:root {
  --bg: #0b0d10;
  --panel: #14181e;
  --panel-2: #171c23;
  --border: #232a33;
  --text: #e7ecf2;
  --dim: #9aa6b2;
  --mute: #5f6b78;
  --accent: #f5920b;
  --accent-2: #f7681f;
  --green: #2fbf71;
  --red: #ef4444;
  --radius: 12px;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}

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

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(900px 420px at 85% -8%, #1a140c 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 13, 16, 0.92);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 38px; height: 38px; border-radius: 11px;
  display: block; object-fit: cover;
  background: #0a0a0a;
  box-shadow: 0 6px 18px -6px rgba(227, 30, 36, 0.45);
}
.brand-wordmark {
  display: block; height: 26px; width: auto; max-width: 200px;
  object-fit: contain; margin: 0 0 2px;
}
.brand-text strong { display: block; font-size: 17px; letter-spacing: -0.02em; }
.brand-text span { color: var(--mute); font-size: 12px; }

.top-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.key-field { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--dim); }
.key-field input {
  width: 160px; height: 34px; border-radius: 8px;
  border: 1px solid var(--border); background: #101318; color: var(--text);
  padding: 0 10px;
}

.btn {
  height: 34px; padding: 0 14px; border-radius: 8px;
  border: 1px solid var(--border); background: #1c222b; color: var(--text);
  cursor: pointer; font-weight: 600; font-size: 13px;
}
.btn:hover { background: #242c37; }
.btn.accent {
  border-color: rgba(245, 146, 11, 0.45);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
}
.btn.accent:hover { filter: brightness(1.05); }
.btn.tiny { height: 28px; padding: 0 10px; font-size: 12px; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 18px 18px 48px; }

.stats.compact {
  grid-template-columns: repeat(4, 1fr) 1.6fr;
  margin-bottom: 12px;
}
.stats.compact .stat { padding: 10px 12px; }
.stats.compact .stat strong { font-size: 18px; }

.teach-hero { margin-bottom: 16px; }
.teach-hero h1 { font-size: 22px; letter-spacing: -0.03em; margin-bottom: 6px; }
.teach-hero p { color: var(--dim); font-size: 14px; max-width: 52ch; line-height: 1.45; }

.drop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  min-height: 140px;
  padding: 18px 18px;
  border: 1.5px dashed var(--border);
  border-radius: 14px;
  background: #101318;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover, .dropzone.drag {
  border-color: rgba(245, 146, 11, 0.65);
  background: #16120c;
}
.dropzone.filled {
  border-style: solid;
  border-color: rgba(47, 191, 113, 0.4);
}
.dropzone.slim {
  min-height: 72px;
  justify-content: center;
}
.dz-badge {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 6px;
}
.dz-badge.ori { background: rgba(47, 191, 113, 0.15); color: var(--green); }
.dz-badge.mod { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.dropzone strong { font-size: 15px; }
.dz-sub { color: var(--mute); font-size: 12px; }

