#intro {
    --intro-accent: #ff6b6b;
    --intro-color-bg: #1b1f22;
    --intro-color-fg: #ffffff;
    --intro-color-fg-secondary: rgba(255, 255, 255, 0.5);
    --intro-color-rule: rgba(255, 255, 255, 0.075);
    --intro-color-selected: rgba(255, 255, 255, 0.175);
    --intro-radius: 4px;
    --intro-transition: 0.2s ease-in-out;
    width: 72rem !important;
    max-height: 90vh;
    max-height: 90dvh;
    overflow: hidden;
}

#intro > #intro-title {
    flex: 0 0 auto;
}

#intro .intro-catalog {
    position: relative;
    display: grid;
    grid-template-columns: 15rem minmax(0, 1fr);
    min-height: 0;
    max-height: calc(90vh - 10rem);
    max-height: calc(90dvh - 10rem);
    border: 1px solid var(--intro-color-rule);
    border-radius: var(--intro-radius);
    overflow: hidden;
}

#intro .intro-tabs {
    display: flex;
    flex-direction: column;
    min-width: 0;
    padding: 0.5rem;
    border-right: 1px solid var(--intro-color-rule);
    overflow-y: auto;
    overscroll-behavior: contain;
}

#intro .intro-tab {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: 44px;
    margin: 0;
    padding: 0.75rem 1rem;
    border: 0;
    border-left: 4px solid transparent;
    border-radius: var(--intro-radius);
    background: transparent;
    color: var(--intro-color-fg-secondary);
    font-family: "Source Sans Pro", sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.2rem;
    line-height: 1.5;
    text-align: left;
    text-transform: uppercase;
    cursor: pointer;
    transition: color var(--intro-transition), background-color var(--intro-transition), border-color var(--intro-transition);
}

#intro .intro-tab:hover {
    background-color: var(--intro-color-rule);
    color: var(--intro-color-fg);
}

#intro .intro-tab.active,
#intro .intro-tab[aria-selected="true"] {
    border-left-color: var(--intro-accent);
    background-color: var(--intro-color-selected);
    color: var(--intro-color-fg);
}

#intro .intro-tab:focus-visible,
#intro .intro-panel__cta:focus-visible {
    outline: 2px solid var(--intro-color-fg);
    outline-offset: 2px;
}

#intro .intro-tab .icon {
    flex: 0 0 1.25rem;
    width: 1.25rem;
    color: currentColor;
    text-align: center;
}

#intro .intro-tabs__scroll-cue {
    display: none;
}

#intro .intro-panels {
    min-width: 0;
    min-height: 0;
    padding: 2rem 2.5rem 2.5rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
}

#intro.intro-enhanced .intro-panel:not(.active),
#intro .intro-panel[hidden] {
    display: none;
}

#intro .intro-panel {
    max-width: 65ch;
    margin: 0 auto;
    animation: intro-panel-reveal 0.2s ease-in-out;
}

#intro .intro-panel__heading {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

#intro .intro-panel__heading > .icon {
    flex: 0 0 2.75rem;
    display: grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    border: 1px solid var(--intro-color-rule);
    border-radius: var(--intro-radius);
    color: var(--intro-color-fg);
}

#intro .intro-panel__heading > h3.major {
    margin: 0;
}

#intro .intro-panel h4.major {
    margin-top: 2.5rem;
}

#intro .intro-no-wrap {
    white-space: nowrap;
}

#intro .intro-phrase,
#game-select .intro-phrase {
    white-space: nowrap;
}

#intro .intro-panel p {
    max-width: 65ch;
    text-wrap: pretty;
}

#intro .intro-panel ul {
    margin: 0 0 2rem;
    padding: 0;
    list-style: none;
}

#intro .intro-panel li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--intro-color-rule);
}

#intro .intro-panel li:last-child {
    border-bottom: 0;
}

#intro .intro-panel li > .icon {
    flex: 0 0 1.25rem;
    width: 1.25rem;
    padding-top: 0.25rem;
    color: var(--intro-color-fg-secondary);
    text-align: center;
}

#intro .intro-panel__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    margin: 0.5rem 0 2rem;
}

@keyframes intro-panel-reveal {
    from {
        opacity: 0;
        transform: translateY(0.25rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media screen and (min-width: 981px) {
    #intro .intro-catalog {
        height: calc(90vh - 10rem);
        height: calc(90dvh - 10rem);
    }
}

@media screen and (max-width: 980px) {
    #intro {
        width: 90vw !important;
        max-width: 40rem;
    }

    #intro .intro-catalog {
        grid-template-columns: minmax(0, 1fr) 3.5rem;
        grid-template-rows: auto minmax(0, 1fr);
    }

    #intro .intro-tabs {
        grid-column: 1;
        grid-row: 1;
        flex-direction: row;
        padding: 0.5rem;
        border-right: 0;
        border-bottom: 1px solid var(--intro-color-rule);
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-color: var(--intro-color-selected) transparent;
        scrollbar-width: auto;
    }

    #intro .intro-tabs__scroll-cue {
        grid-column: 2;
        grid-row: 1;
        display: grid;
        place-items: center;
        border-left: 1px solid var(--intro-color-rule);
        border-bottom: 1px solid var(--intro-color-rule);
        border-radius: var(--intro-radius);
        background-color: var(--intro-color-bg);
        color: var(--intro-color-fg);
        pointer-events: none;
    }

    #intro .intro-tabs__scroll-cue[hidden] {
        display: none;
    }

    #intro .intro-tabs::-webkit-scrollbar {
        height: 0.5rem;
    }

    #intro .intro-tabs::-webkit-scrollbar-track {
        background: transparent;
    }

    #intro .intro-tabs::-webkit-scrollbar-thumb {
        border-radius: var(--intro-radius);
        background-color: var(--intro-color-selected);
    }

    #intro .intro-tab {
        flex: 0 0 auto;
        border-left: 0;
        border-bottom: 4px solid transparent;
        white-space: nowrap;
    }

    #intro .intro-tab.active,
    #intro .intro-tab[aria-selected="true"] {
        border-bottom-color: var(--intro-accent);
    }

    #intro .intro-panels {
        grid-column: 1 / -1;
        grid-row: 2;
        padding: 2rem;
    }
}

@media screen and (max-width: 736px) {
    #intro {
        width: calc(100vw - 2rem) !important;
        max-width: none;
        max-height: calc(100vh - 2rem);
        max-height: calc(100dvh - 2rem);
    }

    #intro .intro-catalog {
        max-height: calc(100vh - 9rem);
        max-height: calc(100dvh - 9rem);
    }

    #intro .intro-panels {
        padding: 1.5rem;
    }
}

@media screen and (max-width: 480px) {
    #intro .intro-tab {
        max-width: 100%;
        white-space: normal;
    }

    #intro .intro-tab > span:last-child {
        min-width: 0;
    }

    #intro .intro-panels {
        padding: 1.25rem 1rem 1.5rem;
    }

    #intro .intro-panel__heading {
        gap: 0.75rem;
    }

    #intro .intro-panel__heading > .icon {
        flex-basis: 2.75rem;
    }

    #intro .intro-panel__cta {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    #intro .intro-tab,
    #intro .intro-panel {
        animation: none;
        transition: none;
    }
}