/* ── SHARED STYLES – NetzSpeicher GmbH ── */
:root {
  --bg:        #0B1520;
  --surface:   #1E2D3D;
  --surface2:  #253445;
  --border:    #2D3748;
  --yellow:    #F7B500;
  --yellow-dim: rgba(247,181,0,.12);
  --green:     #28C244;
  --green-dim: rgba(40,194,68,.10);
  --text:      #EEF2F7;
  --muted:     #7A8FA6;
  --radius:    12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg); color: var(--text);
  line-height: 1.6; overflow-x: hidden;
}

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 68px; padding: 0 5%;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(11,21,32,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.nav-logo { text-decoration: none; }
.nav-logo-name {
  font-family: 'Poppins', sans-serif; font-weight: 700;
  font-size: 1.1rem; color: var(--yellow); display: block;
}
.nav-logo-sub {
  font-size: .62rem; color: var(--muted);
  letter-spacing: .16em; font-family: 'Poppins', sans-serif;
}
.nav-links { display: flex; align-items: center; gap: 1.75rem; }
.nav-links a {
  color: var(--muted); text-decoration: none;
  font-size: .85rem; font-family: 'Poppins', sans-serif; font-weight: 500;
  transition: color .2s; padding: .25rem 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); border-bottom-color: var(--yellow); }
.nav-cta {
  background: var(--yellow) !important; color: #0B1520 !important;
  padding: .45rem 1.1rem !important; border-radius: 6px;
  border-bottom: none !important; font-weight: 600 !important;
  transition: background .2s !important;
}
.nav-cta:hover { background: #FFD03A !important; }

/* PAGE HERO */
.page-hero {
  padding: 140px 5% 80px;
  border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.page-hero-inner { max-width: 820px; }
.page-hero .breadcrumb {
  font-size: .75rem; color: var(--muted);
  font-family: 'Poppins', sans-serif; letter-spacing: .08em;
  margin-bottom: 1rem; display: flex; gap: .5rem; align-items: center;
}
.page-hero .breadcrumb a { color: var(--muted); text-decoration: none; }
.page-hero .breadcrumb a:hover { color: var(--yellow); }
.page-hero h1 {
  font-family: 'Poppins', sans-serif; font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.1;
  margin-bottom: 1.25rem;
}
.page-hero h1 em { color: var(--yellow); font-style: normal; }
.page-hero p {
  font-size: 1.05rem; color: var(--muted); max-width: 620px; line-height: 1.8;
}
.page-hero-bg {
  position: absolute; right: 5%; top: 50%; transform: translateY(-50%);
  font-size: 8rem; opacity: .05; pointer-events: none; user-select: none;
}

/* SECTIONS */
.section { padding: 80px 5%; max-width: 1100px; margin: 0 auto; }
.section-full { padding: 80px 5%; }
.section-full-inner { max-width: 1100px; margin: 0 auto; }
.section-label {
  font-family: 'Poppins', sans-serif; font-size: .7rem; font-weight: 600;
  letter-spacing: .18em; color: var(--green); text-transform: uppercase;
  margin-bottom: .85rem; display: block;
}
h2 {
  font-family: 'Poppins', sans-serif; font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700; line-height: 1.15; margin-bottom: 1rem; color: var(--text);
}
h2 em { color: var(--yellow); font-style: normal; }
h3 {
  font-family: 'Poppins', sans-serif; font-weight: 600;
  font-size: 1.05rem; color: var(--text); margin-bottom: .6rem;
}
.lead {
  font-size: 1rem; color: var(--muted); max-width: 640px;
  line-height: 1.8; margin-bottom: 2.5rem;
}
.bg-surface { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* GRIDS */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; }

/* CARDS */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.75rem;
  transition: border-color .22s, transform .22s;
}
.card:hover { border-color: var(--yellow); transform: translateY(-3px); }
.card-icon {
  width: 46px; height: 46px; border-radius: 10px;
  background: var(--yellow-dim); border: 1px solid rgba(247,181,0,.25);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 1.1rem;
}
.card p { font-size: .9rem; color: var(--muted); line-height: 1.75; }
.card-green .card-icon { background: var(--green-dim); border-color: rgba(40,194,68,.25); }