.teach-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  margin-bottom: 14px;
}
.teach-meta label {
  display: flex; flex-direction: column; gap: 5px;
  font-size: 12px; color: var(--dim);
  min-width: 140px;
}
.teach-meta label.grow { flex: 1; min-width: 200px; }
.teach-meta input[type="text"],
.teach-meta input[type="file"],
.teach-meta input:not([type]) {
  border: 1px solid var(--border); border-radius: 8px;
  background: #101318; color: var(--text); padding: 9px 10px;
}
.teach-meta .check.tight {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
  margin-top: 0;
  min-width: auto;
  height: 38px;
}
.teach-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.btn.teach-main {
  height: 44px;
  padding: 0 22px;
  font-size: 15px;
  border-color: rgba(245, 146, 11, 0.45);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
}
.btn.ghost {
  background: transparent;
  color: var(--dim);
}
.btn.ghost:hover { color: var(--text); background: #1c222b; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.teach-result {
  border: 1px solid rgba(47, 191, 113, 0.35);
  background: linear-gradient(180deg, rgba(47, 191, 113, 0.08), transparent 60%), var(--panel-2);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 14px;
}
.teach-result.bad {
  border-color: rgba(239, 68, 68, 0.35);
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.08), transparent 60%), var(--panel-2);
}
.result-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.result-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--mute);
  margin-bottom: 4px;
}
.result-top h2 { font-size: 18px; font-family: var(--mono); }
.result-pills { display: flex; flex-wrap: wrap; gap: 8px; align-content: start; }
.result-pills .pill {
  border: 1px solid var(--border);
  background: #101318;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--dim);
}
.result-pills .pill strong { color: var(--text); margin-left: 4px; }
.result-codes {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 12px;
  min-height: 8px;
}
.result-codes .code-chip {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  max-width: 280px;
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 7px;
  background: rgba(245, 146, 11, 0.12);
  color: var(--accent);
  border: 1px solid rgba(245, 146, 11, 0.25);
}
.result-codes .code-chip strong { font-size: 13px; }
.result-codes .code-chip small {
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 11px;
  color: var(--dim);
  line-height: 1.25;
  white-space: normal;
}
.row-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.hex-details { margin: 12px 0; }
.hex-details summary {
  cursor: pointer;
  color: var(--dim);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
}
.recent-block { margin-top: 18px; }
.table-wrap.short { max-height: 220px; }
.records-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.diff-load {
  display: grid;
  grid-template-columns: 1.1fr 1.1fr 0.7fr 0.7fr auto auto auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 10px;
}
.diff-load label {
  display: flex; flex-direction: column; gap: 5px;
  font-size: 12px; color: var(--dim);
}
.diff-load input[type="file"],
.diff-load input[type="text"],
.diff-load input:not([type]) {
  border: 1px solid var(--border); border-radius: 8px;
  background: #101318; color: var(--text); padding: 8px;
}
.teach-hint { margin-bottom: 12px; }
.patch-panel { margin: 12px 0 16px; }
.patch-panel .row-actions { display: flex; gap: 8px; }
.patch-table-wrap { max-height: 280px; overflow: auto; }
.patch-table-wrap table { width: 100%; border-collapse: collapse; font-family: ui-monospace, Consolas, monospace; font-size: 12px; }
.patch-table-wrap th, .patch-table-wrap td { padding: 4px 10px; border-bottom: 1px solid var(--border, #333); text-align: left; }
.patch-table-wrap td:nth-child(2) { color: var(--green, #3ecf8e); }
.patch-table-wrap td:nth-child(3) { color: var(--red, #f07178); }

.hexdiff { margin-top: 4px; }
.hexdiff-titles {
  display: grid;
  grid-template-columns: 1fr 72px 1fr;
  gap: 8px;
  margin-bottom: 8px;
}
.hexdiff-title {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
}
.hexdiff-title strong { display: block; font-size: 13px; }
.hexdiff-title span { color: var(--mute); font-size: 11px; }
.hexdiff-title.ori strong { color: var(--green); }
.hexdiff-title.mod strong { color: var(--red); text-align: right; }
.hexdiff-title.mod span { display: block; text-align: right; }
.hexdiff-midhead { display: grid; place-items: center; }
.fark-box {
  width: 64px; min-height: 52px;
  border-radius: 10px;
  border: 1px solid rgba(239, 68, 68, 0.45);
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
  font-weight: 800;
  font-size: 12px;
  text-align: center;
  display: grid; place-items: center;
  line-height: 1.25;
  padding: 6px 4px;
}

