:root {
  --bg: #f6f8f4;
  --surface: #ffffff;
  --surface-soft: #eef3ea;
  --text: #132018;
  --muted: #5f6e64;
  --line: #dfe7df;
  --brand: #1f6a44;
  --brand-dark: #164d32;
  --brand-soft: #dff2e6;
  --accent: #d7f06d;
  --warning: #9a5d00;
  --shadow: 0 16px 50px rgba(24, 49, 34, 0.08);
  --radius: 22px;
  --radius-sm: 14px;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, select { font: inherit; }
button { cursor: pointer; }

.container { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; }
.skip-link { position: absolute; left: -999px; top: 8px; }
.skip-link:focus { left: 8px; z-index: 1000; background: #fff; padding: 8px 12px; border-radius: 8px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 248, 244, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(223, 231, 223, .8);
}
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 850; letter-spacing: -0.03em; font-size: 1.25rem; }
.brand-mark { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: var(--text); color: var(--accent); font-size: .9rem; letter-spacing: -.04em; }
.nav { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: .96rem; }
.nav a:hover, .nav a:focus-visible { color: var(--brand); }
.nav-cta { padding: 10px 14px; border-radius: 999px; color: #fff !important; background: var(--brand); }
.menu-btn { display: none; border: 1px solid var(--line); background: var(--surface); border-radius: 12px; padding: 9px 12px; }

.hero { padding: 82px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 54px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 750; font-size: .82rem; letter-spacing: .02em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -0.045em; margin: 0; }
h1 { font-size: clamp(2.7rem, 6.6vw, 5.4rem); max-width: 850px; }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: 1.25rem; }
.hero p { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--muted); max-width: 670px; margin: 24px 0 0; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 18px; border-radius: 13px; border: 1px solid transparent; font-weight: 760; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-secondary { background: var(--surface); border-color: var(--line); }
.btn-secondary:hover { border-color: #bfcabf; }
.hero-proof { margin-top: 26px; display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: .92rem; }
.hero-card { background: var(--text); color: #fff; border-radius: 30px; padding: 26px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.hero-card::after { content: ""; position: absolute; width: 190px; height: 190px; border-radius: 50%; right: -70px; top: -70px; background: var(--accent); opacity: .22; }
.mock-title { color: #bfd1c4; font-size: .86rem; }
.mock-value { font-size: 3rem; font-weight: 850; letter-spacing: -.05em; margin-top: 8px; }
.mock-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 22px; }
.mock-stat { background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.1); border-radius: 15px; padding: 14px; }
.mock-stat strong { display: block; font-size: 1.1rem; }
.mock-stat span { color: #bfd1c4; font-size: .82rem; }
.mock-recommend { margin-top: 12px; padding: 14px; border-radius: 15px; background: var(--accent); color: var(--text); font-weight: 800; }

.section { padding: 64px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-head p { margin: 0; max-width: 560px; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 8px 25px rgba(24,49,34,.035); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cad6ca; }
.card-icon { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: var(--surface-soft); font-size: 1.25rem; }
.card h3 { margin-top: 18px; }
.card p { color: var(--muted); margin: 10px 0 18px; }
.card-link { color: var(--brand); font-weight: 780; }

.process { background: var(--text); color: #fff; border-radius: 34px; padding: 42px; }
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 30px; }
.process-step { background: rgba(255,255,255,.075); border: 1px solid rgba(255,255,255,.09); border-radius: 18px; padding: 20px; }
.process-step b { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--text); margin-bottom: 14px; }
.process-step p { color: #c6d4ca; margin: 8px 0 0; }

.page-hero { padding: 60px 0 34px; }
.page-hero h1 { font-size: clamp(2.5rem, 5vw, 4.2rem); max-width: 900px; }
.page-hero p { color: var(--muted); max-width: 760px; font-size: 1.08rem; }
.breadcrumb { font-size: .88rem; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a { color: var(--brand); }

