:root {
  --bg: #070a12;
  --bg-2: #0b0f1a;
  --card: rgba(255, 255, 255, 0.035);
  --card-2: rgba(255, 255, 255, 0.055);
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.16);
  --text: #e9ecf5;
  --muted: #8d94a8;
  --muted-2: #6b7286;
  --accent: #8b7cff;
  --accent-2: #3ddad7;
  --good: #4ade9b;
  --warn: #ffb454;
  --bad: #ff6b81;
  --grad: linear-gradient(115deg, #a99bff 0%, #7de3e0 100%);
  --radius: 18px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(124, 92, 255, 0.22), transparent 65%),
    radial-gradient(760px 480px at 92% 4%, rgba(61, 218, 215, 0.12), transparent 62%),
    radial-gradient(700px 700px at 50% 120%, rgba(124, 92, 255, 0.1), transparent 70%);
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background-image: linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}

a { color: #b9b0ff; text-decoration: none; }
a:hover { color: #d6d0ff; }

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 1px 5px;
  border-radius: 5px;
  color: #cfd5ea;
}

/* ---------------- top bar ---------------- */

.topbar {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px clamp(20px, 5vw, 56px);
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
}

.brand { display: flex; align-items: center; gap: 12px; }
.logo { width: 30px; height: 30px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 15px; letter-spacing: 0.2px; }
.brand-text span {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted-2);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.topbar-right { display: flex; align-items: center; gap: 14px; }

.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--muted);
  padding: 7px 11px;
  border-radius: 9px;
  border: 1px solid transparent;
  transition: 0.18s;
}
.ghost-link:hover { color: var(--text); border-color: var(--line); background: rgba(255, 255, 255, 0.04); }

.pill {
  font-size: 11.5px;
  font-family: var(--mono);
  color: #a9f0e2;
  background: rgba(61, 218, 215, 0.1);
  border: 1px solid rgba(61, 218, 215, 0.24);
  padding: 5px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------------- hero ---------------- */

main {
  position: relative;
  z-index: 2;
  flex: 1;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px clamp(20px, 5vw, 56px) 60px;
}

.hero { padding: 34px 0 38px; max-width: 760px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--muted);
  margin-bottom: 18px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(61, 218, 215, 0.12);
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.025em;
  font-weight: 650;
}
.hero h1 em {
  font-style: normal;
  font-family: var(--mono);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  max-width: 620px;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.chip {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.4px;
  color: #c8cdfa;
  background: rgba(139, 124, 255, 0.1);
  border: 1px solid rgba(139, 124, 255, 0.26);
  padding: 5px 10px;
  border-radius: 7px;
}
.chip.dim { color: var(--muted); background: rgba(255, 255, 255, 0.03); border-color: var(--line); }

/* ---------------- layout ---------------- */

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.card {
  position: relative;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.014));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 30px 80px -50px rgba(0, 0, 0, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(14px);
}

.main-card { padding: 22px; }

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-head h2 { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: 0.2px; }
.step { font-family: var(--mono); font-size: 11px; color: var(--muted-2); }

/* ---------------- dropzone ---------------- */

.dropzone {
  position: relative;
  border: 1.5px dashed rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  padding: 34px 20px;
  text-align: center;
  cursor: pointer;
  transition: 0.2s ease;
  background: radial-gradient(closest-side, rgba(139, 124, 255, 0.07), transparent) , rgba(255, 255, 255, 0.012);
  outline: none;
}
.dropzone:hover,
.dropzone:focus-visible { border-color: rgba(169, 155, 255, 0.55); background-color: rgba(139, 124, 255, 0.06); }
.dropzone.drag { border-color: var(--accent-2); background-color: rgba(61, 218, 215, 0.08); transform: scale(1.004); }

.dz-icon {
  width: 48px; height: 48px;
  margin: 0 auto 14px;
  display: grid; place-items: center;
  border-radius: 13px;
  color: #c5bcff;
  background: linear-gradient(160deg, rgba(139, 124, 255, 0.26), rgba(61, 218, 215, 0.12));
  border: 1px solid rgba(169, 155, 255, 0.28);
  box-shadow: 0 10px 30px -12px rgba(139, 124, 255, 0.7);
}
.dz-icon svg { width: 22px; height: 22px; }
.dz-title { font-size: 14.5px; color: #dfe3f2; }
.dz-title b { font-family: var(--mono); color: #fff; }
.dz-sub { margin-top: 6px; font-size: 12px; color: var(--muted-2); }

/* ---------------- file card ---------------- */

.file-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.035);
}
.fc-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #d8d2ff;
  background: rgba(139, 124, 255, 0.16);
  border: 1px solid rgba(139, 124, 255, 0.3);
  flex: none;
}
.fc-main { min-width: 0; flex: 1; }
.fc-name {
  font-size: 13.5px;
  font-family: var(--mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fc-meta { font-size: 11.5px; color: var(--muted-2); margin-top: 3px; }
.fc-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.5px;
  padding: 4px 8px;
  border-radius: 6px;
  color: #9df0e4;
  background: rgba(61, 218, 215, 0.1);
  border: 1px solid rgba(61, 218, 215, 0.24);
  white-space: nowrap;
}
.fc-tag.warn { color: #ffcf8f; background: rgba(255, 180, 84, 0.1); border-color: rgba(255, 180, 84, 0.3); }
.fc-tag.bad { color: #ff9aa8; background: rgba(255, 107, 129, 0.1); border-color: rgba(255, 107, 129, 0.3); }

