:root {
  --bg: #12151c;
  --bg-card: #1b202b;
  --bg-card-2: #232936;
  --fg: #eef1f6;
  --fg-dim: #9aa3b2;
  --accent: #5fa8ff;
  --accent-2: #6ee7a8;
  --ko: #ffb86b;
  --danger: #ff7a7a;
  --radius: 14px;
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

/* display:flex 等が hidden 属性に勝ってしまうのを防ぐ */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP",
               "Yu Gothic UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: contain;
}

body { padding-bottom: calc(24px + var(--safe-b)); }

main { padding: 0 14px; max-width: 720px; margin: 0 auto; }

/* ---------------------------------------------------------------- topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 16px calc(12px + env(safe-area-inset-top, 0px));
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
  background: rgba(18, 21, 28, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #262c3a;
}

.topbar h1 { font-size: 17px; margin: 0; font-weight: 700; letter-spacing: .02em; }

.icon-btn {
  background: var(--bg-card);
  border: 1px solid #2e3648;
  color: var(--fg);
  width: 38px; height: 38px;
  border-radius: 10px;
  font-size: 18px;
  cursor: pointer;
}

/* --------------------------------------------------------------- capture */

.capture { padding: 18px 0 8px; }

.shoot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 34px 20px;
  background: linear-gradient(160deg, #22304a, #1b2130);
  border: 1px solid #33405a;
  border-radius: 20px;
  cursor: pointer;
  text-align: center;
  transition: transform .08s ease;
}
.shoot:active { transform: scale(.985); }
.shoot-icon { font-size: 46px; line-height: 1; }
.shoot-label { font-size: 20px; font-weight: 700; }
.shoot-sub { font-size: 13px; color: var(--fg-dim); }

.pick {
  display: block;
  margin-top: 10px;
  padding: 13px;
  text-align: center;
  font-size: 15px;
  color: var(--fg-dim);
  background: var(--bg-card);
  border: 1px solid #2b3244;
  border-radius: var(--radius);
  cursor: pointer;
}

/* --------------------------------------------------------------- preview */

.preview { margin: 14px 0 6px; }
.preview img {
  width: 100%;
  max-height: 34vh;
  object-fit: contain;
  border-radius: var(--radius);
  background: #0c0e13;
  border: 1px solid #262c3a;
}
.preview-actions { display: flex; gap: 8px; margin-top: 8px; }

.btn {
  flex: 1;
  padding: 11px 14px;
  font-size: 15px;
  font-weight: 600;
  color: #0d1017;
  background: var(--accent);
  border: none;
  border-radius: 11px;
  cursor: pointer;
}
.btn.ghost {
  background: var(--bg-card);
  color: var(--fg);
  border: 1px solid #2e3648;
}

/* ---------------------------------------------------------------- status */

.status {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 14px 0;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid #2b3244;
  border-radius: var(--radius);
}
.status-text { display: flex; flex-direction: column; gap: 3px; }
.status-text span { font-size: 13px; color: var(--fg-dim); }

.spinner {
  width: 26px; height: 26px;
  flex: none;
  border: 3px solid #34405a;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error {
  margin: 14px 0;
  padding: 14px 16px;
  background: #2a1a1e;
  border: 1px solid #5a2b34;
  border-radius: var(--radius);
  color: #ffc9c9;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

/* --------------------------------------------------------------- toggles */

.toggles {
  position: sticky;
  top: calc(62px + env(safe-area-inset-top, 0px));
  z-index: 15;
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding: 10px 0;
  margin: 4px -14px 0;
  padding-left: 14px;
  padding-right: 14px;
  background: rgba(18, 21, 28, .95);
  backdrop-filter: blur(8px);
  scrollbar-width: none;
}
.toggles::-webkit-scrollbar { display: none; }

.chip {
  flex: none;
  padding: 8px 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--fg-dim);
  background: var(--bg-card);
  border: 1px solid #2e3648;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
}
.chip.on { color: #0d1017; background: var(--accent); border-color: var(--accent); }

/* ---------------------------------------------------------------- result */

.result { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }

.line-card {
  padding: 14px 14px 12px;
  background: var(--bg-card);
  border: 1px solid #262c3a;
  border-radius: var(--radius);
}
.line-card.low { border-color: #6b5324; }

.line-head { display: flex; align-items: flex-start; gap: 10px; }

.jp {
  flex: 1;
  font-size: 23px;
  line-height: 2.1;
  font-weight: 600;
  word-break: break-word;
}
.jp.wakachi .tok { margin-right: .42em; }

.tok {
  display: inline-block;
  border-bottom: 1.5px solid transparent;
  cursor: pointer;
}
.jp.wakachi .tok { border-bottom-color: #38425a; }
.tok:active { opacity: .55; }
.tok[data-pos="助詞"], .tok[data-pos="助動詞"] { color: #b9c2d4; }
.tok[data-pos="記号"] { color: var(--fg-dim); }

ruby { ruby-position: over; }
rt {
  font-size: .46em;
  font-weight: 500;
  color: var(--accent-2);
  letter-spacing: .02em;
}

