/* Text is black. Orange (Claude color) is only for headings/categories and buttons. Background white. */
:root {
  --o: #D97757;
  --o-10: rgba(217, 119, 87, 0.10);
  --o-20: rgba(217, 119, 87, 0.22);
  --o-35: rgba(217, 119, 87, 0.40);
  --ink: #111111;
  --ink-2: rgba(17, 17, 17, 0.62);   /* secondary text: still black, lighter */
  --line: rgba(17, 17, 17, 0.10);
  --w: #FFFFFF;
  --r: 14px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--w); color: var(--ink); }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }

.wrap { max-width: 640px; margin: 0 auto; padding-inline: 18px; }
.center { text-align: center; }
.muted { color: var(--ink-2); }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--o); outline-offset: 2px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: var(--w);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top, 0px);
}
.top h1 { margin: 0; padding: 16px 0 8px; font-size: 20px; font-weight: 800; letter-spacing: -0.02em; color: var(--o); }
.top h1 span { font-weight: 500; color: var(--ink); }
.tabs { display: flex; gap: 2px; }
.tab {
  flex: 1; background: none; border: 0; padding: 10px 0 12px;
  font-weight: 600; color: var(--ink-2); font-size: 15px;
  border-bottom: 2.5px solid transparent; white-space: nowrap;
}
.tab.active { color: var(--o); font-weight: 800; border-bottom-color: var(--o); }
.badge {
  display: inline-block; min-width: 19px; padding: 0 5px; margin-left: 2px;
  border-radius: 10px; background: var(--o); color: var(--w);
  font-size: 11px; font-weight: 700; line-height: 19px; vertical-align: 1px;
}

main { padding-block: 22px 60px; }

/* Section headings (= 목차/종류): bold orange */
h2 { font-size: 16px; font-weight: 800; margin: 28px 0 10px; color: var(--o); }
h2:first-child { margin-top: 0; }
h2 .muted { font-size: 13px; font-weight: 500; }

.card { border: 1.5px solid var(--line); border-radius: var(--r); padding: 16px; background: var(--w); }
.card-title { font-weight: 800; color: var(--o); margin-bottom: 10px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1.5px solid var(--o); background: var(--w); color: var(--ink);
  border-radius: 12px; padding: 12px 18px; font-weight: 700;
  transition: background .15s;
}
.btn:hover { background: var(--o-10); }
.btn.primary { background: var(--o); color: var(--w); }
.btn.primary:hover { filter: brightness(1.05); background: var(--o); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .4; cursor: default; }
.btn.small { padding: 7px 12px; font-size: 14px; border-radius: 10px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.row > .btn { flex: 1; }

/* Choices */
.choices { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.choice { border: 1.5px solid var(--line); background: var(--w); border-radius: 12px; padding: 12px; text-align: left; color: var(--ink); }
.choice strong { display: block; font-size: 15px; }
.choice small { color: var(--ink-2); font-size: 13px; }
.choice.on { border-color: var(--o); background: var(--o-10); }
select.choice { width: 100%; appearance: none; -webkit-appearance: none; font-weight: 600; }

/* Speaker */
.say {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; flex: none;
  border: 0; border-radius: 50%; background: var(--o-10); color: var(--o);
  vertical-align: middle; padding: 0;
}
.say:hover { background: var(--o-20); }
.say svg { width: 15px; height: 15px; }
.say.big { width: 38px; height: 38px; }
.say.big svg { width: 20px; height: 20px; }

/* Quiz */
.progress { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; font-weight: 700; font-size: 14px; }
.bar { flex: 1; height: 6px; border-radius: 3px; background: var(--o-10); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--o); transition: width .25s; }
.prompt { text-align: center; padding: 34px 12px 30px; border: 1.5px solid var(--line); border-radius: var(--r); margin-bottom: 14px; }
.prompt .label { font-size: 13px; color: var(--ink-2); margin-bottom: 8px; }
.prompt .word { font-size: 30px; font-weight: 800; letter-spacing: -0.01em; word-break: keep-all; display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center; }
.answer, .field {
  width: 100%; padding: 15px 16px; font-size: 18px;
  border: 1.5px solid var(--line); border-radius: 12px; outline: none; color: var(--ink); background: var(--w);
}
.field { font-size: 15px; padding: 9px 11px; border-radius: 10px; }
.answer:focus, .field:focus { border-color: var(--o); box-shadow: 0 0 0 3px var(--o-10); }
.answer::placeholder, .field::placeholder { color: var(--ink-2); opacity: .7; }
.feedback { margin-top: 14px; border-radius: 12px; padding: 14px 16px; }
.feedback.ok { background: var(--o-10); border: 1.5px solid var(--o); }
.feedback.no { border: 1.5px dashed var(--ink-2); }
.feedback .head { font-weight: 800; font-size: 17px; }
.feedback.ok .head { color: var(--o); }
.feedback .detail { margin-top: 4px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.linkbtn { background: none; border: 0; padding: 0; color: inherit; text-decoration: underline; font-size: 14px; }

/* Matching */
.match { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.match .col { display: grid; gap: 10px; align-content: start; }
.tile {
  cursor: pointer; user-select: none; -webkit-user-select: none;
  min-height: 58px; padding: 10px 12px; border-radius: 12px;
  border: 1.5px solid var(--line); background: var(--w); color: var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
  text-align: left; font-weight: 600; word-break: keep-all;
  transition: opacity .25s, transform .15s, background .15s;
}
.tile.sel { border-color: var(--o); background: var(--o-10); }
.tile.done { opacity: 0; pointer-events: none; transform: scale(.96); }
.tile.bad { animation: shake .35s; border-color: var(--ink-2); border-style: dashed; }
@keyframes shake { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

