/* ============================================================
   ET StromFluss GmbH — Shared Components (Phase 4)
   Header/nav, buttons, cards, hero, footer, forms, FAQ, process,
   two-column layout. Loaded by every page.
   ============================================================ */

/* ---- Header & Navigation (see site.js for behavior) ---- */
html, body { overflow-x: hidden; }

.header {
    position: sticky; top: 0; z-index: 60;
    background: rgba(255,255,255,0.92); backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--border);
}
.hdr-in { display: flex; align-items: center; justify-content: space-between; height: var(--hh); gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--dark); }
.logo-svg { width: 30px; height: 30px; flex-shrink: 0; }
.logo-txt { display: flex; flex-direction: column; line-height: 1.15; }
.logo-n { font-size: 1rem; }
.logo-c { font-size: 0.72rem; color: var(--txt3); font-weight: 500; }

.mainnav { display: flex; align-items: center; }
.nav { display: flex; align-items: center; gap: 6px; list-style: none; margin: 0; padding: 0; }
.nav > li { position: relative; }
.nav > li > a, .nav-dd-trigger {
    display: flex; align-items: center; gap: 5px;
    color: var(--txt2); font-weight: 600; font-size: 0.92rem;
    padding: 9px 10px; border-radius: var(--r-sm);
    background: none; border: none; font-family: inherit; cursor: pointer;
}
.nav > li > a:hover, .nav > li > a.act, .nav-dd-trigger:hover, .nav-dd-trigger.act { color: var(--pri); text-decoration: none; }
.nav-dd-trigger:focus-visible, .nav > li > a:focus-visible { outline: 2px solid var(--pri); outline-offset: 2px; }
.dd-caret { transition: transform var(--tf); }
.has-dd.open .dd-caret { transform: rotate(180deg); }

.nav-dd {
    list-style: none; margin: 0; padding: 10px; display: none;
    position: absolute; top: calc(100% + 6px); left: 0; min-width: 240px;
    background: var(--white); border: 1px solid var(--border2); border-radius: var(--r-md);
    box-shadow: var(--sh-lg);
}
.has-dd.open .nav-dd { display: block; }
.nav-dd li a {
    display: block; padding: 9px 10px; border-radius: var(--r-sm);
    color: var(--txt2); font-size: 0.9rem; font-weight: 500;
}
.nav-dd li a:hover { background: var(--pri-light); color: var(--pri); text-decoration: none; }
.nav-dd-all { border-top: 1px solid var(--border2); margin-top: 6px; padding-top: 6px; }
.nav-dd-all a { color: var(--pri) !important; font-weight: 700 !important; }

.hdr-act { display: flex; align-items: center; gap: 12px; }
.hdr-phone { font-weight: 700; color: var(--dark); white-space: nowrap; }

.hamb {
    display: none; flex-direction: column; justify-content: center; align-items: center;
    gap: 5px; width: 40px; height: 40px; border: none; background: none; cursor: pointer;
    border-radius: var(--r-sm); flex-shrink: 0;
}
.hamb span { width: 22px; height: 2px; background: var(--dark); transition: var(--tf); border-radius: 2px; }
.hamb[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamb[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamb[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay { display: none; }

@media (max-width: 900px) {
    .hdr-phone { display: none; }
    .hamb { display: flex; }

    .navpanel {
        position: fixed; top: 0; right: 0; height: 100vh; width: min(320px, 84vw);
        background: var(--white); box-shadow: var(--sh-xl); z-index: 70;
        padding: calc(var(--hh) + 16px) 20px 24px;
        transform: translateX(100%);
        transition: transform var(--ts);
        overflow-y: auto;
    }
    .navpanel.open { transform: translateX(0); }

    .nav { flex-direction: column; align-items: stretch; gap: 2px; }
    .nav > li > a, .nav-dd-trigger { width: 100%; justify-content: space-between; padding: 13px 10px; font-size: 1rem; }
    .nav-dd {
        position: static; box-shadow: none; border: none; background: var(--bg2);
        margin-top: 2px; display: none; min-width: 0;
    }
    .has-dd.open .nav-dd { display: block; }

