/* Nandoku Trainer — 藍色 ai-iro, indigo. Built on kanji.css (kj-* components). */
:root {
  --page-color: #165e83;
  --page-color-soft: rgba(22, 94, 131, 0.10);
  --nd-pop: 'Nandoku Pop', 'Hiragino Maru Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  --nd-kanji: #f7ee8e;        /* the game's yellow kanji */
  --nd-outline: #17130f;
}

.nd-pop { font-family: var(--nd-pop) !important; font-weight: 400; }

/* ---------------------------------------------------------------- level progress */
.nd-levels { display: flex; flex-direction: column; gap: 16px; max-width: 720px; }
.nd-level-head { display: flex; justify-content: space-between; align-items: baseline; gap: 6px 16px; flex-wrap: wrap; margin-bottom: 6px; }
.nd-level-name { font-family: var(--font-mincho); font-size: 1.15rem; color: var(--ink); }
.nd-level-nums { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.nd-level-bar { display: flex; height: 14px; border-radius: 999px; overflow: hidden; background: var(--surface); border: 1px solid var(--border); }
.nd-level-bar > span { min-width: 0; flex-basis: 0; }
.nd-level-bar > .m4 { min-width: 3px; }
.nd-level-bar > .nd-rest { background: transparent; }

/* ---------------------------------------------------------------- the word, game style */
/* A little 漢字でGO! scene: sky, clouds, a road into the distance, and the
   word in heavy pop letters, yellow kanji and white kana with a thick outline */
.nd-board {
  position: relative; flex-shrink: 0; width: 100%; max-width: 620px;
  padding: clamp(22px, calc(var(--vvh, 100vh) * 0.05), 48px) 14px clamp(30px, calc(var(--vvh, 100vh) * 0.07), 64px);
  border-radius: 18px; overflow: hidden; isolation: isolate;
  background:
    radial-gradient(60px 22px at 18% 30%, rgba(255,255,255,.85) 60%, transparent 62%),
    radial-gradient(44px 18px at 25% 26%, rgba(255,255,255,.85) 60%, transparent 62%),
    radial-gradient(70px 24px at 80% 22%, rgba(255,255,255,.8) 60%, transparent 62%),
    radial-gradient(40px 16px at 72% 27%, rgba(255,255,255,.8) 60%, transparent 62%),
    linear-gradient(#5f8fef 0%, #8db6f6 62%, #b8d4f8 72%, #6fbf55 72%, #4f9f3d 100%);
  box-shadow: var(--shadow-md);
}
/* the road */
.nd-board::before {
  content: ''; position: absolute; z-index: -1; left: 0; right: 0; bottom: 0; height: 28%;
  background: linear-gradient(#e2d2ae, #cdb88c);
  clip-path: polygon(47% 0, 53% 0, 78% 100%, 22% 100%);
}
/* palm-ish trees on both sides, very simple */
.nd-board::after {
  content: ''; position: absolute; z-index: -1; inset: 0; pointer-events: none;
  background:
    radial-gradient(90px 120px at -2% 70%, #7cc05c 60%, transparent 62%),
    radial-gradient(90px 120px at 102% 70%, #7cc05c 60%, transparent 62%),
    radial-gradient(60px 80px at 8% 78%, #5fa847 60%, transparent 62%),
    radial-gradient(60px 80px at 92% 78%, #5fa847 60%, transparent 62%);
}
.nd-term {
  font-family: var(--nd-pop); font-weight: 400; line-height: 1.2; letter-spacing: 0.01em;
  color: #fff; -webkit-text-stroke: 0.15em var(--nd-outline); paint-order: stroke fill;
  text-shadow: 0 0.05em 0 var(--nd-outline);
  font-size: min(clamp(64px, calc(var(--vvh, 100vh) * 0.15), 136px), 26vw);
  overflow-wrap: anywhere; transition: opacity .15s;
}
.nd-term .k { color: var(--nd-kanji); }
.nd-term[data-len="3"] { font-size: min(clamp(56px, calc(var(--vvh, 100vh) * 0.13), 120px), 22vw); }
.nd-term[data-len="4"] { font-size: min(clamp(48px, calc(var(--vvh, 100vh) * 0.115), 108px), 18.5vw); }
.nd-term[data-len="5"] { font-size: min(clamp(42px, calc(var(--vvh, 100vh) * 0.1), 94px), 15vw); }
.nd-term[data-len="6"] { font-size: min(clamp(38px, calc(var(--vvh, 100vh) * 0.09), 82px), 12.8vw); }
.nd-term[data-len="7"], .nd-term[data-len="8"] { font-size: min(clamp(34px, calc(var(--vvh, 100vh) * 0.08), 70px), 10.8vw); }
.nd-term.is-loading { opacity: 0; }

