:root {
    --accent1: #38bdf8;
    --accent2: #818cf8;
    --accent3: #34d399;
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.09);
    --panel-bg: rgba(255, 255, 255, 0.03);
}

body {
    min-height: 100vh;
    background: radial-gradient(1200px 600px at 15% -10%, #131a35 0%, transparent 55%),
                radial-gradient(1000px 500px at 100% 0%, #1a1533 0%, transparent 50%),
                linear-gradient(180deg, #0b1020 0%, #090c18 100%);
    background-attachment: fixed;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: #e6e8ef;
}

.bg-glow {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(600px 300px at 50% 0%, rgba(56, 189, 248, 0.12), transparent 70%);
    z-index: 0;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1100px;
}

.accent {
    background: linear-gradient(90deg, var(--accent1), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 20px;
    font-size: 1.7rem;
    color: #fff;
    background: linear-gradient(135deg, var(--accent1), var(--accent2));
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.35);
}

.brand-title {
    font-weight: 800;
    letter-spacing: -0.02em;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    background: linear-gradient(90deg, #e6e8ef, var(--accent1), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.estimate-note {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    max-width: 820px;
    margin-inline: auto;
    padding: 0.85rem 1.1rem;
    border-radius: 14px;
    background: rgba(251, 191, 36, 0.08);
    border: 1px solid rgba(251, 191, 36, 0.25);
    color: #fde9b8;
}

.estimate-note i { color: #fbbf24; margin-top: 0.15rem; }

.hero-card,
.info-card,
.accordion,
.panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 18px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.hero-card {
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

.hero-form { padding: 1.6rem; }

.hero-result {
    padding: 1.6rem;
    background: linear-gradient(180deg, rgba(129, 140, 248, 0.06), rgba(56, 189, 248, 0.03));
    border-left: 1px solid var(--glass-border);
}

@media (max-width: 991.98px) {
    .hero-result { border-left: none; border-top: 1px solid var(--glass-border); }
}

.panel {
    padding: 1rem;
    border-radius: 14px;
}

.info-card { padding: 1.4rem; border-radius: 16px; }

.info-icon {
    font-size: 0.8rem;
    color: #7d8296;
    cursor: help;
    transition: color 0.15s ease;
}
.info-icon:hover, .info-icon:focus { color: var(--accent1); outline: none; }

.hinweis-box {
    padding: 0.6rem 0.8rem;
    border-radius: 12px;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
}

.anker-box {
    padding: 0.55rem 0.85rem;
    border-radius: 12px;
    font-size: 0.9rem;
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.22);
}
.anker-box i { color: var(--accent1); }

.kachel {
    height: 100%;
    padding: 1rem 0.6rem;
    text-align: center;
    border-radius: 16px;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
}

.kachel-icon {
    font-size: 1.3rem;
    width: 42px;
    height: 42px;
    margin: 0 auto 0.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}
.kachel-energie .kachel-icon { color: var(--accent1); background: rgba(56, 189, 248, 0.12); }
.kachel-wasser .kachel-icon { color: #60a5fa; background: rgba(96, 165, 250, 0.12); }
.kachel-co2 .kachel-icon { color: var(--accent3); background: rgba(52, 211, 153, 0.12); }

.kachel-titel {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #9aa0b4;
}

.kachel-wert {
    font-size: clamp(1.4rem, 4vw, 2rem);
    font-weight: 800;
    line-height: 1.1;
    color: #fff;
    text-shadow: 0 0 22px rgba(56, 189, 248, 0.25);
}

.kachel-einheit { font-size: 0.78rem; color: #9aa0b4; }

.kachel-spanne {
    margin-top: 0.35rem;
    font-size: 0.72rem;
    color: #7d8296;
}

.badge-konfidenz {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.82rem;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    color: #cfd3e0;
}

.dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    display: inline-block;
}
.dot-success { background: #34d399; box-shadow: 0 0 8px rgba(52, 211, 153, 0.7); }
.dot-warning { background: #fbbf24; box-shadow: 0 0 8px rgba(251, 191, 36, 0.7); }
.dot-danger { background: #f87171; box-shadow: 0 0 8px rgba(248, 113, 113, 0.7); }

.vergleiche {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
}
.vergleiche li {
    display: flex;
    gap: 0.7rem;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.vergleiche li:last-child { border-bottom: none; }
.vergleiche li i {
    color: var(--accent1);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.formel {
    font-family: ui-monospace, "SFMono-Regular", "Cascadia Code", monospace;
    font-size: 0.86rem;
    padding: 0.6rem 0.8rem;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    color: #d7dbe8;
    overflow-x: auto;
}

.accordion {
    overflow: hidden;
    --bs-accordion-bg: transparent;
    --bs-accordion-color: #e6e8ef;
    --bs-accordion-border-color: var(--glass-border);
    --bs-accordion-btn-color: #e6e8ef;
    --bs-accordion-active-bg: rgba(56, 189, 248, 0.08);
    --bs-accordion-active-color: #fff;
    --bs-accordion-btn-focus-box-shadow: 0 0 0 0.2rem rgba(56, 189, 248, 0.25);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent1);
    box-shadow: 0 0 0 0.2rem rgba(56, 189, 248, 0.2);
}

.nav-pills {
    --bs-nav-pills-link-active-bg: transparent;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.2rem;
}
.nav-pills .nav-link { color: #cfd3e0; border-radius: 10px; }
.nav-pills .nav-link.active {
    color: #fff;
    background: linear-gradient(135deg, var(--accent1), var(--accent2));
}

canvas { max-width: 100%; }