:root {
  --bg: #f7f6f2;
  --card: #ffffff;
  --ink: #2b2b2b;
  --sub: #777;
  --accent: #2f6fed;
  --accent-soft: #e8effd;
  --ok: #1d9e6f;
  --ok-soft: #e2f5ee;
  --bad: #d64545;
  --bad-soft: #fceaea;
  --line: #e5e2da;
  --radius: 14px;
  font-size: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
  background: var(--bg);
  color: var(--ink);
  max-width: 760px;
  margin: 0 auto;
  padding: 0 14px 60px;
}

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 4px 10px;
}
.topbar h1 { font-size: 1.25rem; }
.topbar h1 a { color: inherit; text-decoration: none; }
.topbar h1 a:hover { color: var(--accent); }
.topbar h1 a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
.topbar small { color: var(--sub); font-weight: 400; font-size: .8rem; margin-left: 6px; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.streak {
  background: var(--card); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 20px; font-weight: 600; font-size: .9rem;
}
.account-badge {
  max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  background: var(--accent-soft); color: var(--accent); border: 1px solid #c9d8fb;
  padding: 6px 10px; border-radius: 20px; font: inherit; font-weight: 700; font-size: .85rem;
  cursor: pointer;
}
.account-badge.signed-in { background: var(--ok-soft); color: var(--ok); border-color: #c5eadf; }

.tabs {
  display: flex; gap: 4px; overflow-x: auto;
  border-bottom: 2px solid var(--line); margin-bottom: 16px;
}
.tabs a {
  padding: 10px 14px; text-decoration: none; color: var(--sub);
  font-weight: 600; font-size: .95rem; white-space: nowrap;
  border-bottom: 3px solid transparent; margin-bottom: -2px;
}
.tabs a.active { color: var(--accent); border-bottom-color: var(--accent); }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin-bottom: 14px;
}
.card h2 { font-size: 1.05rem; margin-bottom: 10px; }
.card h3 { font-size: .95rem; margin: 12px 0 6px; }
.muted { color: var(--sub); font-size: .88rem; line-height: 1.5; }

.tile-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.tile {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 16px; cursor: pointer; text-align: left; font: inherit;
  transition: transform .06s, border-color .1s;
}
.tile:hover { border-color: var(--accent); transform: translateY(-2px); }
.tile .t-icon { font-size: 1.5rem; display: block; margin-bottom: 8px; }
.tile .t-name { font-weight: 700; }
.tile .t-desc { color: var(--sub); font-size: .8rem; margin-top: 4px; display: block; }

button.btn, a.btn {
  display: inline-block; background: var(--accent); color: #fff; border: none;
  padding: 10px 18px; border-radius: 10px; font-weight: 700; font-size: .95rem;
  cursor: pointer; text-decoration: none; font-family: inherit;
}
button.btn.secondary, a.btn.secondary { background: var(--card); color: var(--accent); border: 1px solid var(--accent); }
button.btn.ghost { background: transparent; color: var(--sub); border: 1px solid var(--line); }
button.btn:disabled { opacity: .5; cursor: default; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

/* ── 퀴즈 ── */
.quiz-progress { display: flex; justify-content: space-between; color: var(--sub); font-size: .85rem; margin-bottom: 10px; }
.quiz-q { font-size: 1.15rem; font-weight: 700; line-height: 1.6; margin-bottom: 6px; }
.quiz-hint { color: var(--sub); font-size: .88rem; margin-bottom: 14px; }
.choices { display: grid; gap: 8px; }
.choice {
  text-align: left; padding: 12px 14px; border-radius: 10px; cursor: pointer;
  border: 1.5px solid var(--line); background: var(--card); font: inherit; font-size: 1rem;
}
.choice:hover { border-color: var(--accent); }
.choice.correct { background: var(--ok-soft); border-color: var(--ok); font-weight: 700; }
.choice.wrong { background: var(--bad-soft); border-color: var(--bad); }
.choice:disabled { cursor: default; }
.hint-mask {
  font-family: Consolas, monospace; font-size: 1.25rem; letter-spacing: 2px;
  background: var(--accent-soft); border-radius: 10px; padding: 12px 14px; margin-bottom: 12px;
}
.hint-mask.revealed { background: var(--ok-soft); font-weight: 700; }
.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; font-size: 1.05rem; }
.feedback { margin-top: 14px; padding: 12px 14px; border-radius: 10px; line-height: 1.6; }
.feedback.ok { background: var(--ok-soft); }
.feedback.bad { background: var(--bad-soft); }
.result-big { font-size: 2.2rem; font-weight: 800; text-align: center; margin: 10px 0; }