    .nav-overlay {
        display: block; position: fixed; inset: 0; background: rgba(12,20,36,0.35);
        z-index: 65; opacity: 0; pointer-events: none; transition: opacity var(--ts);
    }
    .nav-overlay.open { opacity: 1; pointer-events: auto; }
}

@media (max-width: 340px) {
    .hdr-act .btn-sm { padding: 8px 12px; font-size: 0.78rem; }
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 20px; border-radius: var(--r-full); font-weight: 700; font-size: 0.92rem;
    border: 2px solid transparent; cursor: pointer; transition: var(--tf); white-space: nowrap;
}
.btn-pr { background: var(--pri); color: #fff; }
.btn-pr:hover { background: var(--pri-dark); text-decoration: none; }
.btn-out { border-color: var(--pri); color: var(--pri); background: transparent; }
.btn-out:hover { background: var(--pri-light); text-decoration: none; }
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }
.btn-lg { padding: 15px 26px; font-size: 1rem; }

/* ---- Breadcrumbs ---- */
.crumbs { font-size: 0.85rem; color: var(--txt3); padding: 18px 0 0; }
.crumbs a { color: var(--txt3); }
.crumbs a:hover { color: var(--pri); }
.crumbs span[aria-current] { color: var(--txt2); font-weight: 600; }

/* ---- Page hero ---- */
.page-hero { padding: 28px 0 40px; }
.page-hero .lbl {
    display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.03em;
    text-transform: uppercase; color: var(--pri); background: var(--pri-light);
    padding: 5px 12px; border-radius: var(--r-full); margin-bottom: 14px;
}
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.2; margin: 0 0 14px; }
.page-hero .lead { font-size: 1.08rem; color: var(--txt2); max-width: 780px; margin: 0 0 20px; }
.page-hero .cta-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---- Content sections ---- */
.sec { padding: 40px 0; }
.sec.bg-w { background: var(--white); }
.sec-hd h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin: 0 0 8px; }
.sec-hd p { color: var(--txt2); max-width: 720px; }
.sec-hd .lbl {
    display: inline-block; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.03em;
    text-transform: uppercase; color: var(--pri); margin-bottom: 8px;
}
.prose p { margin: 0 0 14px; color: var(--txt2); }
.prose ul { margin: 0 0 14px; padding-left: 1.2em; color: var(--txt2); }
.prose li { margin-bottom: 6px; }

/* ---- Two-column layout (page-type variety) ---- */
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 36px; align-items: start; }
.split.reverse { grid-template-columns: 0.9fr 1.1fr; }
.split.reverse > *:first-child { order: 2; }
@media (max-width: 860px) {
    .split, .split.reverse { grid-template-columns: 1fr; }
    .split.reverse > *:first-child { order: 0; }
}

/* ---- Card grid ---- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 22px; }
.card {
    background: var(--white); border: 1px solid var(--border2); border-radius: var(--r-md);
    padding: 22px; box-shadow: var(--sh-sm); transition: var(--tf);
}
.card:hover { box-shadow: var(--sh-md); }
.card h3 { font-size: 1.08rem; margin: 0 0 8px; }
.card p { color: var(--txt2); font-size: 0.92rem; margin: 0 0 12px; }
.card ul { padding-left: 1.1em; color: var(--txt2); font-size: 0.9rem; margin: 0 0 12px; }

/* ---- Compact service list (alternative to card grid) ---- */
.svc-list { list-style: none; margin: 22px 0 0; padding: 0; border-top: 1px solid var(--border2); }
.svc-list li {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 16px 4px; border-bottom: 1px solid var(--border2);
}
.svc-list li h3 { font-size: 1rem; margin: 0 0 2px; }
.svc-list li p { font-size: 0.85rem; color: var(--txt3); margin: 0; }
.svc-list li .btn { flex-shrink: 0; }

/* ---- Process / timeline ---- */
.steps-row { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; position: relative; }
.step { flex: 1; text-align: center; position: relative; z-index: 1; }
.step-num {
    width: 40px; height: 40px; border-radius: 50%; background: var(--pri); color: #fff;
    display: flex; align-items: center; justify-content: center; font-weight: 700;
    margin: 0 auto 10px; box-shadow: var(--sh-sm);
}
.step h3 { font-size: 0.94rem; margin: 0 0 4px; }
.step p { font-size: 0.82rem; color: var(--txt2); margin: 0; }
@media (max-width: 760px) {
    .steps-row { flex-direction: column; gap: 20px; }
    .steps-row .step-line { display: none; }
    .step { display: flex; align-items: flex-start; gap: 14px; text-align: left; }
    .step-num { margin: 0; flex-shrink: 0; }
}