.speak {
  flex: none;
  width: 36px; height: 36px;
  margin-top: 4px;
  font-size: 17px;
  color: var(--fg);
  background: var(--bg-card-2);
  border: 1px solid #333c50;
  border-radius: 10px;
  cursor: pointer;
}

.aux {
  margin-top: 9px;
  padding-top: 9px;
  border-top: 1px dashed #2d3547;
  font-size: 15.5px;
  line-height: 1.65;
  word-break: break-word;
}
.aux .label {
  display: inline-block;
  min-width: 4.6em;
  margin-right: 8px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--fg-dim);
  vertical-align: 1px;
}
.aux.romaji .val { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .01em; }
.aux.hangul .val { color: #cfe3ff; }
.aux.korean .val { color: var(--ko); }

.conf { margin-top: 8px; font-size: 11.5px; color: #d9b463; }

.empty {
  padding: 26px 16px;
  text-align: center;
  color: var(--fg-dim);
  font-size: 14px;
}

.meta { margin: 16px 2px; font-size: 11.5px; color: var(--fg-dim); text-align: center; }

/* ----------------------------------------------------------------- sheet */

.sheet {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: rgba(0, 0, 0, .55);
  backdrop-filter: blur(2px);
}
.sheet-body {
  position: relative;
  width: 100%;
  max-width: 720px;
  max-height: 84vh;
  overflow-y: auto;
  padding: 20px 18px calc(22px + var(--safe-b));
  background: var(--bg-card);
  border: 1px solid #303a4e;
  border-radius: 20px 20px 0 0;
  animation: rise .18s ease-out;
}
@keyframes rise { from { transform: translateY(18px); opacity: .4; } }

.sheet-close {
  position: absolute;
  top: 12px; right: 12px;
  width: 34px; height: 34px;
  font-size: 20px;
  color: var(--fg);
  background: var(--bg-card-2);
  border: 1px solid #333c50;
  border-radius: 9px;
  cursor: pointer;
}
.sheet h2 { margin: 2px 0 16px; font-size: 17px; }

.sheet-surface {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.9;
  margin: 4px 44px 14px 0;
}
.sheet-rows { margin: 0 0 16px; }
.sheet-rows div {
  display: flex;
  gap: 12px;
  padding: 9px 0;
  border-top: 1px solid #2b3244;
  font-size: 15.5px;
}
.sheet-rows dt { flex: none; width: 6.6em; color: var(--fg-dim); font-size: 12.5px; padding-top: 2px; }
.sheet-rows dd { margin: 0; word-break: break-word; }
.sheet-rows .ko dd { color: var(--ko); }
.sheet-rows .waiting dd { color: var(--fg-dim); font-style: italic; }
.sheet-rows .romaji dd { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.setting {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--fg-dim);
}
.setting.row { flex-direction: row; align-items: center; justify-content: space-between; }
.setting select {
  padding: 10px 12px;
  font-size: 15px;
  color: var(--fg);
  background: var(--bg-card-2);
  border: 1px solid #333c50;
  border-radius: 10px;
}
.setting input[type="checkbox"] { width: 22px; height: 22px; accent-color: var(--accent); }

.hint {
  margin: 4px 0 0;
  padding: 11px 13px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--fg);
  background: var(--bg-card-2);
  border: 1px solid #333c50;
  border-radius: 10px;
}
.hint strong { color: var(--accent); }
.ios-share {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--accent);
}

.btn:disabled { opacity: .6; }

.note { font-size: 12.5px; line-height: 1.75; color: var(--fg-dim); margin: 18px 0 0; }

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fa;
    --bg-card: #ffffff;
    --bg-card-2: #eef1f6;
    --fg: #14181f;
    --fg-dim: #5d6675;
    --accent: #1a6fd4;
    --accent-2: #128a55;
    --ko: #b45309;
  }
  .topbar { background: rgba(246, 247, 250, .93); border-bottom-color: #dde1e9; }
  .toggles { background: rgba(246, 247, 250, .96); }
  .icon-btn, .chip, .btn.ghost, .speak, .sheet-close, .setting select {
    border-color: #d7dce6;
  }
  .line-card, .pick, .status { border-color: #e0e4ec; }
  .aux { border-top-color: #e3e7ef; }
  .shoot { background: linear-gradient(160deg, #e6eefc, #f4f6fb); border-color: #cfdcf3; }
  .jp.wakachi .tok { border-bottom-color: #c9d2e2; }
  .sheet-rows div { border-top-color: #e3e7ef; }
  .error { background: #fff1f1; border-color: #f2c4c4; color: #a02323; }
  .aux.hangul .val { color: #1a4d8f; }
  rt { color: #0f7a4a; }
}