:root {
  --accent: #f6821f;
  --accent-dark: #d96a0a;
  --accent-soft: #fff4e8;
  --navy: #0f172a;
  --navy-2: #1e293b;
  --ink: #0f172a;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --line: #e2e8f0;
  --ok: #16a34a;
  --ok-soft: #ecfdf3;
  --warn: #d97706;
  --warn-soft: #fffbeb;
  --err: #dc2626;
  --err-soft: #fef2f2;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 12px 32px -12px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 300px; flex: none; background: linear-gradient(180deg, var(--navy) 0%, #16213b 100%);
  color: #e2e8f0; padding: 32px 24px; display: flex; flex-direction: column; gap: 28px;
  position: sticky; top: 0; height: 100vh;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { width: 40px; height: 40px; flex: none; border-radius: 12px; background: var(--accent); position: relative; }
.logo::after {
  content: ""; position: absolute; inset: 12px 9px 9px 12px;
  border: 2.5px solid #fff; border-radius: 4px 4px 6px 4px;
}
.brand-text b { display: block; font-size: 17px; color: #fff; letter-spacing: 0.2px; }
.brand-text small { display: block; font-size: 12px; color: #94a3b8; margin-top: 1px; }

.stepper { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.stepper li {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px;
  color: #94a3b8; font-size: 14px; font-weight: 500; position: relative;
}
.stepper li .dot {
  width: 26px; height: 26px; flex: none; border-radius: 50%;
  border: 2px solid #475569; display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #94a3b8; transition: all 0.2s;
}
.stepper li.active { background: rgba(246, 130, 31, 0.12); color: #fff; }
.stepper li.active .dot { border-color: var(--accent); color: var(--accent); background: transparent; }
.stepper li.done { color: #cbd5e1; }
.stepper li.done .dot { border-color: #34d399; background: #34d399; color: #06291c; }
.stepper li.done .dot::before { content: "✓"; }
.sidebar-foot { margin-top: auto; font-size: 11.5px; color: #64748b; line-height: 1.5; }

.content { flex: 1; padding: 40px 32px 56px; max-width: 760px; }
.content-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.content-head h1 { margin: 0; font-size: 24px; letter-spacing: -0.3px; }
.content-head p { margin: 4px 0 0; color: var(--muted); font-size: 13.5px; }
.progress { width: 160px; height: 6px; background: var(--line); border-radius: 99px; overflow: hidden; flex: none; }
.progress-bar { height: 100%; width: 20%; background: var(--accent); border-radius: 99px; transition: width 0.3s ease; }

.step { display: none; animation: fade 0.28s ease; }
.step.active { display: block; }
.step h2, .qgroup h3 { margin: 0 0 16px; font-size: 17px; font-weight: 600; letter-spacing: -0.2px; }
.qgroup { margin-bottom: 26px; }
.qgroup h3 small { color: var(--muted); font-weight: 400; }

@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 7px; color: #334155; }
.field label em { color: var(--err); font-style: normal; }
.field input, .field select {
  width: 100%; padding: 12px 14px; font-size: 15px; font-family: inherit;
  border: 1.5px solid var(--line); border-radius: 12px; background: var(--card); color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(246, 130, 31, 0.15);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.options { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.option {
  position: relative; display: flex; align-items: center; gap: 12px; cursor: pointer;
  border: 1.5px solid var(--line); border-radius: 14px; padding: 14px 16px;
  background: var(--card); transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.option:hover { border-color: #cbd5e1; box-shadow: 0 4px 14px -6px rgba(15, 23, 42, 0.12); }
.option input { position: absolute; opacity: 0; pointer-events: none; }
.opt-body b { display: block; font-size: 14.5px; font-weight: 600; }
.opt-body small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.opt-check {
  width: 20px; height: 20px; flex: none; border-radius: 50%; border: 2px solid #cbd5e1;
  margin-left: auto; position: relative; transition: all 0.15s;
}
.option:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 4px rgba(246, 130, 31, 0.1); }
.option:has(input:checked) .opt-check { border-color: var(--accent); background: var(--accent); }
.option:has(input:checked) .opt-check::after {
  content: ""; position: absolute; left: 5px; top: 2px; width: 5px; height: 9px;
  border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg);
}

