:root {
  --bg: #f5f2ea;
  --surface: #fffdf9;
  --surface-2: #f0ede4;
  --text: #2b312d;
  --muted: #5f685f;
  --primary: #4d6a57;
  --primary-dark: #30473b;
  --accent: #a98d63;
  --border: #d6dbd0;
  --shadow: 0 18px 45px rgba(37, 47, 40, 0.08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; }
img { max-width: 100%; display: block; }
a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.site-header { color: white; padding: 1.1rem 0 4.5rem; background: linear-gradient(rgba(31,45,37,.58), rgba(31,45,37,.7)), linear-gradient(135deg, rgba(48,71,59,.95), rgba(77,106,87,.82)), url('https://images.unsplash.com/photo-1554224155-8d04cb21cd6c?auto=format&fit=crop&w=1600&q=80') center/cover no-repeat; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .9rem; color: white; font-weight: 700; }
.brand-logo { width: 72px; height: 72px; object-fit: cover; border-radius: 18px; border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.12); box-shadow: 0 10px 24px rgba(0,0,0,.18); }
.brand-copy { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: Georgia, 'Times New Roman', serif; font-size: 1.35rem; letter-spacing: .02em; }
.brand-tag { font-size: .78rem; text-transform: uppercase; letter-spacing: .16em; opacity: .82; }
.nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav a { color: rgba(255,255,255,.95); padding: .45rem .65rem; border-radius: 999px; }
.nav a:hover { text-decoration: none; background: rgba(255,255,255,.1); }
.hero { padding: 4rem 0 0; max-width: 760px; }
.eyebrow { display: inline-block; margin-bottom: 1rem; padding: .38rem .75rem; border-radius: 999px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); color: #f3ede3; font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; }
.hero h1, .page-hero h1, .section h2, .card h2, .card h3 { font-family: Georgia, 'Times New Roman', serif; letter-spacing: -.02em; }
.hero h1 { font-size: clamp(2.7rem, 5vw, 4.7rem); line-height: 1.04; margin: 0 0 1rem; }
.hero p { max-width: 740px; margin: 0 0 1rem; font-size: 1.08rem; color: rgba(249,246,239,.9); }
.hero-subtitle { font-size: 1.18rem; color: #f4ede2; margin-bottom: 1rem; }
.hero-panel { margin-top: 2rem; display: inline-block; padding: 1rem 1.15rem; background: rgba(255,253,249,.12); border: 1px solid rgba(255,255,255,.16); border-radius: 18px; backdrop-filter: blur(8px); }
.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.button { display: inline-block; background: var(--surface); color: var(--primary-dark); border: 1px solid rgba(255,255,255,.6); padding: .9rem 1.2rem; border-radius: 999px; font-weight: 700; box-shadow: 0 10px 24px rgba(0,0,0,.08); }
.button.secondary { background: transparent; color: white; border-color: rgba(255,255,255,.35); }
main { padding: 2.5rem 0 5rem; }
.page-shell { margin-top: -2.5rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.card { background: var(--surface); border: 1px solid rgba(89,102,91,.12); border-radius: 24px; padding: 1.5rem; box-shadow: var(--shadow); }
.card p { color: var(--muted); }
.feature-card { background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,244,236,.95)); }
.section { margin: 2rem 0; }
.section h2 { margin-bottom: .75rem; font-size: clamp(1.7rem, 3vw, 2.4rem); }
.lead { color: var(--muted); max-width: 850px; font-size: 1.04rem; }
.page-hero { background: linear-gradient(180deg, rgba(255,255,255,.8), rgba(255,253,249,.92)); border: 1px solid rgba(89,102,91,.12); border-radius: 30px; box-shadow: var(--shadow); padding: 2.25rem; margin-top: -2.5rem; }
.page-hero p { color: var(--muted); margin-bottom: 0; }
.calculator-layout { display: grid; grid-template-columns: 1.12fr .88fr; gap: 1.35rem; align-items: start; }
.input-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
label { display: block; font-weight: 700; margin-bottom: .45rem; color: var(--primary-dark); }
input { width: 100%; padding: .92rem .95rem; border-radius: 14px; border: 1px solid var(--border); font-size: 1rem; background: #fffefb; color: var(--text); }
.actions { margin-top: 1rem; display: flex; gap: .75rem; flex-wrap: wrap; }
button { background: var(--primary); color: white; border: none; border-radius: 999px; padding: .86rem 1.1rem; font-weight: 700; cursor: pointer; box-shadow: 0 10px 22px rgba(48,71,59,.18); }
button.secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.result-box { background: linear-gradient(180deg, #fffefc, #f8f4ec); border: 1px solid rgba(89,102,91,.12); border-radius: 24px; padding: 1.5rem; box-shadow: var(--shadow); position: sticky; top: 1rem; }
.result-label { color: var(--muted); font-size: .95rem; text-transform: uppercase; letter-spacing: .08em; }
.result-value { font-size: clamp(2.1rem, 4vw, 3.2rem); font-weight: 700; color: var(--primary-dark); margin: .45rem 0 .95rem; font-family: Georgia, 'Times New Roman', serif; }
.small-note, .muted { color: var(--muted); }
ul.checklist { padding-left: 1.2rem; }
ul.checklist li { margin-bottom: .55rem; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.stat { background: var(--surface); border: 1px solid rgba(89,102,91,.1); border-radius: 20px; padding: 1.2rem; box-shadow: var(--shadow); }
.stat-label { color: var(--muted); font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; }
.stat-value { margin-top: .35rem; font-size: 1.7rem; font-family: Georgia, 'Times New Roman', serif; color: var(--primary-dark); }
.site-footer { border-top: 1px solid rgba(89,102,91,.12); background: rgba(255,253,249,.88); padding: 2rem 0; color: var(--muted); }
.site-footer .container { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: .75rem; }
.table-like { display: grid; gap: .75rem; }
.table-row { padding: .95rem 1rem; background: rgba(77,106,87,.06); border: 1px solid rgba(77,106,87,.08); border-radius: 14px; }
.notice { padding: 1.1rem; border-left: 4px solid var(--accent); background: #f7f1e7; border-radius: 14px; }
.article-layout { max-width: 860px; }
@media (max-width: 900px) { .calculator-layout { grid-template-columns: 1fr; } .hero { padding-top: 3rem; } .result-box { position: static; } }
@media (max-width: 640px) { .topbar { flex-direction: column; align-items: flex-start; } .nav { gap: .45rem; } .nav a { padding: .35rem .55rem; font-size: .92rem; } .brand-copy { display: none; } .brand-logo { width: 60px; height: 60px; } .page-hero { padding: 1.5rem; } .hero h1 { font-size: 2.35rem; } .site-footer .container { flex-direction: column; } }