:root,
:root[data-theme="light"] {
    /* Colors */
    --bg-color: #dad2c6;
    --surface-color: #c8Bfb1;
    --surface-high-color: #b4aa9B;
    --surface-text-color: #121110;
    --accent-color: #9e0b10;
    --border-color: #a3998a;
    --text-color: #121110;
    --shadow-color: #a3998a;
    --button-bg: var(--surface-color);
    --seg-ctrl-bg-active: var(--surface-color);

    /* 3-Column Grid Layout Sizing */
    --side-col-min-width: 260px;
    --center-col-min-width: 540px;
    --center-col-max-width: 1100px;
    --grid-gap: 32px;

    /* Card Grid Sizing */
    --album-grid-card-min-width: 180px;
    --artist-grid-card-min-width: 280px;

    /* Album Detail View Sizing */
    --album-detail-cover-size: 220px;

    /* Header & Branding Sizing */
    --header-inner-height: 56px;
    --header-action-size: 28px;
    --logo-size-desktop: 96px;
    --logo-size-mobile: 96px;

    /* Components & Queue Sizing */
    --search-margin-bottom: 32px;
    --search-loading-bar-height: 2px;
}

:root[data-theme="dark"] {
    --bg-color: #121110;
    --surface-color: #1d1b18;
    --surface-high-color: #2a2723;
    --surface-text-color: #e6dfd5;
    --accent-color: #c92a30;
    --border-color: #38342f;
    --text-color: #e6dfd5;
    --shadow-color: #000000;
    --button-bg: var(--surface-color);
    --seg-ctrl-bg-active: var(--surface-high-color);
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.4;
    position: relative;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border-radius: 0 !important;

    &:focus-visible {
        outline: 1px solid var(--accent-color);
        outline-offset: 2px;
    }
}

.app-layout-grid {
    display: grid;
    grid-template-columns: minmax(var(--side-col-min-width), 1fr) minmax(var(--center-col-min-width), var(--center-col-max-width)) minmax(var(--side-col-min-width), 1fr);
    gap: var(--grid-gap);
}

.left-column {
    position: sticky;
    top: 0;
    padding: max(32px, env(safe-area-inset-top)) 0 0 24px;
    height: 100dvh;
}

.app-brand {
    width: var(--logo-size-desktop);
    height: var(--logo-size-desktop);
    background-color: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;

    & .app-brand-text {
        font-weight: 800;
        font-size: 0.85rem;
        line-height: 1;
        white-space: nowrap;
        transform: translate(6px, 10px);
    }

    &:hover {
        opacity: 0.9;
    }
}

.center-column {
    min-width: 0;
    width: 100%;
    padding-block-end: 32px;
}

.app-header {
    & .app-header-inner {
        block-size: var(--header-inner-height);
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    & .app-header-nav {
        display: flex;
        align-items: center;
        gap: 13px;

        .btn-nav {
            block-size: var(--header-action-size);
            font-size: 0.78rem;
            text-decoration: none;
        }
    }

    & .app-header-actions {
        display: flex;
        align-items: center;
        gap: 13px;

        .theme-toggle-btn {
            block-size: var(--header-action-size);
            inline-size: var(--header-action-size);
            font-size: 1rem;
            color: var(--text-color);
            padding: 2px;

            &:active {
                padding: 2.5px 1.5px 1.5px 2.5px;
            }
        }

        .btn-logout {
            block-size: var(--header-action-size);
            font-size: 0.78rem;
            text-decoration: none;

            &>span {
                border-inline-end: 1px solid var(--border-color);
                padding-inline-end: 8px;
                margin-inline-end: 8px;
            }
        }
    }
}


.main-container {
    width: 100%;
    margin: 0 auto;
    padding: 0;
}

.right-column {
    min-width: var(--side-col-min-width);
    padding: 16px 16px 0 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
    justify-content: flex-start;
}

.btn-dev-raw {
    text-transform: lowercase;
    padding: 6px 14px;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border-radius: var(--radius-md);
}

/* Mobile / Narrow Responsive Layout (< 1100px) */
@media (max-width: 1100px) {
    .app-layout-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
        gap: 0;
    }

    .app-header-inner {
        margin-block-end: 24px;
    }

    .left-column {
        position: static;
        flex-direction: row;
        align-items: center;
        justify-content: flex-start;
        height: auto;
        min-height: 0;
        max-height: none;
        min-width: 0;
    }

    .center-column {
        padding-inline: 24px;
        padding-bottom: calc(32px + 42px + 42px + 32px);

        & .search-form {
            display: none;
        }
    }

    #queue-content {
        flex: 0 0 auto;
    }

    .app-brand {
        width: var(--logo-size-mobile);
        height: var(--logo-size-mobile);
    }

    .right-column {
        display: none;
    }
}