/* RS Office Products GmbH - Bildhoster One-Pager */
/* Farbpalette: #94cbd4, #68a9b9, Weiss, schwarze Schrift */
/* Effekt: fixe Hintergrundbilder, transparente Bildbereiche, opake Kategorie-Header */

:root {
    --farbe-hell: #94cbd4;
    --farbe-akzent: #68a9b9;
    --farbe-weiss: #ffffff;
    --farbe-text: #000000;
    --farbe-overlay: rgba(255, 255, 255, 0.92);
    --schatten: 0 10px 30px rgba(0,0,0,0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--farbe-weiss);
    color: var(--farbe-text);
    line-height: 1.5;
}

.kategorien-leiste {
    position: sticky;
    top: 0;
    z-index: 300;
    width: 100%;
    background: rgba(148, 203, 212, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 14px 30px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.kategorien-leiste > ul,
.kategorien-leiste .navigation-kategorien > ul {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.kategorien-leiste > ul {
    justify-content: space-between;
    gap: 14px;
    max-width: 1400px;
    margin: 0 auto;
}

.kategorien-leiste .navigation-kategorien > ul {
    justify-content: flex-end;
    gap: 14px;
}

.kategorien-leiste a {
    display: inline-block;
    padding: 9px 20px;
    background: var(--farbe-weiss);
    color: var(--farbe-text);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, background 0.2s ease;
}

.kategorien-leiste a:hover {
    background: var(--farbe-hell);
    transform: translateY(-2px);
}

.hero {
    position: relative;
    top: 0;
    z-index: 150;
    background: transparent;
    padding: 32px 30px 24px;
    text-align: left;
    box-shadow: none;
}

.hero-inner {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 24px;
    flex-wrap: wrap;
    max-width: 1400px;
    margin: 0 auto;
    background: transparent;
}

.hero-klein {
    padding: 28px 20px 22px;
}

.hero-marke {
    width: 100%;
    flex: 1 1 100%;
    text-align: left;
    background: transparent;
}

.hero-marke h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
    color: var(--farbe-text);
    text-shadow: 0 2px 8px rgba(255,255,255,0.45);
}

.hero-marke p {
    font-size: 1rem;
    color: var(--farbe-text);
    opacity: 0.88;
    max-width: none;
    margin: 0;
    text-shadow: 0 1px 6px rgba(255,255,255,0.35);
}

.hero-inner h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
    color: var(--farbe-text);
    text-shadow: 0 2px 8px rgba(255,255,255,0.45);
}

.hero-inner > p {
    font-size: 1rem;
    color: var(--farbe-text);
    opacity: 0.88;
    max-width: 760px;
    margin: 0 auto;
    text-shadow: 0 1px 6px rgba(255,255,255,0.35);
    text-align: center;
    flex-basis: 100%;
}

.zurueck-link {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--farbe-text);
    text-decoration: none;
    font-weight: 600;
}

.zurueck-link:hover {
    text-decoration: underline;
}

main {
    position: relative;
}

.kategorie-sektion {
    position: relative;
    min-height: 100vh;
    background-attachment: fixed;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding: 0;
}

#bodenschutzmatten {
    background-image: linear-gradient(rgba(148, 203, 212, 0.18), rgba(148, 203, 212, 0.18)), url('http://www.bodenschutzmatten.net/BSM.jpg');
}

#tischmatten {
    background-image: linear-gradient(rgba(148, 203, 212, 0.16), rgba(148, 203, 212, 0.16)), url('http://www.bodenschutzmatten.net/TiMa.jpg');
}

#antistatikmatten {
    background-image: linear-gradient(rgba(148, 203, 212, 0.16), rgba(148, 203, 212, 0.16)), url('http://www.bodenschutzmatten.net/ESD.jpg');
}

#datenblaetter {
    background-image: linear-gradient(rgba(148, 203, 212, 0.16), rgba(148, 203, 212, 0.16)), url('http://www.bodenschutzmatten.net/DB.jpg');
}

.kategorie-header {
    position: sticky;
    top: 122px;
    z-index: 20;
    width: 100%;
    padding: 26px 20px;
    background: var(--farbe-overlay);
    backdrop-filter: blur(6px);
    border-top: 3px solid var(--farbe-akzent);
    border-bottom: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    text-align: center;
}

