:root {
  --bg: #faf8f4;
  --bg-grad: linear-gradient(135deg, #faf8f4 0%, #f5f1ea 100%);
  --card: #ffffff;
  --text: #1a1a1a;
  --text-mute: #6b7280;
  --text-dim: #9ca3af;
  --border: #e7e3dc;
  --border-soft: #efece5;
  --accent: #f97316;
  --accent-dark: #ea580c;
  --accent-soft: #fff7ed;
  --success: #10b981;
  --danger: #ef4444;
  --r: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg-grad);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Pretendard", system-ui, sans-serif;
  font-size: 15px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; }
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 18px;
  padding: 12px 22px; background: rgba(255,255,255,.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.logo { font-weight: 700; font-size: 16px; letter-spacing: -.01em; }
.logo span { color: var(--accent); }
.progress { display: flex; align-items: center; gap: 12px; }
.progress .track { flex: 1; height: 4px; background: var(--border-soft); border-radius: 2px; overflow: hidden; }
.progress .fill { height: 100%; background: var(--accent); transition: width .35s ease; width: 0%; }
.progress .text { color: var(--text-mute); font-size: 12px; min-width: 40px; text-align: right; }

.stage {
  min-height: calc(100vh - 110px);
  display: grid; place-items: start center;
  padding: 36px 20px 60px;
}
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r); padding: 40px 44px;
  width: 100%; max-width: 640px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.08);
  animation: slideIn .25s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.card-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent-soft); color: var(--accent-dark);
  padding: 4px 10px; border-radius: 14px;
  font-size: 11px; font-weight: 600;
  margin-bottom: 18px;
}
.card-num {
  color: var(--text-dim); font-size: 12px;
  letter-spacing: .04em; margin-bottom: 8px;
}
.card-title {
  font-size: 26px; font-weight: 700; letter-spacing: -.02em;
  line-height: 1.25; color: var(--text); margin: 0 0 8px;
}
.card-title.big { font-size: 32px; }
.card-desc {
  color: var(--text-mute); font-size: 14px; margin: 0 0 24px;
}
.input-wrap { margin-bottom: 8px; }
.card-actions {
  display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 28px;
}
.btn-primary {
  background: var(--text); color: white; border: 0;
  padding: 11px 22px; border-radius: 8px; font-size: 14px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background .15s;
}
.btn-primary:hover { background: var(--accent); }
.btn-primary.lg { padding: 14px 26px; font-size: 15px; }
.btn-ghost {
  background: transparent; color: var(--text-mute); border: 1px solid var(--border);
  padding: 10px 14px; border-radius: 8px; font-size: 13px;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }
.hint { color: var(--text-dim); font-size: 12px; }
.hint kbd {
  background: var(--accent-soft); padding: 2px 6px; border-radius: 4px;
  font-family: ui-monospace, monospace; font-size: 11px; color: var(--accent-dark);
}

.input-text {
  width: 100%; padding: 12px 14px; font-size: 18px;
  background: transparent; border: 0; border-bottom: 2px solid var(--border);
  color: var(--text); outline: none; transition: border-color .15s;
  font-family: inherit;
}
.input-text:focus { border-color: var(--accent); }
.input-textarea {
  width: 100%; padding: 14px 16px; font-size: 15px;
  border-radius: 8px; border: 1px solid var(--border);
  color: var(--text); outline: none; min-height: 110px; resize: vertical;
  font-family: inherit; transition: border-color .15s;
}
.input-textarea:focus { border-color: var(--accent); }

.choices { display: flex; flex-direction: column; gap: 8px; }
.choice {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 16px; border: 1.5px solid var(--border);
  border-radius: 10px; cursor: pointer; background: white;
  transition: all .12s;
  user-select: none;
}
.choice:hover { border-color: var(--accent); background: var(--accent-soft); }
.choice.selected { border-color: var(--accent); background: var(--accent-soft); }
.choice .key {
  width: 26px; height: 26px; border-radius: 6px;
  background: var(--border-soft); display: grid; place-items: center;
  font-size: 12px; font-weight: 600; color: var(--text-mute);
  flex-shrink: 0;
}
.choice.selected .key { background: var(--accent); color: white; }
.choice .label { flex: 1; font-size: 15px; }
.choice .arrow { color: var(--text-dim); font-size: 14px; }
.choice.selected .arrow { color: var(--accent); }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px; padding: 30px 20px;
  text-align: center; background: #fdfcfa;
  transition: all .15s; cursor: pointer;
}
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone .ic { font-size: 32px; margin-bottom: 8px; }
.dropzone .main { font-size: 15px; font-weight: 500; margin-bottom: 4px; }
.dropzone .sub { font-size: 12px; color: var(--text-mute); }
.file-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.file-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; background: white;
  border: 1px solid var(--border); border-radius: 8px;
}
.file-item.uploading { border-style: dashed; }
.file-item .ic { width: 32px; height: 32px; background: var(--accent-soft); border-radius: 6px; display: grid; place-items: center; font-size: 14px; flex-shrink: 0; }
.file-item .info { flex: 1; min-width: 0; }
.file-item .info .n { font-size: 13px; font-weight: 500; word-break: break-all; }
.file-item .info .s { font-size: 11px; color: var(--text-dim); }
.file-item .x { color: var(--text-dim); cursor: pointer; padding: 4px 8px; font-size: 14px; }
.file-item .x:hover { color: var(--text); }
.file-item .check { color: var(--success); font-size: 16px; }
.file-item .spin {
  width: 14px; height: 14px; border: 2px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.done-emoji { font-size: 60px; margin-bottom: 14px; text-align: center; }
.done-id {
  background: var(--accent-soft); color: var(--accent-dark);
  padding: 8px 14px; border-radius: 8px; font-family: ui-monospace, monospace;
  font-size: 13px; display: inline-block; margin: 12px auto 0;
}

.error {
  background: #fef2f2; color: var(--danger); border: 1px solid #fecaca;
  padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-top: 12px;
}

.footer {
  text-align: center; padding: 18px;
  color: var(--text-dim); font-size: 12px;
}

@media (max-width: 600px) {
  .card { padding: 28px 22px; border-radius: 12px; }
  .card-title { font-size: 22px; }
  .card-title.big { font-size: 26px; }
  .input-text { font-size: 16px; }
  .stage { padding: 22px 14px 40px; }
  .topbar { padding: 10px 14px; }
}