:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-input: #1c2128;
  --border: #30363d;
  --text-main: #e6edf3;
  --text-muted: #7d8590;
  --primary: #4493f8;
  --radius: 10px;
  --low: #38a169;
  --mod: #d4a847;
  --high: #e07b39;
  --vhigh: #e05252;
}

[data-theme="light"] {
  --bg: #f6f8fa;
  --bg-card: #ffffff;
  --bg-input: #f0f2f5;
  --border: #d0d7de;
  --text-main: #1f2328;
  --text-muted: #656d76;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text-main); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 15px; line-height: 1.6; padding: 1.5rem 1rem 3rem; }
.tool-wrapper { max-width: 660px; margin: 0 auto; }

.tool-header { text-align: center; margin-bottom: 2rem; }
.tool-header__badge { display: inline-flex; align-items: center; gap: 0.4rem; background: rgba(224,82,82,0.1); border: 1px solid rgba(224,82,82,0.3); color: var(--vhigh); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.3rem 0.8rem; border-radius: 20px; margin-bottom: 1rem; }
.tool-header h1 { font-size: 1.6rem; font-weight: 800; color: var(--text-main); margin-bottom: 0.5rem; }
.tool-header p { color: var(--text-muted); max-width: 520px; margin: 0 auto; font-size: 0.9rem; }

/* Factor form */
.factor-form { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.25rem; }
.factor-block { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem 1.5rem; }
.factor-label { font-size: 0.92rem; font-weight: 700; color: var(--text-main); margin-bottom: 0.3rem; }
.factor-help { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.9rem; line-height: 1.5; }
.factor-opts { display: flex; flex-direction: column; gap: 0.45rem; }
.opt-label { display: flex; align-items: flex-start; gap: 0.6rem; background: var(--bg-input); border: 1px solid var(--border); border-radius: 8px; padding: 0.6rem 0.85rem; cursor: pointer; transition: border-color 0.15s; }
.opt-label:hover { border-color: var(--primary); }
.opt-label:has(input:checked) { border-color: var(--primary); background: rgba(68,147,248,0.07); }
.opt-label input { margin-top: 0.15rem; accent-color: var(--primary); flex-shrink: 0; }
.opt-text { font-size: 0.87rem; color: var(--text-main); }

/* Button */
.calc-btn { width: 100%; padding: 0.9rem; background: var(--primary); color: #fff; border: none; border-radius: var(--radius); font-size: 0.95rem; font-weight: 700; cursor: pointer; transition: opacity 0.15s; margin-bottom: 1.25rem; }
.calc-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.calc-btn:not(:disabled):hover { opacity: 0.88; }

/* Result card */
.result-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 1rem; }
.result-header { display: flex; align-items: center; gap: 1rem; padding: 1.25rem 1.5rem; }
.result-header.tier-low  { background: rgba(56,161,105,0.1); border-bottom: 2px solid var(--low); }
.result-header.tier-mod  { background: rgba(212,168,71,0.1); border-bottom: 2px solid var(--mod); }
.result-header.tier-high { background: rgba(224,123,57,0.1); border-bottom: 2px solid var(--high); }
.result-header.tier-vhigh{ background: rgba(224,82,82,0.1);  border-bottom: 2px solid var(--vhigh); }
.result-icon { font-size: 2rem; }
.result-tier { font-size: 1.2rem; font-weight: 800; color: var(--text-main); }
.result-score { font-size: 0.82rem; color: var(--text-muted); }

.risk-bar-wrap { height: 6px; background: var(--bg-input); }
.risk-bar-fill { height: 100%; border-radius: 0 3px 3px 0; transition: width 0.6s ease; }
.risk-bar-fill.tier-low   { background: var(--low); }
.risk-bar-fill.tier-mod   { background: var(--mod); }
.risk-bar-fill.tier-high  { background: var(--high); }
.risk-bar-fill.tier-vhigh { background: var(--vhigh); }

.result-msg { font-size: 0.88rem; color: var(--text-muted); padding: 1rem 1.5rem; border-bottom: 1px solid var(--border); line-height: 1.6; }
.result-section { padding: 0.9rem 1.5rem; border-bottom: 1px solid var(--border); }
.result-section:last-child { border-bottom: none; }
.result-section-title { font-size: 0.77rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 0.5rem; }
.result-section-body { font-size: 0.86rem; color: var(--text-muted); line-height: 1.6; }
.result-section-body a { color: var(--primary); }
.result-list { padding-left: 1.2rem; }
.result-list li { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.35rem; }

.disclaimer { background: var(--bg-card); border: 1px solid var(--border); border-top: 3px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; font-size: 0.8rem; color: var(--text-muted); margin-top: 1.5rem; }
.disclaimer strong { color: var(--text-main); }