:root {
  --bg: #f3f5f9;
  --card: #ffffff;
  --text: #1f2733;
  --muted: #5d6b7d;
  --accent: #3b5bdb;
  --accent-dark: #2f49ad;
  --border: #e3e8f0;
  --success-bg: #e7f6ec;
  --success-text: #18794e;
  --danger: #c92a2a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }

.topbar {
  background: #101828;
  color: #fff;
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner { display: flex; align-items: center; gap: 14px; }
.badge {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
}
.topbar-title { font-weight: 600; font-size: 15px; opacity: 0.9; }

.hero { padding: 40px 0 10px; }
.hero h1 { font-size: 28px; margin: 0 0 10px; }
.hero p { color: var(--muted); margin: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  margin: 24px 0;
  box-shadow: 0 2px 10px rgba(16, 24, 40, 0.05);
}
.card-title { margin: 0 0 16px; font-size: 20px; }

.markdown-body { color: var(--text); font-size: 15.5px; }
.markdown-body h1 { font-size: 24px; margin-top: 0; }
.markdown-body h2 { font-size: 19px; margin-top: 28px; }
.markdown-body h3 { font-size: 17px; }
.markdown-body ul, .markdown-body ol { padding-left: 24px; }
.markdown-body li { margin-bottom: 4px; }
.markdown-body strong { color: #101828; }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.markdown-body blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  border-left: 4px solid #f0b429;
  background: #fdf6e3;
  border-radius: 0 8px 8px 0;
  color: #7a5300;
}

.nda-text {
  background: #fafbfd;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 4px 20px;
  max-height: 480px;
  overflow-y: auto;
}

.sign-card { border: 2px solid var(--accent); }
.sign-note { color: var(--muted); font-size: 14px; margin-top: -6px; }

.field { display: block; margin-bottom: 16px; }
.field span { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.field input {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 91, 219, 0.15);
}

.checkbox {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 20px;
  font-size: 14.5px;
  cursor: pointer;
}
.checkbox input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  flex-shrink: 0;
  cursor: pointer;
}

.btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 14px 26px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-dark); }
.btn:disabled { opacity: 0.6; cursor: default; }

.meta-box {
  background: #f0f4ff;
  border: 1px solid #dbe4ff;
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 14px;
}
.meta-box-title { font-weight: 600; margin-bottom: 6px; }
.meta-box ul { margin: 0; padding-left: 20px; }
.meta-box li { margin-bottom: 2px; }
.meta-box strong { color: #101828; }

.error { color: var(--danger); font-size: 14px; margin: 14px 0 0; }

.success {
  background: var(--success-bg);
  color: var(--success-text);
  border-radius: 10px;
  padding: 18px 22px;
}
.success h3 { margin: 0 0 6px; }
.success p { margin: 0; }
.success-details { margin-top: 10px !important; font-size: 13.5px; opacity: 0.9; }

.footer {
  color: var(--muted);
  font-size: 13px;
  padding: 24px 0 40px;
  text-align: center;
}

@media (max-width: 600px) {
  .hero { padding-top: 28px; }
  .hero h1 { font-size: 22px; }
  .card { padding: 20px; }
  .topbar-title { display: none; }
}