/* challenge timer: a thin bar across the top of the board */
.nd-timer { position: absolute; left: 0; right: 0; top: 0; height: 7px; background: rgba(23, 19, 15, .25); }
.nd-timer > div { height: 100%; width: 100%; background: #f7ee8e; }
.nd-timer > div.is-low { background: var(--kj-no); }

.nd-lives { color: var(--kj-no); letter-spacing: 2px; }
.nd-streak { color: var(--page-color); font-weight: 500; }
.nd-streak:empty { display: none; }

/* ---------------------------------------------------------------- answering */
.nd-typed { max-width: 460px; }
.nd-giveup { font-size: 14px; color: var(--muted) !important; }
.nd-choices { grid-template-columns: 1fr; max-width: 560px; }
.nd-choices .kj-choice { font-family: 'Noto Sans JP', sans-serif; font-size: 0.98rem; line-height: 1.5; }

/* ---------------------------------------------------------------- answer card */
.nd-answer {
  width: 100%; display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 12px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
}
.nd-answer-term { font-size: 1.9rem; line-height: 1.2; color: var(--ink); background: none; border: 0; padding: 0; cursor: pointer; }
.nd-answer-reading { margin: 0; font: 500 1.2rem 'Noto Sans JP', sans-serif; color: var(--page-color); }
.nd-answer-meaning { margin: 2px 0 0; font: 400 0.98rem/1.55 'Noto Sans JP', sans-serif; color: var(--ink); max-width: 40ch; }
.nd-answer-note { margin: 0; font: 400 0.85rem/1.5 'Noto Sans JP', sans-serif; color: var(--muted); max-width: 44ch; }
.nd-answer-vars { margin: 2px 0 0; font-size: 0.85rem; color: var(--muted); }
.nd-answer-vars .nd-pop { font-size: 1.1rem; color: var(--ink-soft); }
.nd-override { margin: 0; font-size: 0.9rem; color: var(--muted); display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: center; }
.nd-override .btn-link { min-height: 36px; padding: 6px 0; font-size: 0.9rem; }
.nd-override .btn-link::after { bottom: 6px; }

/* ---------------------------------------------------------------- detail + dashboard */
#detail-overlay { z-index: 250; }   /* opens over the session summary */
.nd-detail-term { font-size: clamp(3rem, 12vw, 4.6rem); line-height: 1.15; color: var(--ink); margin: 0; overflow-wrap: anywhere; }
.nd-detail-vars { font-size: 1.6rem; line-height: 1.5; color: var(--ink); margin: 0; overflow-wrap: anywhere; }
#detail-body { display: flex; flex-direction: column; gap: 10px; }
#detail-body .eyebrow { margin-bottom: 0; align-self: flex-start; margin-right: 44px; }
.nd .kj-trouble-item, .kj-summary .kj-trouble-item { font-size: 1.25rem; }
.nd #level-picker { margin-bottom: 4px; }

/* ---------------------------------------------------------------- compact (keyboard open) */
body.kj-compact .nd-board { padding: 12px 14px 18px; }
body.kj-compact .nd-term { font-size: min(clamp(40px, 16vw, 96px), calc(var(--vvh, 100vh) * 0.13)); }
body.kj-compact .nd-term[data-len="5"], body.kj-compact .nd-term[data-len="6"],
body.kj-compact .nd-term[data-len="7"], body.kj-compact .nd-term[data-len="8"] { font-size: min(11vw, calc(var(--vvh, 100vh) * 0.09)); }
body.kj-compact .nd-answer { padding: 8px 12px; }
body.kj-compact .nd-answer-term { font-size: 1.5rem; }
body.kj-compact .nd-answer-note { display: none; }

@media (max-width: 640px) {
  .nd-choices { grid-template-columns: 1fr; }
}
.nd-typed-was { color: var(--ink); }
.nd-of { margin: 0; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.nd-of .btn-link { font-size: 1.3rem; min-height: 40px; padding: 4px 0; }
.nd-hint {
  position: absolute; right: 12px; bottom: 10px; padding: 3px 12px; border-radius: 999px;
  background: rgba(23, 19, 15, .6); color: #fff; font: 500 14px 'Noto Sans JP', sans-serif;
}
.nd-hint:empty { display: none; }
.nd-tags { justify-content: center; margin: 2px 0 0; }