* {
    box-sizing: border-box;
}

:root {
    --card-background: rgba(160, 171, 165, 0.97);
    --border-color: #070908;
    --text-color: #101210;
    --muted-text: #354039;
    --accent-background: #2f3733;
    --tooltip-background: #202723;
    --tooltip-text: #ffffff;
    --page-width: 1180px;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--text-color);
    font-family: Arial, Helvetica, sans-serif;

    background:
        linear-gradient(
            rgba(242, 230, 172, 0.24),
            rgba(17, 23, 20, 0.22)
        ),
        url("/images/background/Zugschiene-1500px.jpg")
        center top / cover fixed no-repeat;
}

button {
    font: inherit;
}

img {
    display: block;
    max-width: 100%;
}

.page-content {
    width: min(var(--page-width), calc(100% - 40px));
    margin: 0 auto;
    padding: 42px 0 65px;
}

.page-heading {
    margin-bottom: 28px;
    padding: 27px 34px;

    background:
        linear-gradient(
            90deg,
            rgba(251, 246, 209, 0.94),
            rgba(240, 230, 170, 0.84)
        );

    border-left: 7px solid #4f5d55;
    border-radius: 11px;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
}

.page-eyebrow {
    margin: 0 0 6px;
    color: var(--muted-text);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.page-heading h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.05;
}

.page-description {
    margin: 9px 0 0;
    font-weight: 600;
}

.translation-information {
    width: fit-content;
    margin-top: 18px;
    padding: 9px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
    background: rgba(65, 77, 70, 0.9);
    border-radius: 7px;
    font-size: 0.86rem;
    line-height: 1.4;
}

.signal-list {
    display: grid;
    gap: 20px;
}

.signal-card {
    min-height: 230px;
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    overflow: visible;
    background: var(--card-background);
    border: 5px solid var(--border-color);
    border-radius: 18px;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.25);
}

.signal-image-area {
    min-height: 220px;
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;

    background:
        linear-gradient(
            145deg,
            rgba(205, 214, 208, 0.76),
            rgba(159, 173, 165, 0.86)
        );

    border-right: 2px solid rgba(0, 0, 0, 0.15);
    border-radius: 13px 0 0 13px;
}

.signal-image {
    width: auto;
    max-width: 145px;
    max-height: 175px;
    object-fit: contain;
    filter: drop-shadow(0 5px 4px rgba(0, 0, 0, 0.18));
}

.signal-image-pair {
    gap: 16px;
}

.signal-image-small {
    max-width: 105px;
    max-height: 155px;
}

.signal-content {
    min-width: 0;
    padding: 30px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.signal-number {
    margin-bottom: 9px;
    padding: 7px 11px;
    color: #ffffff;
    background: var(--accent-background);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.signal-content h2 {
    margin: 0 0 24px;
    font-size: clamp(1.55rem, 2.3vw, 2.15rem);
    line-height: 1.12;
}

.signal-meaning {
    width: 100%;
    padding-top: 18px;
    border-top: 2px solid rgba(0, 0, 0, 0.17);
}

.signal-meaning h3 {
    margin: 0 0 7px;
    color: var(--muted-text);
    font-size: 0.79rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.translation-trigger {
    position: relative;
    width: 100%;
    padding: 8px 46px 8px 10px;
    display: block;
    color: var(--text-color);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid transparent;
    border-radius: 7px;
    text-align: left;
    cursor: help;

    transition:
        background-color 160ms ease,
        border-color 160ms ease;
}

.translation-trigger:hover,
.translation-trigger:focus-visible,
.translation-trigger.tooltip-open {
    background: rgba(255, 255, 255, 0.33);
    border-color: rgba(0, 0, 0, 0.18);
}

.original-text {
    display: block;
    font-size: 1.04rem;
    line-height: 1.55;
}

.translation-icon {
    position: absolute;
    top: 50%;
    right: 13px;
    transform: translateY(-50%);
    font-size: 1.15rem;
}

.translation-tooltip {
    position: absolute;
    left: 12px;
    bottom: calc(100% + 13px);
    z-index: 100;
    width: min(430px, calc(100vw - 55px));
    padding: 16px 18px;
    display: none;
    color: var(--tooltip-text);
    background: var(--tooltip-background);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 10px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.36);
}

.translation-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 28px;
    border: 8px solid transparent;
    border-top-color: var(--tooltip-background);
}

.translation-trigger:hover .translation-tooltip,
.translation-trigger:focus-visible .translation-tooltip,
.translation-trigger.tooltip-open .translation-tooltip {
    display: block;
}

.tooltip-language {
    display: block;
    margin-bottom: 7px;
    color: rgba(255, 255, 255, 0.68);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.tooltip-text {
    display: block;
    font-size: 1rem;
    line-height: 1.5;
}

@media (max-width: 1024px) {
    .page-content {
        width: min(100% - 30px, 900px);
    }

    .signal-card {
        grid-template-columns: 210px minmax(0, 1fr);
    }

    .signal-image-area {
        padding: 20px;
    }

    .signal-content {
        padding: 26px 28px;
    }
}

@media (max-width: 650px) {
    body {
        background-attachment: scroll;
    }

    .page-content {
        width: calc(100% - 20px);
        padding-top: 22px;
    }

    .page-heading {
        padding: 21px 19px;
    }

    .translation-information {
        width: 100%;
    }

    .signal-card {
        grid-template-columns: 1fr;
        border-width: 4px;
        border-radius: 14px;
    }

    .signal-image-area {
        min-height: 200px;
        border-right: 0;
        border-bottom: 2px solid rgba(0, 0, 0, 0.16);
        border-radius: 10px 10px 0 0;
    }

    .signal-content {
        padding: 22px;
    }

    .translation-tooltip {
        position: fixed;
        right: 14px;
        bottom: 18px;
        left: 14px;
        z-index: 2000;
        width: auto;
    }

    .translation-tooltip::after {
        display: none;
    }
}