.kategorie-header h2 {
    font-size: 2rem;
    color: var(--farbe-text);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.unterkategorien-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 185px 30px 80px;
}

.unterkategorie-karte {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 360px;
    padding: 26px;
    color: var(--farbe-text);
    text-decoration: none;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--schatten);
    border: 1px solid rgba(255,255,255,0.28);
    background: linear-gradient(to top, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.62) 38%, rgba(255,255,255,0.08) 100%);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.unterkategorie-karte::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.16), rgba(0,0,0,0.02));
    z-index: 0;
}

.unterkategorie-karte > * {
    position: relative;
    z-index: 1;
}

.unterkategorie-karte:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 36px rgba(0,0,0,0.22);
}

.unterkategorie-name {
    font-size: 1.45rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.unterkategorie-anzahl {
    margin-top: 6px;
    font-size: 0.95rem;
    font-weight: 600;
}

.unterkategorie-kopf {
    width: 100%;
    margin-bottom: 36px;
    padding: 26px 20px;
    background: var(--farbe-overlay);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-top: 3px solid var(--farbe-akzent);
    border-bottom: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.unterkategorie-kopf-inhalt {
    max-width: 1400px;
    margin: 0 auto;
}

.unterkategorie-kopf h2 {
    margin: 4px 0 8px;
    font-size: 2rem;
    color: var(--farbe-text);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.unterkategorie-kopf p {
    margin: 0;
}

.unterkategorie-kopf .zurueck-link {
    margin-bottom: 0;
}

.bilduebersicht-sektion {
    min-height: auto;
    padding: 36px 20px 70px;
    background: transparent;
}

.auswahl-leiste {
    max-width: 1400px;
    margin: 0 auto 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding: 16px 20px;
    background: var(--farbe-overlay);
    backdrop-filter: blur(6px);
    border-radius: 12px;
    box-shadow: 0 6px 22px rgba(0,0,0,0.08);
}

.alle-auswaehlen {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    cursor: pointer;
}

.alle-auswaehlen input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.download-sammel-button {
    padding: 12px 28px;
    background: var(--farbe-akzent);
    color: var(--farbe-weiss);
    font-weight: 700;
    border-radius: 10px;
    letter-spacing: 0.3px;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.download-sammel-button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.download-sammel-button:not(:disabled):hover {
    transform: translateY(-2px);
}

.bilder-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.bild-kachel {
    position: relative;
    display: flex;
    flex-direction: column;
    border-radius: 16px;
    overflow: hidden;
    background: transparent;
    box-shadow: var(--schatten);
}

.bild-checkbox-label {
    position: relative;
    display: block;
    aspect-ratio: 4/3;
    cursor: pointer;
    overflow: hidden;
    background: transparent;
}

.bild-checkbox-label img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease, filter 0.3s ease;
}

.bild-checkbox-label:hover img {
    transform: scale(1.05);
}

.bild-checkbox {
    position: absolute;
    top: 14px;
    left: 14px;
    width: 26px;
    height: 26px;
    opacity: 0;
    cursor: pointer;
    z-index: 3;
}

.checkbox-haken {
    position: absolute;
    top: 14px;
    left: 14px;
    width: 26px;
    height: 26px;
    background: rgba(255,255,255,0.96);
    border: 2px solid var(--farbe-akzent);
    border-radius: 7px;
    z-index: 2;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.bild-checkbox:checked ~ .checkbox-haken {
    background: var(--farbe-akzent);
    border-color: var(--farbe-akzent);
}

.bild-checkbox:checked ~ .checkbox-haken::after {
    content: "";
    position: absolute;
    left: 8px;
    top: 4px;
    width: 6px;
    height: 12px;
    border: solid var(--farbe-weiss);
    border-width: 0 3px 3px 0;
    transform: rotate(45deg);
}

.einzel-download-link {
    display: block;
    text-align: center;
    padding: 12px 0;
    background: var(--farbe-overlay);
    backdrop-filter: blur(6px);
    color: var(--farbe-text);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: background 0.2s ease;
}