/* STEPS */
.steps-list { display: flex; flex-direction: column; gap: 0; }
.step-item {
  display: grid; grid-template-columns: 56px 1fr; gap: 1.5rem;
  padding: 2rem 0; border-bottom: 1px solid var(--border);
  align-items: start;
}
.step-item:last-child { border-bottom: none; }
.step-num {
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--yellow-dim); border: 2px solid rgba(247,181,0,.35);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Poppins', sans-serif; font-weight: 700;
  color: var(--yellow); font-size: 1rem; flex-shrink: 0;
}
.step-content h3 { margin-bottom: .5rem; font-size: 1.05rem; }
.step-content p { font-size: .9rem; color: var(--muted); line-height: 1.75; }

/* NUMBERS/STATS */
.big-stat {
  font-family: 'Poppins', sans-serif; font-weight: 700;
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--yellow); line-height: 1; display: block; margin-bottom: .25rem;
}
.big-stat-label { font-size: .8rem; color: var(--muted); text-transform: uppercase; letter-spacing: .1em; }

/* TABLE */
.calc-table { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }
.calc-table th {
  text-align: left; font-family: 'Poppins', sans-serif; font-size: .72rem;
  text-transform: uppercase; letter-spacing: .12em; color: var(--muted);
  padding: .75rem 1rem; border-bottom: 1px solid var(--border);
}
.calc-table td {
  padding: .9rem 1rem; font-size: .92rem;
  border-bottom: 1px solid rgba(45,55,72,.5);
}
.calc-table tr:last-child td { border-bottom: none; }
.calc-table .total td {
  background: var(--yellow-dim); font-family: 'Poppins', sans-serif;
  font-weight: 600; color: var(--yellow); border-top: 1px solid rgba(247,181,0,.3);
}
.calc-table .green td { color: var(--green); }
.text-right { text-align: right; }
.text-muted { color: var(--muted); }

/* TAGS */
.tag {
  display: inline-block; font-size: .7rem; font-family: 'Poppins', sans-serif;
  font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  padding: .22rem .65rem; border-radius: 4px;
  background: var(--green-dim); color: var(--green);
  border: 1px solid rgba(40,194,68,.2);
}
.tag-yellow {
  background: var(--yellow-dim); color: var(--yellow);
  border-color: rgba(247,181,0,.25);
}

/* INFO BOX */
.info-box {
  background: var(--surface2); border-left: 3px solid var(--yellow);
  border-radius: 0 8px 8px 0; padding: 1.25rem 1.5rem;
  font-size: .88rem; color: var(--muted); line-height: 1.75;
}
.info-box strong { color: var(--text); }

/* CTA SECTION */
.cta-section {
  padding: 80px 5%; text-align: center;
  background: var(--surface); border-top: 1px solid var(--border);
}
.cta-section h2 { margin-bottom: .75rem; }
.cta-section p { color: var(--muted); margin-bottom: 2rem; max-width: 500px; margin-left: auto; margin-right: auto; }
.btn-primary {
  background: var(--yellow); color: #0B1520;
  padding: .8rem 2rem; border-radius: 8px;
  font-family: 'Poppins', sans-serif; font-weight: 600; font-size: .95rem;
  text-decoration: none; display: inline-block; transition: background .2s, transform .15s;
}
.btn-primary:hover { background: #FFD03A; transform: translateY(-2px); }
.btn-ghost {
  border: 1px solid var(--border); color: var(--muted);
  padding: .8rem 2rem; border-radius: 8px;
  font-family: 'Poppins', sans-serif; font-weight: 500; font-size: .95rem;
  text-decoration: none; display: inline-block; transition: all .2s; margin-left: 1rem;
}
.btn-ghost:hover { border-color: var(--muted); color: var(--text); }

/* FOOTER */
footer {
  padding: 3rem 5%;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem;
}
.footer-logo-name {
  font-family: 'Poppins', sans-serif; font-weight: 700;
  color: var(--yellow); font-size: 1.05rem; margin-bottom: .4rem;
}
.footer-tagline { font-size: .8rem; color: var(--muted); line-height: 1.7; max-width: 260px; }
.footer-col h4 {
  font-family: 'Poppins', sans-serif; font-size: .72rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--yellow);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block; color: var(--muted); text-decoration: none;
  font-size: .85rem; margin-bottom: .6rem; transition: color .2s;
}
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  max-width: 1100px; margin: 2.5rem auto 0;
  padding-top: 1.5rem; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 1.5rem; flex-wrap: wrap;
}
.footer-copy { font-size: .78rem; color: var(--muted); }
.footer-disclaimer { font-size: .72rem; color: var(--muted); line-height: 1.6; max-width: 700px; }

/* RESPONSIVE */
@media (max-width: 960px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .nav-links a:not(.nav-cta):nth-child(n+3) { display: none; }
}
@media (max-width: 640px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}