.conditional {
  margin-top: 20px; padding: 18px; border: 1.5px dashed var(--line); border-radius: 14px; background: #fff;
}

.nav { display: flex; justify-content: space-between; margin-top: 28px; }
.btn {
  border: none; cursor: pointer; font-size: 14.5px; font-weight: 600; font-family: inherit;
  padding: 12px 28px; border-radius: 12px; transition: background 0.15s, box-shadow 0.15s, color 0.15s;
  text-decoration: none; display: inline-block;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: var(--card); color: var(--ink); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: #cbd5e1; }
.btn-outline { background: var(--accent-soft); color: var(--accent-dark); border: 1.5px solid var(--accent); }
.btn-outline:hover { background: #ffe9d3; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }

.result-banner {
  display: flex; align-items: center; gap: 16px; padding: 20px 24px; border-radius: var(--radius);
  margin-bottom: 18px; border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow);
}
.result-banner.ok { border-color: #bbf7d0; background: var(--ok-soft); }
.result-banner.warn { border-color: #fde68a; background: var(--warn-soft); }
.result-banner.err { border-color: #fecaca; background: var(--err-soft); }
.banner-icon {
  width: 44px; height: 44px; flex: none; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; background: #fff; border: 1.5px solid var(--line);
}
.result-banner.ok .banner-icon { color: var(--ok); border-color: #bbf7d0; }
.result-banner.warn .banner-icon { color: var(--warn); border-color: #fde68a; }
.result-banner.err .banner-icon { color: var(--err); border-color: #fecaca; }
.result-banner h2 { margin: 0; font-size: 18px; }
.result-banner p { margin: 3px 0 0; color: var(--muted); font-size: 13.5px; }

.result-badges { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.badge { font-size: 12px; font-weight: 700; padding: 5px 13px; border-radius: 99px; background: #eef2f7; color: var(--muted); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.err { background: var(--err-soft); color: var(--err); }
.result-card h3 { margin: 0 0 14px; font-size: 19px; letter-spacing: -0.2px; }
.result-notes { color: var(--muted); margin: 14px 0 0; font-size: 14px; }
.warnings { margin-top: 18px; padding: 16px 18px; background: var(--warn-soft); border: 1px solid #fde68a; border-radius: 12px; }
.warnings h4 { margin: 0 0 8px; font-size: 13px; color: var(--warn); text-transform: uppercase; letter-spacing: 0.6px; }
.warnings ul { margin: 0; padding-left: 20px; color: #92400e; font-size: 13.5px; }
.result-actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.result-actions .btn { padding: 11px 22px; font-size: 13.5px; }
pre {
  margin-top: 20px; padding: 16px; background: #0f172a; color: #cbd5e1;
  border-radius: 12px; font-size: 12px; overflow: auto; max-height: 280px; white-space: pre-wrap;
  font-family: "SF Mono", Consolas, Menlo, monospace;
}

.content-foot { margin-top: 44px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12.5px; }

.upload { margin-top: 20px; padding: 18px; border: 1.5px dashed #cbd5e1; border-radius: 14px; background: #fbfdff; }
.upload h4 { margin: 0 0 6px; font-size: 14.5px; }
.upload-hint { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.upload-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.upload-row input[type="file"] { font-size: 13px; max-width: 100%; }
.upload-msg { margin: 10px 0 0; font-size: 13.5px; }
.upload-msg.ok { color: var(--ok); }
.upload-msg.err { color: var(--err); }

@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; padding: 20px; gap: 16px; }
  .sidebar-foot { display: none; }
  .stepper { flex-direction: row; overflow-x: auto; gap: 8px; }
  .stepper li { flex: none; padding: 8px 12px; font-size: 12.5px; }
  .content { padding: 24px 20px 48px; }
  .content-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .progress { width: 100%; }
}
@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
  .options { grid-template-columns: 1fr; }
}