.hexdiff-body {
  display: grid;
  grid-template-columns: 1fr 72px 1fr;
  gap: 8px;
  min-height: 480px;
}
.hexpane {
  margin: 0;
  background: #0a0c0f;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.45;
  color: var(--text);
  overflow: auto;
  white-space: pre;
  min-height: 480px;
  max-height: 62vh;
}
.hexpane .diff {
  background: #4a1a1a;
  color: #ffb4b4;
  border-radius: 2px;
}
.hexpane .addr { color: var(--mute); }
.hexdiff-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.btn.rail {
  width: 44px; height: 36px; padding: 0;
}
.rail-pos {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  text-align: center;
}
.rail-markers {
  flex: 1;
  width: 10px;
  margin: 8px 0 12px;
  border-radius: 6px;
  background: #101318;
  position: relative;
  min-height: 120px;
  overflow: hidden;
}
.rail-markers i {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--red);
  opacity: 0.85;
}

.hexdiff-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.hexdiff-foot input {
  width: 120px; height: 34px; border-radius: 8px;
  border: 1px solid var(--border); background: #101318; color: var(--text);
  padding: 0 10px; font-family: var(--mono);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr) 1.4fr;
  gap: 12px;
  margin-bottom: 18px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat .label { display: block; color: var(--mute); font-size: 11px; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.04em; }
.stat strong { font-size: 22px; font-weight: 700; }
.stat.wide strong { font-size: 15px; font-family: var(--mono); color: var(--accent); }

.tabs {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-bottom: 14px;
}
.tab {
  height: 34px; padding: 0 14px; border-radius: 999px;
  border: 1px solid transparent; background: transparent;
  color: var(--dim); cursor: pointer; font-weight: 600; font-size: 13px;
}
.tab:hover { color: var(--text); background: #1c222b; }
.tab.active {
  color: #1a1205;
  background: var(--accent);
}

.panel {
  display: none;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.panel.active { display: block; }
.panel-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 12px;
}
.panel-head h2 { font-size: 15px; }
.hint { color: var(--mute); font-size: 12px; }

.table-wrap { overflow: auto; max-height: 520px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td {
  text-align: left; padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { color: var(--mute); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; position: sticky; top: 0; background: var(--panel); }
tbody tr { cursor: default; }
tbody tr.clickable { cursor: pointer; }
tbody tr.clickable:hover { background: #1a1f27; }
.mono { font-family: var(--mono); font-size: 12px; }
.muted { color: var(--mute); }
.ok { color: var(--green); }
.warn { color: var(--accent); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  display: flex; flex-direction: column; gap: 10px;
}
.card.span-2 { grid-column: 1 / -1; }
.card h2 { font-size: 15px; margin-bottom: 2px; }
.card label { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--dim); }
.card input, .card textarea {
  border: 1px solid var(--border); border-radius: 8px;
  background: #101318; color: var(--text);
  padding: 9px 10px; font: inherit;
}
.card textarea { font-family: var(--mono); font-size: 12px; resize: vertical; }
.row { display: grid; grid-template-columns: 1.4fr 0.8fr 0.6fr 0.6fr; gap: 10px; }
.check {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
  margin-top: 22px;
}
.check input { width: auto; }
.diff-summary {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 4px;
}
.diff-summary .pill {
  border: 1px solid var(--border);
  background: #101318;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--dim);
}
.diff-summary .pill strong { color: var(--text); margin-left: 4px; }
.diff-summary .pill.warn strong { color: var(--accent); }

.code {
  margin-top: 6px;
  background: #0d1014;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--dim);
  white-space: pre-wrap;
  max-height: 220px;
  overflow: auto;
}

.toast {
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: #1a1f27;
  font-size: 13px;
}
.toast.ok { border-color: rgba(47, 191, 113, 0.35); color: var(--green); }
.toast.err { border-color: rgba(239, 68, 68, 0.35); color: var(--red); }

@media (max-width: 900px) {
  .stats, .stats.compact { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1fr 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .diff-load, .drop-grid { grid-template-columns: 1fr; }
  .hexdiff-titles, .hexdiff-body { grid-template-columns: 1fr; }
  .hexdiff-rail { flex-direction: row; min-height: auto; padding: 8px; }
  .rail-markers { display: none; }
}