.einzel-download-link:hover {
    background: rgba(148, 203, 212, 0.95);
}

.bild-dateiname {
    position: absolute;
    right: 0;
    bottom: 44px;
    left: 0;
    z-index: 4;
    overflow: hidden;
    padding: 10px 12px;
    margin: 0;
    background: rgba(255, 255, 255, 0.92);
    color: var(--farbe-text);
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.35;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.bild-kachel:hover .bild-dateiname,
.bild-kachel:focus-within .bild-dateiname {
    opacity: 1;
    transform: translateY(0);
}

.keine-bilder {
    grid-column: 1 / -1;
    text-align: center;
    background: var(--farbe-overlay);
    padding: 26px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}

.impressum-unterkategorie {
    position: relative;
    z-index: 10;
    margin-top: 50px;
    background: rgba(148, 203, 212, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--farbe-text);
    padding: 30px 30px 24px;
    font-size: 0.85rem;
}

.impressum {
    position: relative;
    z-index: 10;
    margin-top: -180px;
    background: rgba(148, 203, 212, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--farbe-text);
    padding: 30px 30px 24px;
    font-size: 0.85rem;
}

.impressum-spalten {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.impressum-spalte h3 {
    color: var(--farbe-text);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.impressum-spalte p {
    margin-bottom: 10px;
}

.impressum .copyright {
    max-width: 1400px;
    margin: 30px auto 0;
    opacity: 0.75;
}

@media (max-width: 1100px) {
    .bilder-grid,
    .unterkategorien-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .impressum-spalten {
    grid-template-columns: repeat(2, 1fr);
    }
}

.button-text-kurz {
    display: none;
}

/* Navigation: mittlere Bildschirmbreiten */
@media (max-width: 1000px) {
    .kategorien-leiste {
        padding: 10px 16px;
        overflow-x: auto;
    }

    .kategorien-leiste > ul,
    .kategorien-leiste .navigation-kategorien > ul {
        flex-wrap: nowrap;
        gap: clamp(4px, 0.8vw, 10px);
    }

    .kategorien-leiste > ul {
        min-width: max-content;
    }

    .kategorien-leiste a {
        padding: clamp(5px, 0.7vw, 8px) clamp(6px, 1vw, 14px);
        font-size: clamp(0.66rem, 1.05vw, 0.9rem);
        white-space: nowrap;
    }
}

/* Navigation: Smartphone */
@media (max-width: 700px) {
    .kategorien-leiste {
        padding: 8px 10px;
    }

    .kategorien-leiste > ul,
    .kategorien-leiste .navigation-kategorien > ul {
        gap: 4px;
    }

    .kategorien-leiste a {
        min-height: 34px;
        padding: 5px 8px;
        font-size: 1.10rem;
    }

    .button-text-lang {
        display: none;
    }

    .button-text-kurz {
        display: inline;
    }
}

/* Allgemeine Anpassungen für kleinere Bildschirme */
@media (max-width: 900px) {
    .kategorie-header {
        top: 138px;
    }
}

@media (max-width: 800px) {
    .kategorien-leiste > ul {
        justify-content: space-between;
    }

    .kategorien-leiste .navigation-kategorien > ul {
        justify-content: flex-end;
    }

    .hero-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Smartphone im Hochformat */
@media (max-width: 700px) {
    .bilder-grid,
    .unterkategorien-grid {
        grid-template-columns: 1fr;
    }

    .unterkategorien-grid {
        padding: 155px 15px 60px;
    }

    .hero-inner h1 {
        font-size: 1.65rem;
    }

    .kategorie-header {
        top: 74px;
        padding: 16px 15px;
    }

    .kategorie-header h2 {
        font-size: 1.35rem;
    }

    .auswahl-leiste {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .unterkategorie-karte {
        min-height: 280px;
    }

    .impressum {
        margin-top: -90px;
    }

    .impressum-spalten {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* Smartphone im Querformat */
@media (max-width: 900px) and (orientation: landscape) {
    .kategorie-header {
        top: 54px;
        padding: 8px 12px;
        border-top-width: 2px;
    }

    .kategorie-header h2 {
        font-size: 1rem;
        letter-spacing: 0.5px;
    }

    .unterkategorien-grid {
        padding-top: 105px;
    }
}

/* Feste Hintergrundbilder auf Mobilgeräten deaktivieren */
@media (max-width: 700px), (prefers-reduced-motion: reduce) {
    .kategorie-sektion {
        background-attachment: scroll;
    }
}