body { background: #f5f8f7; }
.prelim-hero { padding: 86px 0 58px; background: linear-gradient(135deg, rgba(15,77,58,.96), rgba(20,96,74,.88)), linear-gradient(90deg, rgba(217,197,41,.24), transparent); color: #fff; }
.prelim-hero .eyebrow, .prelim-hero .lead { color: #fff; }
.prelim-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 32px; align-items: center; }
.prelim-hero h1 { margin: 12px 0 16px; font-size: clamp(36px, 6vw, 70px); line-height: 1.02; letter-spacing: 0; }
.prelim-hero-note { border: 1px solid rgba(255,255,255,.24); border-radius: 8px; padding: 24px; background: rgba(255,255,255,.12); box-shadow: 0 24px 60px rgba(0,0,0,.16); }
.prelim-hero-note strong { display: block; margin-bottom: 8px; font-size: 22px; }
.prelim-hero-note p { margin: 0; color: rgba(255,255,255,.84); }
.prelim-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 22px; align-items: start; }
.prelim-sidebar { position: sticky; top: 98px; display: grid; gap: 10px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 0 14px 34px rgba(15,77,58,.08); }
.prelim-tab { min-height: 48px; border: 0; border-radius: 8px; padding: 0 14px; background: transparent; color: var(--muted); font-weight: 900; text-align: left; cursor: pointer; transition: .2s; }
.prelim-tab:hover, .prelim-tab.active { background: var(--primary); color: #fff; }
.prelim-main, .prelim-panel, .calc-grid, .input-card, .output-card, .sni-card { min-width: 0; }
.prelim-panel { display: none; border: 1px solid var(--line); border-radius: 8px; padding: 24px; background: #fff; box-shadow: 0 16px 40px rgba(15,77,58,.08); }
.prelim-panel.active { display: block; }
.panel-heading { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 22px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.panel-heading span { display: inline-flex; width: 48px; height: 48px; align-items: center; justify-content: center; border-radius: 8px; background: var(--soft); color: var(--primary); font-weight: 900; flex: 0 0 auto; }
.panel-heading h2 { margin: 0; color: var(--primary); font-size: clamp(26px, 3.4vw, 40px); line-height: 1.06; }
.panel-heading p { margin: 6px 0 0; color: var(--muted); }
.calc-grid { display: grid; grid-template-columns: minmax(280px, .85fr) minmax(0, 1fr); gap: 18px; align-items: stretch; }
.input-card, .output-card, .sni-card { border: 1px solid var(--line); border-radius: 8px; background: #fbfdfc; padding: 20px; }
.form-grid { display: grid; gap: 12px; }
.form-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid label { display: block; margin-bottom: 7px; color: var(--primary); font-size: 13px; font-weight: 900; }
.span-2 { grid-column: 1 / -1; }
.check-row { display: flex; align-items: center; gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.check-row input { width: 18px; height: 18px; accent-color: var(--primary); }
.check-row label { margin: 0; }
.full-btn { width: 100%; margin-top: 16px; }
.output-card { display: grid; gap: 12px; align-content: start; background: linear-gradient(180deg, #f9fcfb, #edf4f1); }
.result-kicker { color: var(--muted); font-size: 13px; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; }
.result-title { margin: 0; color: var(--primary); font-size: clamp(28px, 4vw, 48px); line-height: 1.02; }
.result-subtitle { margin: 0; color: var(--muted); }
.metric-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.metric { padding: 12px; border: 1px solid rgba(15,77,58,.12); border-radius: 8px; background: #fff; }
.metric span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; }
.metric strong { display: block; margin-top: 4px; color: var(--primary); font-size: 20px; overflow-wrap: anywhere; }
.status-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.status-list li { padding: 10px 12px; border-radius: 8px; background: #fff; color: var(--ink); font-weight: 800; }
.status-list li.ok { border-left: 4px solid #16865f; }
.status-list li.warn { border-left: 4px solid #d0a900; }
.sni-card { margin-top: 18px; background: #fff; }
.sni-card h3 { margin: 0 0 12px; color: var(--primary); font-size: 22px; }
.sni-card p { margin: 0 0 12px; color: var(--muted); }
.reference-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.reference-item { border: 1px solid var(--line); border-radius: 8px; padding: 12px; background: #fbfdfc; }
.reference-item strong { display: block; color: var(--primary); margin-bottom: 4px; }
.formula-box { display: grid; gap: 8px; margin: 14px 0; padding: 14px; border: 1px dashed #bfd1cb; border-radius: 8px; background: #f8fcfa; overflow-x: auto; }
.formula-box code { color: #0f4d3a; font-weight: 900; white-space: nowrap; }
.sni-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
.sni-table { width: 100%; border-collapse: collapse; min-width: 620px; }
.sni-table th, .sni-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; }
.sni-table th { background: var(--soft); color: var(--primary); font-weight: 900; }
.sni-table tr:last-child td { border-bottom: 0; }
.note-small { margin-top: 12px; color: var(--muted); font-size: 13px; }
@media (max-width: 1080px) { .prelim-layout, .calc-grid, .prelim-hero-grid { grid-template-columns: 1fr; } .prelim-sidebar { position: static; grid-template-columns: repeat(4, minmax(0, 1fr)); } .prelim-tab { text-align: center; } }
@media (max-width: 720px) { .prelim-panel { padding: 16px; } .form-grid.two, .reference-grid, .metric-grid, .prelim-sidebar { grid-template-columns: 1fr; } .panel-heading { display: grid; } .prelim-hero { padding-top: 64px; } }