/* Results */
.score { text-align: center; padding: 26px 0 8px; }
.score .num { font-size: 46px; font-weight: 800; color: var(--o); line-height: 1.1; }

/* Lists */
.list { border: 1.5px solid var(--line); border-radius: var(--r); overflow: hidden; }
.item { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-top: 1px solid var(--line); }
.item:first-child { border-top: 0; }
.item .fr { font-weight: 700; display: flex; align-items: center; gap: 8px; min-width: 0; flex: 1 1 50%; }
.item .ko { flex: 1 1 40%; min-width: 0; }
.item .meta { font-size: 12px; color: var(--ink-2); white-space: nowrap; }
.item .x { border: 0; background: none; color: var(--ink-2); font-size: 18px; line-height: 1; padding: 4px 6px; border-radius: 8px; }
.item .x:hover { background: var(--o-10); color: var(--ink); }

/* Wordbook: date folder (목차) → category (종류) → words */
details.day { margin-bottom: 14px; }
details.day > summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; border-radius: var(--r); border: 1.5px solid var(--line);
}
details.day > summary::-webkit-details-marker { display: none; }
details.day > summary::after { content: "＋"; font-weight: 800; color: var(--o); margin-left: 4px; }
details.day[open] > summary { border-color: var(--o); border-bottom-left-radius: 0; border-bottom-right-radius: 0; background: var(--o-10); }
details.day[open] > summary::after { content: "－"; }
details.day .body { border: 1.5px solid var(--o); border-top: 0; border-radius: 0 0 var(--r) var(--r); padding: 4px 0 10px; }
.day-title { display: flex; flex-direction: column; min-width: 0; }
.day-title .name { font-size: 17px; font-weight: 800; color: var(--o); }
.day-title .count { font-weight: 500; font-size: 13px; color: var(--ink-2); margin-left: 8px; }
.day-title .sub { font-size: 12px; color: var(--ink-2); }
.rename { margin-left: auto; border: 0; background: none; color: var(--ink-2); font-size: 17px; padding: 2px 8px; border-radius: 8px; }
.rename:hover { background: var(--o-10); color: var(--ink); }
.rename-form { display: flex; gap: 8px; width: 100%; align-items: center; }
.rename-form .field { flex: 1; min-width: 0; }
details.day > summary:has(.rename-form)::after { display: none; }

.group { margin: 14px 14px 0; }
.group-title {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 0 8px; border-bottom: 2px solid var(--o);
  font-size: 16px; font-weight: 800; color: var(--o);
}
.group .item { padding-inline: 4px; }
.group .item:first-child { border-top: 0; }

.search { width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 12px; outline: none; margin-bottom: 14px; color: var(--ink); }
.search:focus { border-color: var(--o); }

.empty { text-align: center; padding: 40px 10px; border: 1.5px dashed var(--line); border-radius: var(--r); color: var(--ink-2); }
.empty strong { display: block; color: var(--o); font-size: 17px; margin-bottom: 4px; }

/* Add words */
.status { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-2); margin-bottom: 14px; }
.dot { width: 9px; height: 9px; border-radius: 50%; border: 2px solid var(--o); flex: none; }
.dot.on { background: var(--o); }
.drop {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  padding: 36px 16px; border: 2px dashed var(--o-35); border-radius: var(--r); text-align: center; cursor: pointer;
  transition: background .15s;
}
.drop:hover, .drop.over { background: var(--o-10); border-color: var(--o); }
.drop strong { color: var(--o); font-size: 17px; }
.drop small { color: var(--ink-2); }
.preview { max-height: 220px; max-width: 100%; border-radius: 10px; display: block; margin: 0 auto 14px; }
.spinner { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--o-20); border-top-color: var(--o); animation: spin .9s linear infinite; margin: 8px auto 12px; }
@keyframes spin { to { transform: rotate(360deg); } }
.edit-table { display: grid; gap: 8px; }
.edit-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 6px; align-items: center; }
.edit-row.cat { margin-top: 10px; padding-top: 10px; border-top: 2px solid var(--o); }
.edit-row.cat:first-child { margin-top: 0; }
.edit-row.cat .field { font-weight: 800; color: var(--o); }
.edit-row .tools { display: flex; gap: 2px; }
.icon-btn { border: 0; background: none; color: var(--ink-2); font-size: 14px; padding: 6px 7px; border-radius: 8px; font-weight: 700; white-space: nowrap; }
.icon-btn:hover { background: var(--o-10); color: var(--ink); }
.icon-btn.on { color: var(--o); }
.legend { font-size: 13px; color: var(--ink-2); margin: -2px 0 12px; }

.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%);
  background: var(--ink); color: var(--w); padding: 10px 16px; border-radius: 12px; font-weight: 600; font-size: 14px;
  z-index: 50; max-width: calc(100% - 32px);
}

@media (max-width: 420px) {
  .prompt .word { font-size: 26px; }
  .tab { font-size: 14px; }
  .item { flex-wrap: wrap; }
  .item .ko { flex-basis: calc(100% - 40px); padding-left: 36px; }
  .edit-row { grid-template-columns: 1fr auto; }
  .edit-row .tools { grid-row: 1 / span 2; grid-column: 2; flex-direction: column; }
}