.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    backdrop-filter: blur(1em);
    background: rgba(255, 255, 255, 0.65);
    border-bottom: 0.08em solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    height: 7em;
}

/* Header Layout – volle Breite */
.header-inner {
    width: 100%;
    padding: 1em 2vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo + Text GANZ LINKS */
.logo {
    display: flex;
    align-items: center;
    gap: 0em;
    color: #ffffff;
    transform: translateY(-1.3em);
    cursor: pointer;
}

.logo:hover {
    opacity: 0.95;
}

/* Logo Bild größer */
.logo img {
    width: 8em;
    height: auto;
}

/* Text neben Logo */
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1em;
}

/* Cevio */
.brand-name {
    font-size: 2.2em;
    font-weight: 600;
    color: #111827;
    letter-spacing: 0.04em;
    line-height: 1;
}

/* Slogan */
.brand-slogan {
    font-size: 0.8em;
    font-weight: 400;
    color: #4b5563;
    letter-spacing: 0.06em;
    line-height: 1.25;
    margin-top: 0.5em;
    font-family: system-ui, -apple-system, BlinkMacSystemFont,
                 "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.main-nav {
    position: absolute;
    left: 50%;
    transform: translate(-50%, -1.3em);
    display: flex;
    gap: 2em;
}

.nav-btn {
    position: relative;
    background: none;
    border: none;
    padding: 0.4em 0.2em;
    cursor: pointer;
    color: #1f2937;
    font-size: 1.2em;
    transition:
        color 0.25s ease,
        transform 0.2s ease;
}

.nav-btn::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -0.4em;
    width: 0;
    height: 0.15em;
    transition: width 0.25s ease;
}

.nav-btn:hover {
    color: #000000;
    transform: scale(1.08);
}

.nav-btn:active {
    transform: scale(0.96);
}

.nav-btn:hover::after {
    width: 100%;
}

.lang-switch {
    position: absolute;
    right: 2vw;
    top: 50%;
    transform: translateY(-50%) translateY(-1.3em);
    display: flex;
    align-items: center;
    gap: 0.5em;
    font-size: 0.9em;
}

.lang-btn {
    background: none;
    border: none;
    padding: 0.4em 0.5em;
    cursor: pointer;
    font-size: 0.9em;
    color: #6b7280;
    border-radius: 0.4em;
    transition:
        color 0.2s ease,
        background-color 0.2s ease,
        transform 0.15s ease;
}

.lang-btn:hover {
    color: #111827;
    transform: scale(1.1);
}

.lang-btn:active {
    transform: scale(0.95);
}

.lang-btn.active {
    color: #111827;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.06);
}

.has-arrow {
    position: relative;
    padding-right: 1.6em;
    transition: transform 0.2s ease;
}

.has-arrow:hover {
    transform: scale(1.08);
}

.has-arrow:active {
    transform: scale(0.96);
}

.has-arrow::before {
    content: "▾";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-55%);
    font-size: 1.4em;
    color: currentColor;
    transition: transform 0.25s ease;
}

.has-arrow:hover::before {
    transform: translateY(-45%);
}

.has-arrow.open::before {
    transform: translateY(-55%) rotate(180deg);
}

/* ── START BUTTON – below lang switch ── */
.start-btn {
    position: absolute;
    right: 1.7vw;
    top: 50%;
    transform: translateY(0.4em);

    background: linear-gradient(
        135deg,
        #4f46ff,
        #c026ff
    );
    border: none;
    border-radius: 0.6em;
    padding: 0.5em 1.1em;
    font-size: 1em;
    font-weight: 600;
    color: #ffffff;
    cursor: pointer;
    box-shadow: 0 0.4em 1.2em rgba(79, 70, 255, 0.35);
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.start-btn:hover {
    transform: translateY(0.4em) scale(1.05);
    box-shadow: 0 0.8em 2em rgba(192, 38, 255, 0.45);
}

.start-btn:active {
    transform: translateY(0.4em) scale(0.96);
}

/* ================================
   MEGA MENU
   ================================ */

.leistungen-mega {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100vw;
    padding: 3em 0;
    background: linear-gradient(
        135deg,
        rgb(230, 228, 255),
        rgb(244, 230, 255)
    );
    border-bottom: 0.08em solid rgba(0, 0, 0, 0.08);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-1em);
    transition:
        opacity 0.3s ease,
        transform 0.3s ease;
    z-index: 2000;
}

.leistungen-mega.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.leistungen-inner {
    max-width: 80vw;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 3em;
}

.leistungen-inner button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1em;
    color: #1f2937;
    transition: transform 0.2s ease, color 0.2s ease;
}

.leistungen-inner button:hover {
    transform: scale(1.08);
    color: #000;
}

/* ── Liquid wave top ── */
@keyframes liquid-flow-top {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

.site-header::before {
    content: "";
    position: absolute;
    left: 0;
    top: -0.9em;
    width: 200vw;
    height: 3.4em;
    background: linear-gradient(
        90deg,
        #4f46ff, #7a3cff, #c026ff, #7a3cff, #4f46ff,
        #7a3cff, #c026ff, #7a3cff, #4f46ff
    );
    background-size: 50% 100%;
    mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1080 80' preserveAspectRatio='none'><path d='M0,40 C180,80 360,0 540,40 C720,80 900,0 1080,40 L1080,0 L0,0 Z' /></svg>");
    mask-size: 50% 100%;
    mask-repeat: repeat-x;
    animation: liquid-flow-top 20s linear infinite;
    filter: blur(4px);
    opacity: 0.75;
    pointer-events: none;
}