.calc-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); gap: 24px; align-items: start; padding-bottom: 70px; }
.calc-card, .result-card { background: var(--surface); border: 1px solid var(--line); border-radius: 26px; padding: 26px; box-shadow: 0 10px 28px rgba(24,49,34,.05); }
.calc-card h2, .result-card h2 { font-size: 1.4rem; letter-spacing: -.03em; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 22px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
label { font-weight: 720; font-size: .93rem; }
.helper { color: var(--muted); font-size: .8rem; }
input, select { width: 100%; min-height: 46px; border: 1px solid #cfd9cf; border-radius: 12px; background: #fff; color: var(--text); padding: 0 12px; outline: none; }
input:focus, select:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(31,106,68,.12); }
.calc-actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.result-card { position: sticky; top: 94px; }
.result-main { background: var(--text); color: #fff; border-radius: 20px; padding: 22px; margin-top: 20px; }
.result-label { color: #bfd1c4; font-size: .84rem; }
.result-number { font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 880; letter-spacing: -.06em; line-height: 1; margin-top: 7px; }
.result-sub { color: #bfd1c4; margin-top: 8px; }
.result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 12px; }
.result-item { background: var(--surface-soft); border-radius: 15px; padding: 14px; }
.result-item span { display: block; color: var(--muted); font-size: .78rem; }
.result-item strong { display: block; margin-top: 4px; font-size: 1.05rem; }
.notice { margin-top: 18px; padding: 14px 16px; border-left: 4px solid var(--brand); background: var(--brand-soft); border-radius: 10px; color: var(--brand-dark); font-size: .9rem; }
.notice.warning { border-left-color: #d58b19; background: #fff2dc; color: #6e4300; }

.content { max-width: 820px; }
.content h2 { margin-top: 38px; font-size: 1.8rem; }
.content h3 { margin-top: 28px; font-size: 1.25rem; }
.content p, .content li { color: #334038; }
.content a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.content table { width: 100%; border-collapse: collapse; margin: 20px 0; background: var(--surface); }
.content th, .content td { border: 1px solid var(--line); padding: 11px 12px; text-align: left; }
.content th { background: var(--surface-soft); }

.ad-slot { display: grid; place-items: center; min-height: 100px; border: 1px dashed #bdc9bd; border-radius: 16px; color: #7b887f; background: rgba(255,255,255,.45); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; }
.cta-band { display: flex; justify-content: space-between; gap: 22px; align-items: center; background: var(--accent); padding: 28px; border-radius: 24px; }
.cta-band h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
.cta-band p { margin: 8px 0 0; }

.site-footer { margin-top: 60px; border-top: 1px solid var(--line); background: #edf2ec; }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(3, 1fr); gap: 28px; padding: 42px 0; }
.footer-grid h3 { font-size: .95rem; letter-spacing: 0; margin-bottom: 12px; }
.footer-links { display: grid; gap: 8px; color: var(--muted); font-size: .9rem; }
.footer-bottom { border-top: 1px solid #d8e1d8; padding: 18px 0 28px; color: var(--muted); font-size: .84rem; display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }

.cookie-banner { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 100; max-width: 780px; margin: 0 auto; background: var(--text); color: #fff; border-radius: 18px; padding: 18px; box-shadow: 0 22px 60px rgba(0,0,0,.28); display: none; }
.cookie-banner.show { display: block; }
.cookie-banner p { margin: 0; color: #dbe5de; font-size: .88rem; }
.cookie-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.cookie-actions button { border: 1px solid rgba(255,255,255,.2); border-radius: 10px; padding: 8px 12px; font-weight: 700; }
.cookie-accept { background: var(--accent); color: var(--text); }
.cookie-reject { background: transparent; color: #fff; }

.badge { display: inline-flex; padding: 5px 9px; border-radius: 999px; background: var(--surface-soft); color: var(--muted); font-size: .75rem; font-weight: 700; }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }
.kpi { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 17px; }
.kpi strong { display: block; font-size: 1.45rem; letter-spacing: -.04em; }
.kpi span { color: var(--muted); font-size: .83rem; }

