/* ============================================
   SEP Energieberatung — Design System
   Ink (navy) / Paper / Sun (gold accent) / Moss / Slate
   ============================================ */

:root {
  --ink: #011530;
  --ink-soft: #0e2a4a;
  --paper: #f4f6f7;
  --white: #ffffff;
  --sun: #f0a23a;        /* bright accent — pairs with --ink text on top */
  --sun-deep: #9a5a12;    /* text-on-light contexts (AA contrast) */
  --sun-soft: #f6c272;    /* text/stroke on dark navy backgrounds */
  --moss: #5b7553;        /* genuine savings/positive data only */
  --slate: #4b5563;
  --slate-light: #8a93a0;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 3px;
  --max-w: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

*:focus-visible { outline: 3px solid var(--sun-soft); outline-offset: 2px; }

.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Top bar ---------- */
.topbar { background: var(--ink); color: var(--white); font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; padding: 7px 0; text-align: center; }
.topbar span { opacity: 0.85; }

/* ---------- Header ---------- */
header.site { background: var(--white); border-bottom: 1px solid rgba(1, 21, 48, 0.08); position: sticky; top: 0; z-index: 50; }
.nav-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; max-width: var(--max-w); margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 34px; width: auto; }

nav.main-nav { display: flex; gap: 26px; font-size: 0.94rem; font-weight: 500; }
nav.main-nav a { padding: 6px 2px; border-bottom: 2px solid transparent; transition: border-color 0.15s ease; }
nav.main-nav a:hover, nav.main-nav a.active { border-color: var(--sun); }

.header-actions { display: flex; align-items: center; gap: 14px; }

.btn { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-body); font-weight: 600; font-size: 0.92rem; padding: 11px 20px; border-radius: var(--radius); border: 1.5px solid transparent; cursor: pointer; transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease; }
.btn-primary { background: var(--sun); color: var(--ink); }
.btn-primary:hover { background: #d8901f; transform: translateY(-1px); }
.btn-outline { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-outline:hover { background: var(--ink); color: var(--white); }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }
.menu-toggle svg { width: 26px; height: 26px; }

nav.mobile-nav { display: none; flex-direction: column; padding: 6px 24px 18px; gap: 2px; background: var(--white); border-top: 1px solid rgba(1, 21, 48, 0.08); }
nav.mobile-nav.open { display: flex; }
nav.mobile-nav a { padding: 11px 4px; font-weight: 500; border-bottom: 1px solid rgba(1, 21, 48, 0.06); }

/* ---------- Hero ---------- */
.hero { background: var(--ink); color: var(--white); padding: 84px 0 92px; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.eyebrow { font-family: var(--font-mono); font-size: 0.76rem; letter-spacing: 0.12em; color: var(--sun-soft); margin-bottom: 18px; text-transform: uppercase; }
.hero h1 { font-family: var(--font-display); font-size: clamp(2.3rem, 5vw, 3.5rem); line-height: 1.06; margin: 0 0 22px; font-weight: 600; letter-spacing: -0.01em; }
.hero p.lead { font-size: 1.08rem; color: rgba(255, 255, 255, 0.82); max-width: 500px; margin: 0 0 32px; }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-ctas .btn-outline { border-color: rgba(255, 255, 255, 0.45); color: var(--white); }
.hero-ctas .btn-outline:hover { background: var(--white); color: var(--ink); }
.hero-art { display: flex; justify-content: center; }
.hero-art img { width: 100%; max-width: 320px; }

/* hero hemisphere "seal" animation — closing the gap, nothing escapes */
.hero-art .ring-outer { animation: pulseRing 4s ease-in-out infinite; transform-origin: 120px 150px; }
.hero-caption { font-family: var(--font-mono); font-size: 0.72rem; color: rgba(255, 255, 255, 0.55); text-align: center; margin-top: 10px; letter-spacing: 0.02em; }
.hero-art .arc-top { transform-origin: 120px 150px; animation: sealTop 1.1s ease-out forwards; }
.hero-art .arc-bottom { transform-origin: 120px 150px; animation: sealBottom 1.1s ease-out forwards; }
.hero-art .handle { animation: fadeIn 0.8s ease-out 0.6s forwards; opacity: 0; }
.hero-art .pull-left, .hero-art .pull-right { animation: fadeIn 0.8s ease-out 0.9s forwards; opacity: 0; }
@keyframes sealTop { from { transform: translateY(-16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes sealBottom { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes fadeIn { to { opacity: 0.9; } }
@keyframes pulseRing { 0%, 100% { opacity: 0.12; } 50% { opacity: 0.24; } }

/* ---------- Stat strip ---------- */
.stats { background: var(--white); border-bottom: 1px solid rgba(1, 21, 48, 0.08); }
.stats .wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; padding: 38px 24px; }
.stat-num { font-family: var(--font-mono); font-size: 1.9rem; color: var(--sun-deep); font-weight: 600; }
.stat-label { font-size: 0.9rem; color: var(--slate); margin-top: 4px; }

