/* =====================================================
   텍스트 인코더·디코더 전용 CSS
   위치: web-dev/text-encoder/style_text_encoder.css
   ===================================================== */
:root {
  --bg: #f6f8ff;
  --card: #ffffff;
  --ink: #0b1220;
  --muted: #5a6b87;
  --line: #e6ecff;
  --blue: #2563eb;
  --blue2: #1d4ed8;
  --green: #16a34a;
  --shadow: 0 10px 30px rgba(12,24,60,.10);
  --radius: 16px;
  --radius2: 12px;
  --focus: 0 0 0 4px rgba(37,99,235,.18);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0 }
body {
  font-family: 'Pretendard', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 30% -20%, rgba(37,99,235,.14), transparent 60%),
    radial-gradient(1200px 600px at 80% 0%, rgba(59,130,246,.08), transparent 60%),
    var(--bg);
}

/* ── 레이아웃 ── */
.wrap { max-width: 100%; padding: 0 0 60px }
.top  { padding: 20px 0 16px }
.brand { display: flex; gap: 14px; align-items: center }
.logo {
  width: 44px; height: 44px; flex: 0 0 auto;
  display: grid; place-items: center; border-radius: 14px;
  background: linear-gradient(135deg, rgba(37,99,235,.12), rgba(59,130,246,.18));
  border: 1px solid rgba(37,99,235,.18);
}
.logo span { font-size: 22px }
h1 { margin: 0; font-size: 22px; font-weight: 700; letter-spacing: -.3px }
.sub { margin: 5px 0 0; color: var(--muted); font-size: 13px; line-height: 1.45 }

/* ── 탭 ── */
.tab-row {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.tab-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  padding: 9px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700; font-size: 13px; font-family: inherit;
  transition: border-color .1s, background .1s, color .1s;
}
.tab-btn:hover { border-color: rgba(37,99,235,.4); color: var(--blue) }
.tab-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

/* ── 카드 ── */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 14px;
}
.card-h {
  display: flex; align-items: center;
  justify-content: space-between; gap: 12px;
  margin-bottom: 16px; flex-wrap: wrap;
}
.card-h h2 { margin: 0; font-size: 15px; font-weight: 800 }
.hint { color: var(--muted); font-size: 12px }

/* ── 인코더 2단 그리드 ── */
.enc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 720px) {
  .enc-grid { grid-template-columns: 1fr }
}
.enc-side { display: flex; flex-direction: column; gap: 8px }
.field-label {
  font-size: 12px; font-weight: 800; color: var(--muted);
  text-transform: uppercase; letter-spacing: .04em;
}

/* ── 텍스트에리어 ── */
.mono-area {
  width: 100%; border: 1px solid var(--line);
  border-radius: var(--radius2); padding: 12px 14px;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.6;
  color: var(--ink); background: #fafbff;
  resize: vertical; outline: none;
  transition: border-color .15s;
}
.mono-area:focus { border-color: rgba(37,99,235,.4); box-shadow: var(--focus); background: #fff }
.mono-area[readonly] { background: #f8faff; color: var(--muted) }

/* ── 버튼 ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 14px; border-radius: var(--radius2);
  border: 1px solid rgba(37,99,235,.25); background: #fff; color: var(--ink);
  font-weight: 700; font-size: 12.5px; cursor: pointer; font-family: inherit;
  white-space: nowrap; transition: border-color .1s, background .1s;
}
.btn:hover { border-color: rgba(37,99,235,.5) }
.btn:focus { outline: none; box-shadow: var(--focus) }
.btn.primary {
  background: linear-gradient(135deg, var(--blue), var(--blue2));
  color: #fff; border-color: transparent;
}
.btn.primary:hover { filter: brightness(1.08) }
.btn.ghost { background: #f0f4ff; border-color: rgba(37,99,235,.2); color: var(--blue2) }
.btn.ghost:hover { background: #e8eeff }
.btn-row {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
}

