 0.35);
}

.math-hint-solution__title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent, #5b8fcf);
  text-transform: uppercase;
  margin: 0;
}

.math-hint-solution__steps {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13.5px;
  color: var(--text-1);
  line-height: 1.65;
}

.math-hint-solution__steps li {
  padding-left: 2px;
}

@keyframes hintFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ヒントボタン（hidden） */
.math-hint-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: transparent;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-2);
  cursor: pointer;
  transition: opacity 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.math-hint-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

/* 数学モード体験バナー */
.math-trial-banner {
  position: fixed;
  bottom: calc(var(--safe-area-bottom) + 16px);
  left: 16px;
  right: 16px;
  z-index: 60;
  transform: translateY(calc(100% + 24px));
  opacity: 0;
  transition: transform 0.38s cubic-bezier(0.32, 0.72, 0, 1), opacity 0.28s ease;
  pointer-events: none;
}

.math-trial-banner.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.math-trial-banner__inner {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--glass-gradient);
  border: var(--glass-border);
  border-radius: 16px;
  padding: 12px var(--space-2);
  -webkit-backdrop-filter: var(--glass-backdrop);
  backdrop-filter: var(--glass-backdrop);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.13);
}

.math-trial-banner__icon {
  color: var(--accent);
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.math-trial-banner__body {
  flex: 1;
  min-width: 0;
}

.math-trial-banner__title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  line-height: 1.4;
}

.math-trial-banner__sub {
  font-size: 11px;
  color: var(--text-2);
  margin: 2px 0 0;
}

.math-trial-banner__btn {
  font-size: 13px;
  padding: 7px 13px;
  flex-shrink: 0;
  white-space: nowrap;
}

.math-trial-banner__close {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  color: var(--text-2);
}

/* 理数結果画面 解き方 */
/* 答え合わせ画面の解法バッジ */
.math-result-method {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 999px;
  padding: 4px 16px;
  letter-spacing: 0.03em;
  margin: var(--space-2) 0 var(--space-1);
}

.math-result-solution {
  width: 100%;
  max-width: 320px;
  background: var(--surface, #f5f5f5);
  border-radius: 12px;
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-3);
  text-align: left;
}

.math-result-solution__title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted, #888);
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
}

.math-result-solution__steps {
  margin: 0;
  padding-left: 1.4em;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.math-result-solution__steps li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

/* 理数結果画面ボタン群 */
.math-result-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  max-width: 280px;
  margin-top: var(--space-3);
}

.math-result-actions .btn-outline,
.math-result-actions .btn-filled {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}