/* ---- FAQ (accordion, native <details>) ---- */
.faq { margin-top: 20px; }
.faq details {
    border: 1px solid var(--border2); border-radius: var(--r-md); padding: 4px 18px;
    margin-bottom: 10px; background: var(--white);
}
.faq summary {
    cursor: pointer; padding: 14px 0; font-weight: 700; color: var(--dark);
    list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.3rem; color: var(--pri); font-weight: 400; flex-shrink: 0; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 0 0 16px; color: var(--txt2); font-size: 0.94rem; }

/* ---- Note / disclaimer box ---- */
.note-box {
    background: var(--pri-light); border: 1px solid var(--border); border-radius: var(--r-md);
    padding: 18px 20px; margin: 20px 0; font-size: 0.92rem; color: var(--txt2);
}
.note-box strong { color: var(--dark); }

/* ---- CTA band ---- */
.cta-band { background: var(--dark); color: #fff; padding: 44px 0; text-align: center; }
.cta-band h2 { color: #fff; margin: 0 0 10px; }
.cta-band p { color: #c7cede; margin: 0 0 20px; }
.cta-band .cta-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }

/* ---- Region grid / map box ---- */
.region-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-top: 20px; }
.region-card { background: var(--white); border: 1px solid var(--border2); border-radius: var(--r-md); padding: 18px; }
.region-card h3 { font-size: 1rem; margin: 0 0 6px; }
.region-card p { font-size: 0.86rem; color: var(--txt2); margin: 0; }
.map-box {
    border-radius: var(--r-md); overflow: hidden; border: 1px solid var(--border2);
    aspect-ratio: 4/3; background: var(--bg2); display: flex; align-items: center; justify-content: center;
    color: var(--txt3); font-size: 0.85rem; text-align: center; padding: 20px;
}

/* ---- Forms ---- */
.cform-page { background: var(--white); border: 1px solid var(--border2); border-radius: var(--r-lg); padding: 26px; box-shadow: var(--sh-sm); }
.cform-page .fg { margin-bottom: 14px; }
.cform-page label { display: block; font-size: 0.86rem; font-weight: 600; color: var(--txt2); margin-bottom: 5px; }
.cform-page input, .cform-page textarea, .cform-page select {
    width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: var(--r-sm); font: inherit;
}
.cform-page textarea { min-height: 120px; resize: vertical; }
.result-panel { display: none; background: var(--white); border: 1px solid var(--border2); border-radius: var(--r-lg); padding: 26px; text-align: center; }

/* ---- Footer ---- */
.footer { background: var(--white); border-top: 1px solid var(--border); padding: 40px 0 0; margin-top: 40px; }
.footer h4 { font-size: 0.84rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--txt3); margin: 0 0 10px; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 6px; font-size: 0.9rem; }
.footer a { color: var(--txt2); }
.footer-g { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: clamp(14px, 2vw, 24px); margin-bottom: 20px; padding-top: 30px; }
.footer-g > div:first-child { grid-column: span 2; min-width: 220px; }
.footer-b { border-top: 1px solid var(--border2); padding: 16px 0; font-size: 0.76rem; color: var(--txt3); text-align: center; }
address { font-style: normal; }
@media (max-width: 480px) { .footer-g > div:first-child { grid-column: span 1; } }
@media (max-width: 430px) {
    .footer-g { grid-template-columns: 1fr; }
    .page-hero .cta-row, .cta-band .cta-row { flex-direction: column; align-items: stretch; }
    .btn { width: 100%; }
}

/* ---- Mobile sticky action bar ---- */
.mob-bar {
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
    display: none; gap: 8px; padding: 10px 14px; background: #fff;
    border-top: 1px solid var(--border); box-shadow: 0 -4px 14px rgba(12,20,36,0.06);
}
@media (max-width: 640px) {
    .mob-bar { display: flex; }
    body { padding-bottom: 64px; }
}