/* ── 파일 업로드 ── */
.file-input {
  border: 1px solid var(--line); border-radius: var(--radius2);
  padding: 8px 12px; font-size: 13px; font-family: inherit;
  background: #fff; cursor: pointer; flex: 1;
}
.file-input:focus { outline: none; box-shadow: var(--focus) }
.toggle-label {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--muted); cursor: pointer; white-space: nowrap;
}
.file-result { margin-top: 16px }
.file-result .muted { font-size: 11px; color: var(--muted) }

/* ── URL 라디오 ── */
.mode-row {
  display: flex; gap: 16px; flex-wrap: wrap;
}
.mode-label {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--muted); cursor: pointer;
}
.mode-label input[type="radio"] { accent-color: var(--blue) }

/* ── 텍스트 입력 ── */
.text-input {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--line); border-radius: var(--radius2);
  background: #fff; font-size: 13px; font-family: var(--mono);
  color: var(--ink); outline: none;
}
.text-input:focus { box-shadow: var(--focus); border-color: rgba(37,99,235,.35) }

/* ── 쿼리스트링 결과 ── */
.qs-result { margin-top: 14px }
.qs-table {
  width: 100%; border-collapse: collapse;
  font-size: 12.5px; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line);
}
.qs-table th {
  background: #f0f4ff; padding: 9px 12px;
  text-align: left; font-weight: 800; font-size: 11px;
  text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
  border-bottom: 1px solid var(--line);
}
.qs-table td {
  padding: 9px 12px; border-bottom: 1px solid #f0f4ff;
  vertical-align: top;
}
.qs-table tr:last-child td { border-bottom: none }
.qs-key { font-weight: 800; color: var(--blue2); font-family: var(--mono) }
.qs-val { color: var(--ink) }
.qs-val.mono { font-family: var(--mono); color: var(--muted) }
.qs-empty { font-size: 13px; color: var(--muted); padding: 10px 0 }

/* ── HTML 엔티티 참조표 ── */
.entity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}
.entity-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px;
  background: #f8faff; border: 1px solid var(--line);
  border-radius: 10px; font-size: 12.5px;
}
.entity-char { font-size: 16px; min-width: 24px; text-align: center }
.entity-code { font-family: var(--mono); color: var(--blue2); font-size: 12px }
.entity-name { color: var(--muted); font-size: 11px }
.entity-copy {
  border: none; background: none; cursor: pointer;
  color: var(--muted); font-size: 11px; padding: 3px 6px;
  border-radius: 6px; transition: background .1s;
}
.entity-copy:hover { background: #e8eeff; color: var(--blue2) }

/* ── 사용 안내 섹션 공통 ── */
.guide-section {
  margin-top: 10px;
  background: rgba(246,248,255,.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.guide-section h2 {
  font-size: 15px; font-weight: 800; margin: 0 0 10px; color: var(--ink);
}
.guide-section h2:not(:first-child) { margin-top: 18px }
.guide-steps, .guide-features, .guide-usecase {
  margin: 0; padding-left: 18px;
  color: var(--muted); font-size: 13px; line-height: 1.8;
}
.guide-steps li, .guide-features li, .guide-usecase li { margin-bottom: 4px }
.guide-steps strong, .guide-features strong { color: var(--ink) }
.guide-privacy {
  margin-top: 16px;
  background: #eff6ff; border: 1px solid rgba(37,99,235,.22);
  border-radius: 12px; padding: 12px 14px;
  font-size: 12px; color: #1e40af; line-height: 1.55;
}

/* ── 유틸 ── */
.hidden { display: none !important }
.muted  { color: var(--muted) }
.row-flex { display: flex; align-items: center; gap: 10px; flex-wrap: wrap }

/* ── 토스트 ── */
#toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #0b1220; color: #fff; padding: 10px 18px;
  border-radius: 999px; font-size: 13px; font-weight: 700;
  opacity: 0; pointer-events: none; z-index: 9999;
  transition: opacity .2s, transform .2s; white-space: nowrap;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0) }