/* ---------- Section generic ---------- */
.section { padding: 72px 0; }
.section-head { max-width: 640px; margin-bottom: 42px; }
.section-label { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.1em; color: var(--sun-deep); text-transform: uppercase; margin-bottom: 10px; }
.section h2 { font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.1rem); margin: 0 0 14px; font-weight: 600; }
.section p.section-sub { color: var(--slate); font-size: 1.01rem; }

/* ---------- Building-type cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: var(--white); border: 1px solid rgba(1, 21, 48, 0.1); border-radius: var(--radius); padding: 28px 24px; transition: border-color 0.15s ease, transform 0.15s ease; }
.card:hover { border-color: var(--sun); transform: translateY(-3px); }
.card h3 { font-family: var(--font-display); font-size: 1.22rem; margin: 0 0 10px; }
.card p { color: var(--slate); font-size: 0.94rem; margin: 0 0 16px; }
.card .tag { display: inline-block; font-family: var(--font-mono); font-size: 0.7rem; background: rgba(1, 21, 48, 0.06); color: var(--ink); padding: 5px 10px; border-radius: 2px; letter-spacing: 0.03em; }
.card a.card-link { font-size: 0.88rem; font-weight: 600; color: var(--sun-deep); display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; }

/* ---------- Callout (Guericke story) ---------- */
.callout { background: var(--white); border-left: 4px solid var(--sun); padding: 30px 34px; border-radius: var(--radius); }
.callout h3 { font-family: var(--font-display); margin: 0 0 12px; font-size: 1.26rem; }
.callout p { color: var(--slate); margin: 0; font-size: 0.99rem; }

/* ---------- Why grid ---------- */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 34px; }
.why-item { display: flex; gap: 14px; align-items: flex-start; }
.why-item .mark { width: 8px; height: 8px; border-radius: 50%; background: var(--moss); margin-top: 8px; flex-shrink: 0; }
.why-item p { margin: 0; color: var(--ink); font-size: 0.97rem; }

/* ---------- Funding band ---------- */
.funding { background: var(--ink-soft); color: var(--white); }
.funding .section-label { color: var(--sun-soft); }
.funding h2 { color: var(--white); }
.funding p.section-sub { color: rgba(255, 255, 255, 0.78); }
.funding-list { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0 28px; }
.funding-list span { font-family: var(--font-mono); font-size: 0.8rem; background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.2); padding: 8px 13px; border-radius: 2px; }
.funding a.card-link { color: var(--sun-soft); font-weight: 600; font-size: 0.92rem; }

.funding-callout { background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius); padding: 16px 22px; display: inline-flex; align-items: center; gap: 16px; margin-bottom: 32px; }
.funding-callout .num { font-family: var(--font-mono); font-size: 1.8rem; color: var(--sun-soft); font-weight: 700; }
.funding-callout span:last-child { font-size: 0.92rem; }

.measures-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin-bottom: 36px; }
.measure { text-align: center; }
.measure .icon-circle { width: 58px; height: 58px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; color: var(--sun-soft); }
.measure .icon-circle svg { width: 26px; height: 26px; }
.measure h4 { font-family: var(--font-display); font-size: 0.92rem; margin: 0 0 4px; color: var(--white); }
.measure p { font-size: 0.78rem; color: rgba(255, 255, 255, 0.65); margin: 0; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
.contact-card { background: var(--white); border: 1px solid rgba(1, 21, 48, 0.1); padding: 28px; border-radius: var(--radius); }
.contact-row { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid rgba(1, 21, 48, 0.06); font-size: 0.95rem; }
.contact-row:last-child { border-bottom: none; }
.contact-row strong { font-family: var(--font-mono); font-size: 0.76rem; color: var(--slate); min-width: 92px; text-transform: uppercase; letter-spacing: 0.03em; flex-shrink: 0; }
.hours-table { width: 100%; font-size: 0.91rem; margin-top: 6px; }
.hours-table td { padding: 4px 0; }
.hours-table td:last-child { text-align: right; font-family: var(--font-mono); }
.map-frame { border: 0; width: 100%; height: 280px; border-radius: var(--radius); }

/* ---------- Footer ---------- */
footer.site { background: var(--ink); color: rgba(255, 255, 255, 0.75); padding: 48px 0 28px; font-size: 0.91rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
footer.site h4 { color: var(--white); font-family: var(--font-display); font-size: 0.98rem; margin: 0 0 12px; }
footer.site p { max-width: 320px; opacity: 0.85; }
footer.site a { display: block; padding: 4px 0; opacity: 0.85; }
footer.site a:hover { opacity: 1; color: var(--sun-soft); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.15); padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.8rem; opacity: 0.7; font-family: var(--font-mono); }

/* ---------- Energy efficiency scale ---------- */
.energy-section { background: var(--ink); color: var(--white); }
.energy-section .section-sub { color: rgba(255, 255, 255, 0.78); }
.energy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.energy-scale { display: flex; flex-direction: column; gap: 7px; max-width: 380px; }
.energy-scale .bar {
  height: 36px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: #ffffff;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 50%, calc(100% - 20px) 100%, 0 100%);
  transition: transform 0.15s ease;
}
.energy-scale .bar:hover { transform: translateX(4px); }
.energy-scale .bar.dark-text { color: #1a1a1a; }
.energy-note { font-family: var(--font-mono); font-size: 0.78rem; color: var(--sun-soft); margin-top: 14px; }