@media (max-width: 900px) {
  .hero-grid, .calc-layout { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .result-card { position: static; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; position: absolute; top: 73px; left: 16px; right: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 16px; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; }
  .nav.open { display: flex; }
  .menu-btn { display: inline-flex; }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 22px), var(--max)); }
  .hero { padding-top: 52px; }
  .grid, .process-grid, .form-grid, .result-grid, .kpis { grid-template-columns: 1fr; }
  .section-head, .cta-band { align-items: flex-start; flex-direction: column; }
  .process { padding: 26px; border-radius: 26px; }
  .calc-card, .result-card { padding: 20px; border-radius: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* Phase 2: energy guides */
.guide-hero p { max-width: 850px; }
.guide-intro { display:flex; justify-content:space-between; align-items:center; gap:28px; margin-bottom:30px; padding:24px; border:1px solid var(--line); border-radius:22px; background:var(--surface); }
.guide-intro h2 { margin:0 0 8px; font-size:1.7rem; }
.guide-intro p { margin:0; color:var(--muted); max-width:720px; }
.guide-grid .card p { min-height:72px; }
.article-layout { display:grid; grid-template-columns:minmax(0, 1fr) 300px; gap:40px; align-items:start; }
.guide-content { max-width:none; min-width:0; }
.guide-aside { position:sticky; top:94px; display:grid; gap:16px; }
.aside-card { background:var(--surface); border:1px solid var(--line); border-radius:20px; padding:20px; box-shadow:0 10px 28px rgba(24,49,34,.05); }
.aside-card h2 { margin:10px 0 6px; font-size:1.35rem; }
.aside-card p { margin:0 0 16px; color:var(--muted); font-size:.92rem; }
.answer-box { background:var(--text); color:#fff; border-radius:24px; padding:24px; margin-bottom:24px; }
.answer-box h2 { margin:8px 0 18px; color:#fff; font-size:clamp(1.45rem,3vw,2rem); }
.answer-kicker { color:var(--accent); font-size:.78rem; font-weight:800; text-transform:uppercase; letter-spacing:.08em; }
.quick-facts { display:grid; grid-template-columns:repeat(4,1fr); gap:10px; }
.quick-facts div { background:rgba(255,255,255,.09); border:1px solid rgba(255,255,255,.1); border-radius:15px; padding:13px; }
.quick-facts strong { display:block; font-size:1.2rem; letter-spacing:-.03em; }
.quick-facts span { display:block; color:#c9d7cd; font-size:.76rem; margin-top:2px; }
.fineprint { color:#c9d7cd !important; font-size:.8rem; margin:14px 0 0 !important; }
.toc { display:flex; gap:8px; flex-wrap:wrap; align-items:center; background:var(--surface-soft); border:1px solid var(--line); border-radius:16px; padding:14px; margin:20px 0 34px; }
.toc strong { margin-right:4px; }
.toc a { text-decoration:none; background:#fff; border:1px solid var(--line); border-radius:999px; padding:6px 10px; font-size:.82rem; }
.formula-box { overflow:auto; background:#edf2ec; border:1px solid var(--line); border-radius:14px; padding:16px; margin:18px 0; }
.formula-box code { white-space:nowrap; font-size:.9rem; }
.calculator-cta { display:flex; justify-content:space-between; align-items:center; gap:20px; background:var(--brand-soft); border:1px solid #c7e4d1; border-radius:20px; padding:20px; margin:28px 0; }
.calculator-cta h3 { margin:8px 0 4px; }
.calculator-cta p { margin:0; max-width:620px; }
.table-wrap { overflow-x:auto; }
.related-guides { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.guide-card { display:flex; gap:12px; align-items:center; background:var(--surface); border:1px solid var(--line); border-radius:16px; padding:16px; transition:.18s ease; }
.guide-card:hover { transform:translateY(-2px); border-color:#b9c9bc; box-shadow:0 10px 25px rgba(24,49,34,.06); }
.guide-card strong { display:block; }
.guide-card small { display:block; color:var(--brand); margin-top:2px; }
.guide-icon { width:42px; height:42px; display:grid; place-items:center; border-radius:12px; background:var(--surface-soft); font-size:1.2rem; flex:0 0 auto; }
.text-link { color:var(--brand); font-weight:750; }
@media (max-width:900px) { .article-layout { grid-template-columns:1fr; } .guide-aside { position:static; grid-template-columns:1fr 1fr; } .quick-facts { grid-template-columns:repeat(2,1fr); } }
@media (max-width:620px) { .guide-intro,.calculator-cta { align-items:flex-start; flex-direction:column; } .related-guides,.guide-aside { grid-template-columns:1fr; } .quick-facts { grid-template-columns:1fr 1fr; } .toc { align-items:flex-start; flex-direction:column; } .toc a { width:100%; border-radius:10px; } }