:root {
  --bg: #f6f6f4;
  --ink: #111;
  --muted: #8a8a86;
  --line: #e7e6e1;
  --card: #ffffff;
  --accent: #111;
  --radius: 22px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { opacity: .65; }

/* ---------- NAV ---------- */
.nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 40px;
  max-width: 1200px; margin: 0 auto;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.logo .mark { font-size: 20px; }
.logo .name { letter-spacing: -0.01em; }
.links { display: flex; gap: 28px; font-size: 14px; color: var(--muted); }

/* ---------- HERO ---------- */
.hero {
  max-width: 1100px;
  margin: 40px auto 80px;
  padding: 72px 56px;
  background: var(--card);
  border-radius: 32px;
  box-shadow: 0 1px 0 var(--line);
  position: relative;
  overflow: hidden;
}
.hero h1 {
  font-size: clamp(56px, 9vw, 128px);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0 0 56px;
}
.hero .word { display: block; }
.hero .word.light { font-weight: 300; color: #1a1a1a; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 14px 26px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 15px;
  color: var(--ink);
}

/* ---------- HOW ---------- */
.how { max-width: 1100px; margin: 0 auto 100px; padding: 0 16px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.card-mini {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 26px;
  border: 1px solid var(--line);
}
.card-mini .step {
  font-size: 12px; letter-spacing: .1em;
  color: var(--muted); margin-bottom: 18px;
}
.card-mini h3 {
  margin: 0 0 8px; font-size: 20px;
  letter-spacing: -0.01em; font-weight: 600;
}
.card-mini p { margin: 0; color: #4a4a47; font-size: 14.5px; }

/* ---------- TRY ---------- */
.try { max-width: 1100px; margin: 0 auto 80px; padding: 0 16px; }
.try h2 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700; letter-spacing: -0.03em;
  margin: 0 0 28px;
}
.panel {
  background: var(--card);
  border-radius: 28px;
  padding: 36px;
  border: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 20px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field > span {
  font-size: 13px; color: var(--muted);
  letter-spacing: .02em; text-transform: lowercase;
}
.level-dropdown { position: relative; }
.level-trigger {
  width: 100%; padding: 14px 16px;
  background: #fafaf8; border: 1px solid var(--line); border-radius: 14px;
  font: inherit; color: var(--ink); outline: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  transition: border-color .15s;
}
.level-trigger:hover, .level-trigger.open { border-color: var(--ink); }
.level-trigger svg { flex-shrink: 0; transition: transform .15s; }
.level-trigger.open svg { transform: rotate(180deg); }
.level-panel {
  display: none; position: absolute; z-index: 10; top: calc(100% + 4px); left: 0; right: 0;
  background: #fafaf8; border: 1px solid var(--ink); border-radius: 14px;
  padding: 10px 16px; flex-direction: column; gap: 8px;
}
.level-panel.open { display: flex; }
.level-panel label { display: flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer; }
.level-panel input[type="checkbox"] { width: 15px; height: 15px; cursor: pointer; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .row { grid-template-columns: 1fr; } }

textarea, input[type=text], input[type=number], select {
  width: 100%;
  padding: 14px 16px;
  background: #fafaf8;
  border: 1px solid var(--line);
  border-radius: 14px;
  font: inherit; color: var(--ink);
  outline: none;
  transition: border-color .15s;
}
textarea:focus, input:focus, select:focus { border-color: var(--ink); }
textarea { resize: vertical; min-height: 160px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; }

input[type=file] { padding: 10px 0; }

input[type=range] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px;
  background: var(--line); border-radius: 999px;
  outline: none; padding: 0; margin: 8px 0;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--ink); cursor: pointer; border: none;
}
input[type=range]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--ink); cursor: pointer; border: none;
}
output { font-weight: 600; color: var(--ink); }

.checkbox {
  display: flex; align-items: center; gap: 10px;
  font-size: 14.5px;
}
.checkbox input { accent-color: var(--ink); }

.actions { display: flex; gap: 12px; margin-top: 8px; flex-wrap: wrap; }
button {
  font: inherit;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: transform .05s, background .15s, color .15s;
}
button:active { transform: scale(.98); }
.primary { background: var(--ink); color: #fff; }
.primary:hover { background: #000; }
.ghost { background: transparent; color: var(--ink); }
.ghost:hover { background: var(--ink); color: #fff; }

/* ---------- RESULT ---------- */
.result {
  margin-top: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px;
  overflow-x: auto;
}
.result-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; gap: 12px;
}
.result-toolbar .count { font-size: 14px; color: var(--muted); margin: 0; }
.result-toolbar button { padding: 8px 20px; font-size: 13px; white-space: nowrap; }
.result .count { font-size: 14px; color: var(--muted); margin-bottom: 12px; }
.result table { width: 100%; border-collapse: collapse; font-size: 14px; }
.result th, .result td {
  text-align: left; padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.result th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
.result td.chk, .result th.chk { width: 32px; padding: 10px 4px 10px 12px; }
.result td.chk input[type=checkbox] { width: 15px; height: 15px; cursor: pointer; accent-color: var(--ink); }
.result td.term { font-weight: 600; }
.result td.pos { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.result td.ctx { color: #555; max-width: 380px; }
.result tr.phrase td.term::before { content: "✻ "; color: var(--muted); }

.tabs { display: flex; gap: 4px; margin: 12px 0 16px; border-bottom: 1px solid var(--line); }
.tab {
  background: transparent;
  border: none;
  padding: 10px 16px;
  font: inherit;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  border-radius: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.tab:hover { color: var(--ink); background: transparent; }
.tab.active { color: var(--ink); border-bottom-color: var(--ink); }
.tab .badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  background: var(--bg);
  color: var(--muted);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
}
.tab.active .badge { background: var(--ink); color: #fff; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.empty { padding: 24px; text-align: center; color: var(--muted); font-size: 14px; }

.src-badge {
  display: inline-block; padding: 1px 6px; border-radius: 4px;
  background: #f0f0f0; color: #555; font-size: 11px;
  vertical-align: middle; margin-left: 4px; white-space: nowrap;
}
.def-meta { display: flex; align-items: center; gap: 4px; margin-top: 4px; justify-content: space-between; }
.wrong-btn {
  display: inline-block; padding: 1px 7px; border-radius: 4px;
  background: transparent; border: 1px solid #ccc; color: var(--muted);
  font-size: 11px; cursor: pointer; vertical-align: middle;
}
.wrong-btn:hover { border-color: #888; color: var(--ink); }
.alt-row td { background: #fafafa; padding: 8px 12px; }
.alt-list { display: flex; flex-direction: column; gap: 6px; }
.alt-item { font-size: 13px; }
.alt-item .src-badge { background: #e8eaf0; }
.alt-def { margin-left: 4px; }
.alt-ex { color: var(--muted); }

.loading, .error, .ok { padding: 10px 4px; font-size: 14.5px; }
.error { color: #b00020; }
.ok { color: #0a7a3b; }

/* ---------- FOOT ---------- */
.foot {
  max-width: 1100px; margin: 0 auto; padding: 28px 40px 60px;
  color: var(--muted); font-size: 13px;
}