.icon-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  width: 28px; height: 28px;
  border-radius: 8px;
  display: grid; place-items: center;
  cursor: pointer;
  transition: 0.16s;
  flex: none;
}
.icon-btn:hover { color: var(--text); border-color: var(--line-2); background: rgba(255, 255, 255, 0.06); }

/* ---------------- config box ---------------- */

.config-box {
  margin-top: 12px;
  border: 1px solid rgba(255, 180, 84, 0.28);
  background: rgba(255, 180, 84, 0.055);
  border-radius: 12px;
  padding: 14px;
}
.cb-head { display: flex; gap: 10px; }
.warn-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--warn);
  margin-top: 6px;
  flex: none;
  box-shadow: 0 0 0 4px rgba(255, 180, 84, 0.14);
}
.cb-head b { font-size: 12.5px; color: #ffd9a3; }
.cb-head p { margin: 4px 0 0; font-size: 12px; color: #b7a894; line-height: 1.6; }
.cb-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.cb-status { font-family: var(--mono); font-size: 11.5px; color: var(--muted); }

.manual { margin-top: 10px; }
.manual summary {
  cursor: pointer;
  font-size: 11.5px;
  color: var(--muted);
  list-style: none;
  user-select: none;
}
.manual summary::-webkit-details-marker { display: none; }
.manual summary::before { content: "＋ "; font-family: var(--mono); }
.manual[open] summary::before { content: "－ "; }
.manual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.manual-grid label { display: flex; flex-direction: column; gap: 5px; font-size: 11px; color: var(--muted); }
.manual-grid input {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  outline: none;
}
.manual-grid input:focus { border-color: rgba(139, 124, 255, 0.6); }

/* ---------------- buttons ---------------- */

.actions { display: flex; align-items: center; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.hint { margin-left: auto; font-size: 11.5px; color: var(--muted-2); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 550;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
  transition: 0.18s ease;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.09); border-color: var(--line-2); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn.primary {
  background: var(--grad);
  color: #0a0d18;
  border: none;
  font-weight: 650;
  box-shadow: 0 10px 30px -14px rgba(139, 124, 255, 0.9);
}
.btn.primary:hover:not(:disabled) { filter: brightness(1.06); transform: translateY(-1px); }
.btn.primary:active:not(:disabled) { transform: translateY(0); }

.btn.subtle { background: transparent; color: #c3c9dc; }
.btn.sm { padding: 8px 14px; font-size: 12.5px; border-radius: 9px; }
.btn.xs { padding: 5px 10px; font-size: 11.5px; border-radius: 7px; }

/* ---------------- progress ---------------- */

.progress { margin-top: 16px; }
.bar {
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.bar i {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--grad);
  transition: width 0.25s ease;
  box-shadow: 0 0 14px rgba(139, 124, 255, 0.6);
}
.ptext { margin-top: 8px; font-size: 11.5px; font-family: var(--mono); color: var(--muted); }

.notice {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.65;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid rgba(255, 107, 129, 0.28);
  background: rgba(255, 107, 129, 0.08);
  color: #ffb3bf;
}
.notice.ok { border-color: rgba(74, 222, 155, 0.26); background: rgba(74, 222, 155, 0.07); color: #a8f0cd; }

/* ---------------- tips ---------------- */

.tips {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.tip { display: flex; gap: 8px; font-size: 11.5px; line-height: 1.6; }
.tip b { color: #c3c9dc; font-weight: 550; flex: none; }
.tip span { color: var(--muted-2); }

/* ---------------- side card ---------------- */

.side-card { padding: 22px; }
.side-card h3 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #b6bcce;
}
.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.steps li {
  display: flex;
  gap: 10px;
  font-size: 12.5px;
  color: #a9b0c4;
  line-height: 1.55;
}
.steps span {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted-2);
  padding-top: 2px;
  flex: none;
}
.divider { height: 1px; background: var(--line); margin: 18px 0; }
.side-text { margin: 0; font-size: 12.5px; line-height: 1.72; color: var(--muted); }