/* ── 표현(패턴) 목록 ── */
.pattern-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin: 14px 0; }
.pattern-tabs { display: flex; gap: 7px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: thin; }
.pattern-tab {
  flex: 0 0 auto; border: 1px solid var(--line); border-radius: 999px; padding: 8px 11px;
  background: var(--card); color: var(--sub); font: inherit; font-size: .85rem; font-weight: 700; cursor: pointer;
}
.pattern-tab span { margin-left: 3px; font-size: .75rem; opacity: .7; }
.pattern-tab:hover { border-color: var(--accent); color: var(--accent); }
.pattern-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.pattern-toolbar > .btn { flex: 0 0 auto; padding: 9px 14px; }
.pattern-list { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.pattern-list-head { display: flex; align-items: center; justify-content: space-between; padding: 18px; border-bottom: 1px solid var(--line); }
.pattern-list-head h2 { font-size: 1.08rem; margin-top: 2px; }
.pattern-count { color: var(--sub); font-size: .85rem; font-weight: 700; }
.pattern-row { display: grid; grid-template-columns: 28px 1fr; gap: 10px; padding: 17px 18px; }
.pattern-row + .pattern-row { border-top: 1px solid var(--line); }
.pattern-number { color: #aaa; font-size: .82rem; font-weight: 700; padding-top: 3px; }
.pattern-content .p-text { font-size: 1.05rem; font-weight: 750; line-height: 1.45; }
.pattern-content .p-mean { color: var(--sub); margin: 3px 0 10px; font-size: .9rem; }
.pattern-content .p-ex { border-left: 3px solid #c9d8fb; padding: 7px 10px; color: #4d5870; font-size: .9rem; line-height: 1.5; }
.pattern-content .p-ex span { display: block; color: var(--accent); font-size: .68rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; margin-bottom: 2px; }
.stage-badge {
  display: inline-block; font-size: .72rem; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); border-radius: 6px; padding: 2px 8px; margin-bottom: 6px;
}

/* ── 주제 연습 ── */
.topic-cat { margin: 18px 0 8px; font-size: .85rem; font-weight: 700; color: var(--sub); text-transform: uppercase; letter-spacing: .04em; }
.q-item { padding: 12px 0; border-bottom: 1px solid var(--line); }
.q-item:last-child { border-bottom: none; }
.q-en { font-weight: 600; line-height: 1.5; margin-bottom: 8px; }
.answer-en { line-height: 1.9; font-size: 1.02rem; }
.answer-ko { color: var(--sub); line-height: 1.7; font-size: .92rem; margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line); }
.vocab-chip {
  display: inline-flex; align-items: center; gap: 6px; margin: 4px 6px 4px 0;
  background: var(--accent-soft); border-radius: 8px; padding: 6px 10px; font-size: .9rem;
}
.vocab-chip b { color: var(--accent); }
.vocab-chip button { border: none; background: transparent; cursor: pointer; font-size: .9rem; }

textarea, input[type=text], input[type=password], select {
  width: 100%; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 10px;
  font: inherit; font-size: .95rem; background: #fff;
}
textarea { min-height: 110px; resize: vertical; line-height: 1.6; }
label.fld { display: block; margin: 10px 0 4px; font-weight: 600; font-size: .88rem; }
.check-row {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 10px;
  color: var(--sub); font-size: .88rem; cursor: pointer;
}
.check-row input { width: auto; }

pre.prompt-box {
  background: #2d2d2d; color: #eee; padding: 14px; border-radius: 10px;
  white-space: pre-wrap; font-size: .82rem; line-height: 1.5; max-height: 260px; overflow: auto;
}

table.vtable { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.vtable th, table.vtable td { padding: 8px 6px; border-bottom: 1px solid var(--line); text-align: left; }
table.vtable th { color: var(--sub); font-size: .8rem; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 6px; font-size: .75rem; font-weight: 700; }
.badge.b1 { background: var(--bad-soft); color: var(--bad); }
.badge.b2 { background: #fdf3e0; color: #b07b1e; }
.badge.b3 { background: var(--ok-soft); color: var(--ok); }

.foot { text-align: center; color: #aaa; font-size: .75rem; margin-top: 40px; }
.notice { background: #fdf7e3; border: 1px solid #eadfa8; border-radius: 10px; padding: 10px 14px; font-size: .88rem; line-height: 1.6; margin: 10px 0; }
.notice.error { background: var(--bad-soft); border-color: #efc7c7; color: var(--bad); }

.admin-mode .topbar { justify-content: flex-start; }
.admin-login { max-width: 420px; margin: 30px auto 14px; }
.admin-table-wrap { overflow-x: auto; }
.admin-table th, .admin-table td { vertical-align: top; }
.admin-table input { min-width: 150px; }
.admin-row-actions { margin-top: 8px; }
.admin-row-actions .btn { padding: 7px 12px; font-size: .85rem; }

@media (max-width: 520px) {
  .topbar { align-items: flex-start; gap: 10px; }
  .top-actions { flex-shrink: 0; flex-direction: column; align-items: flex-end; gap: 6px; }
  .account-badge { max-width: 96px; }
  .admin-table { min-width: 640px; }
  .pattern-toolbar { display: block; }
  .pattern-toolbar > .btn { width: 100%; margin-top: 8px; }
  .pattern-row { padding: 15px 14px; grid-template-columns: 24px 1fr; }
}