/* ---------- Before / after showcase ---------- */
.beforeafter { position: relative; border-radius: var(--radius); overflow: hidden; line-height: 0; }
.beforeafter img { width: 100%; display: block; }
.ba-label {
  position: absolute; top: 4%;
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(0.9rem, 2.2vw, 1.4rem);
  color: var(--white);
  background: rgba(1, 21, 48, 0.55);
  padding: 8px 18px;
  border-radius: 4px;
  letter-spacing: 0.02em;
}
.ba-label.before { left: 3%; }
.ba-label.after { left: 53%; background: rgba(154, 90, 18, 0.75); }
.ba-percent {
  position: absolute; top: 38%; left: 50%; transform: translateX(-50%);
  width: clamp(80px, 13vw, 130px); height: clamp(80px, 13vw, 130px);
  border-radius: 50%; background: var(--sun); color: var(--ink);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
  border: 3px solid var(--ink);
}
.ba-percent .big { font-size: clamp(1.5rem, 4vw, 2.3rem); line-height: 1; }
.ba-disclaimer { font-family: var(--font-mono); font-size: 0.78rem; color: var(--slate-light); margin: 10px 0 0; }
.ba-cta-bar {
  background: var(--ink); color: var(--white);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px;
  padding: 28px 32px; border-radius: var(--radius); margin-top: 18px;
}
.ba-cta-bar h3 { font-family: var(--font-display); margin: 0 0 6px; font-size: 1.25rem; }
.ba-cta-bar p { margin: 0; color: rgba(255, 255, 255, 0.78); font-size: 0.95rem; max-width: 480px; }

/* ---------- Page header (sub-pages) ---------- */
.page-header { background: var(--ink); color: var(--white); padding: 58px 0 50px; }
.page-header h1 { font-family: var(--font-display); font-size: clamp(1.9rem, 4vw, 2.6rem); margin: 0 0 14px; font-weight: 600; letter-spacing: -0.01em; }
.page-header p.lead { color: rgba(255, 255, 255, 0.82); max-width: 620px; font-size: 1.03rem; margin: 0; }

.pill-nav { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 28px; }
.pill-nav a { font-family: var(--font-mono); font-size: 0.8rem; background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.22); color: var(--white); padding: 9px 16px; border-radius: 20px; transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease; }
.pill-nav a:hover { background: var(--sun); color: var(--ink); border-color: var(--sun); }

/* ---------- Funding fact cards ---------- */
.fact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.fact-card { background: var(--white); border: 1px solid rgba(1, 21, 48, 0.1); border-radius: var(--radius); padding: 24px 26px; }
.fact-card.wide { grid-column: 1 / -1; }
.fact-num { display: block; font-family: var(--font-mono); font-size: 1.7rem; color: var(--sun-deep); font-weight: 700; line-height: 1; margin-bottom: 10px; }
.fact-card h4 { font-family: var(--font-display); font-size: 1.02rem; margin: 0 0 8px; }
.fact-card p { color: var(--slate); font-size: 0.91rem; margin: 0; }
.fact-disclaimer { font-family: var(--font-mono); font-size: 0.78rem; color: var(--slate-light); margin: 22px 0 0; }

.building-section { padding: 60px 0; border-top: 1px solid rgba(1, 21, 48, 0.08); }
.building-section .section-sub { max-width: 720px; }
.building-section .intro-text { color: var(--slate); font-size: 0.99rem; max-width: 720px; margin: -10px 0 32px; }
.building-section h3.sub-head { font-family: var(--font-display); font-size: 1.15rem; margin: 0 0 18px; }
.check-stack { display: flex; flex-direction: column; gap: 16px; margin-bottom: 40px; }

/* ---------- Legal content (Impressum / Datenschutz) ---------- */
.legal-content { max-width: 720px; }
.legal-meta { font-family: var(--font-mono); font-size: 0.8rem; color: var(--slate-light); margin: 0 0 40px; }
.legal-block { margin-bottom: 38px; }
.legal-block:last-child { margin-bottom: 0; }
.legal-block h3 { font-family: var(--font-display); font-size: 1.1rem; margin: 0 0 12px; }
.legal-block p { color: var(--slate); margin: 0 0 12px; font-size: 0.97rem; }
.legal-block p:last-child { margin-bottom: 0; }
.legal-block address { font-style: normal; color: var(--slate); margin: 0 0 12px; line-height: 1.7; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  nav.main-nav { display: none; }
  .menu-toggle { display: block; }
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 200px; margin: 0 auto 12px; }
  .card-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .energy-grid { grid-template-columns: 1fr; }
  .measures-grid { grid-template-columns: repeat(2, 1fr); }
  .fact-grid { grid-template-columns: 1fr; }
  .fact-card.wide { grid-column: auto; }
}
@media (max-width: 480px) {
  .ba-cta-bar { flex-direction: column; align-items: flex-start; }
  .measures-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats .wrap { grid-template-columns: 1fr; gap: 18px; padding: 28px 24px; }
}