/* ---------------- results ---------------- */

.result-card { margin-top: 20px; padding: 22px; }

.result-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.result-head h2 { margin: 0; font-size: 15px; font-weight: 600; }
.result-sub { margin-top: 5px; font-size: 12px; color: var(--muted); font-family: var(--mono); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 18px 0;
}
.stat {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.028);
  border-radius: 11px;
  padding: 11px 13px;
}
.stat .k { font-size: 10.5px; letter-spacing: 0.6px; text-transform: uppercase; color: var(--muted-2); }
.stat .v { margin-top: 5px; font-family: var(--mono); font-size: 15px; color: #eef1fa; }
.stat .v small { font-size: 11px; color: var(--muted); margin-left: 3px; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: 14px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.tree-pane, .preview-pane {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(0, 0, 0, 0.22);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 13px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  font-family: var(--mono);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--muted-2);
  background: rgba(255, 255, 255, 0.02);
}
.pv-name {
  font-family: var(--mono);
  text-transform: none;
  letter-spacing: 0;
  font-size: 11.5px;
  color: #c6cbe0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree { max-height: 520px; overflow: auto; padding: 6px; }
.tree ul { list-style: none; margin: 0; padding: 0; }
.tree ul ul { margin-left: 14px; border-left: 1px solid rgba(255, 255, 255, 0.07); padding-left: 4px; }

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 12.5px;
  color: #c2c8db;
  line-height: 1.35;
  border-left: 2px solid transparent;
  user-select: none;
}
.row:hover { background: rgba(255, 255, 255, 0.045); }
.row.active { background: rgba(139, 124, 255, 0.16); border-left-color: var(--accent); color: #fff; }
.row .ico { width: 15px; height: 15px; flex: none; color: var(--muted); }
.row.folder .ico { color: #a99bff; }
.row .nm { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row .sz { font-family: var(--mono); font-size: 10.5px; color: var(--muted-2); flex: none; }
.row .dl {
  opacity: 0;
  flex: none;
  color: var(--muted);
  display: grid;
  place-items: center;
  width: 18px; height: 18px;
  border-radius: 5px;
}
.row:hover .dl { opacity: 1; }
.row .dl:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.row .caret { transition: transform 0.15s; flex: none; color: var(--muted-2); }
li.closed > ul { display: none; }
li.closed > .row .caret { transform: rotate(-90deg); }

/* ---------------- preview ---------------- */

.preview {
  flex: 1;
  min-height: 380px;
  max-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  overflow: auto;
  position: relative;
}
.preview.image-mode {
  background-image:
    linear-gradient(45deg, rgba(255, 255, 255, 0.022) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.022) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.022) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.022) 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}
.preview img {
  max-width: 100%;
  max-height: 496px;
  object-fit: contain;
  border-radius: 6px;
  display: block;
}
.preview pre {
  margin: 0;
  width: 100%;
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: #cfd6ea;
  white-space: pre;
  tab-size: 2;
}
.preview .meta-note {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted-2);
  padding: 8px 10px;
  border-top: 1px dashed var(--line);
  width: 100%;
  text-align: center;
}
.pv-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--muted-2);
  font-size: 12px;
}
.pv-empty svg { width: 26px; height: 26px; opacity: 0.5; }

.audio-wrap { width: 100%; padding: 10px; }
.audio-wrap audio { width: 100%; }

.warn-list {
  margin-top: 14px;
  border: 1px dashed rgba(255, 180, 84, 0.3);
  border-radius: 10px;
  padding: 10px 13px;
  font-size: 11.5px;
  color: #d9be97;
  font-family: var(--mono);
  line-height: 1.7;
  max-height: 140px;
  overflow: auto;
}

/* ---------------- footer ---------------- */

footer {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 26px 20px 34px;
  font-size: 11.5px;
  color: var(--muted-2);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}
.dot-sep { width: 3px; height: 3px; border-radius: 50%; background: var(--muted-2); }

.hidden { display: none !important; }

body.with-result .hero { display: none; }
body.with-result .grid { margin-top: 10px; }

/* ---------------- feature strip ---------------- */

.strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.strip .item {
  display: flex;
  gap: 11px;
  padding: 15px 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.018);
}
.strip .item svg { width: 17px; height: 17px; flex: none; color: #9c8dff; margin-top: 2px; }
.strip b { display: block; font-size: 12.5px; font-weight: 600; margin-bottom: 4px; color: #d8dcea; }
.strip span { font-size: 11.5px; line-height: 1.6; color: var(--muted-2); }

@media (max-width: 980px) { .strip { grid-template-columns: 1fr; gap: 10px; } }

/* ---------------- scrollbars ---------------- */

* { scrollbar-width: thin; scrollbar-color: rgba(255, 255, 255, 0.16) transparent; }
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.13);
  border-radius: 99px;
  border: 2px solid transparent;
  background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.24); background-clip: content-box; }

/* ---------------- responsive ---------------- */

@media (max-width: 980px) {
  .grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .tree { max-height: 300px; }
  .preview { min-height: 300px; max-height: 420px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .topbar { padding: 16px 18px; }
  .pill { display: none; }
  main { padding: 0 18px 40px; }
  .hero { padding: 22px 0 26px; }
  .hero h1 { font-size: 30px; }
  .pc-only { display: none; }
  .main-card, .side-card, .result-card { padding: 16px; }
  .manual-grid { grid-template-columns: 1fr; }
  .hint { display: none; }
  .dropzone { padding: 26px 14px; }
  .result-actions { width: 100%; }
  .result-actions .btn { width: 100%; }
}