#scramble-bar,
#left-panel,
#right-panel,
#timer-info,
#mobile-panel-tabs,
#btn-settings {
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

body.solving #scramble-bar,
body.solving #left-panel,
body.solving #right-panel,
body.solving #timer-info,
body.solving #mobile-panel-tabs,
body.solving #btn-settings {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--right-panel-width);
    grid-template-rows: auto 1fr;
    grid-template-areas:
        "scramble scramble scramble"
        "left     center   right";
    min-height: 100dvh;
    height: 100dvh;
    gap: var(--space-sm);
    padding: var(--space-sm);
    padding-top: 0;
}

#scramble-bar {
    grid-area: scramble;
}

#left-panel {
    grid-area: left;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    overflow: hidden;
    min-height: 0;
    z-index: 1;
}

#left-panel.custom-select-open {
    overflow: visible;
    z-index: 40;
}

#center-panel {
    grid-area: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 0;
    padding-bottom: 12vh;
    z-index: 10;
}

#right-panel {
    grid-area: right;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding-bottom: calc(var(--space-xl) * 2.5);
    overflow: hidden;
    min-height: 0;
    z-index: 1;
}

#cube-panel,
#graph-panel {
    box-shadow: none;
}

#mobile-panel-tabs {
    display: none;
}

@media (min-width: 1101px) and (pointer: fine) {
    #app-layout {
        grid-template-rows: var(--scramble-bar-height) minmax(0, 1fr);
    }

    #left-panel,
    #right-panel {
        height: calc(100% / var(--desktop-panel-scale, 1));
        transform: scale(var(--desktop-panel-scale, 1));
        will-change: transform;
    }

    #left-panel {
        transform-origin: top left;
        justify-self: start;
    }

    #right-panel {
        transform-origin: top right;
        justify-self: end;
    }
}

@media (max-width: 1100px), (pointer: coarse) {
    #app-layout {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        grid-template-rows: auto 1fr auto;
        grid-template-areas:
            "scramble scramble"
            "center   center"
            "left     right";
    }

    #left-panel,
    #right-panel {
        max-height: 40vh;
    }
}

@media (max-width: 1100px), (pointer: coarse) {

    html,
    body {
        min-height: 100%;
        overflow: hidden;
    }

    #app-layout {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: auto auto minmax(0, 1fr);
        grid-template-areas:
            "scramble"
            "center"
            "stack";
        min-height: 100dvh;
        height: 100dvh;
        gap: var(--space-md);
        padding:
            calc(var(--safe-area-top) + var(--space-sm)) var(--space-sm) calc(var(--mobile-tab-height) + var(--safe-area-bottom) + var(--space-2xl));
        overflow: hidden;
    }

    #center-panel {
        padding: var(--space-sm) var(--space-xs) 0;
        min-height: min(58vh, 520px);
        justify-content: center;
    }

    #left-panel,
    #right-panel {
        grid-area: stack;
        max-height: none;
        overflow: visible;
    }

    body[data-mobile-panel="stats"] #scramble-bar,
    body[data-mobile-panel="stats"] #center-panel,
    body[data-mobile-panel="trend"] #scramble-bar,
    body[data-mobile-panel="trend"] #center-panel {
        display: none;
    }

    body[data-mobile-panel="stats"] #app-layout,
    body[data-mobile-panel="trend"] #app-layout {
        grid-template-rows: minmax(0, 1fr);
        grid-template-areas: "stack";
        gap: 0;
        min-height: 100dvh;
        height: 100dvh;
        padding:
            calc(var(--safe-area-top) + var(--space-xs)) var(--space-sm) calc(var(--mobile-tab-height) + var(--safe-area-bottom) + var(--space-xl));
    }

    body[data-mobile-panel="trend"] #app-layout {
        padding-top: calc(var(--safe-area-top) + 12px);
    }

    body[data-mobile-panel="timer"] #app-layout {
        grid-template-rows: auto minmax(0, 1fr);
        grid-template-areas:
            "scramble"
            "center";
        gap: var(--space-sm);
    }

    body[data-mobile-panel="timer"] #left-panel,
    body[data-mobile-panel="stats"] #right-panel,
    body[data-mobile-panel="trend"] #left-panel {
        display: none;
    }

    body[data-mobile-panel="trend"] #right-panel {
        height: 100%;
        justify-content: center;
        padding-bottom: 0;
    }

    body[data-mobile-panel="timer"] #right-panel {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--space-sm);
        align-items: stretch;
        position: fixed;
        left: 10px;
        right: 10px;
        bottom: calc(var(--mobile-tab-height) + var(--safe-area-bottom) + 30px);
        padding-bottom: 0;
        z-index: 20;
    }

    body[data-mobile-panel="timer"] #center-panel {
        height: 100%;
        min-height: 0;
        padding-bottom: calc(var(--mobile-tab-height) + var(--safe-area-bottom) + clamp(150px, 27vh, 198px));
        overflow: visible;
        touch-action: none;
    }

    body[data-mobile-panel="timer"] #scramble-bar,
    body[data-mobile-panel="timer"] #scramble-top-row,
    body[data-mobile-panel="timer"] #scramble-container {
        touch-action: none;
    }

    body[data-mobile-panel="timer"] #graph-panel,
    body[data-mobile-panel="trend"] #cube-panel,
    body[data-mobile-panel="trend"] #mobile-summary-card {
        display: none;
    }

    body[data-mobile-panel="timer"] #cube-panel,
    body[data-mobile-panel="timer"] #mobile-summary-card,
    body[data-mobile-panel="trend"] #graph-panel {
        display: block;
    }

    body[data-mobile-panel="timer"] #cube-panel .panel-header {
        display: none;
    }

    body[data-mobile-panel="timer"] #cube-panel .collapsible-body,
    body[data-mobile-panel="timer"] #cube-panel.collapsed .collapsible-body {
        max-height: none !important;
        opacity: 1;
    }

    #mobile-panel-tabs {
        display: flex;
        position: fixed;
        left: 12px;
        right: calc(12px + var(--mobile-tab-height) + 12px);
        bottom: calc(var(--safe-area-bottom) + 12px);
        min-height: var(--mobile-tab-height);
        align-items: center;
        gap: 6px;
        padding: 6px;
        border-radius: 999px;
        background: var(--mobile-tabs-surface);
        border: 1px solid var(--floating-surface-border);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
        backdrop-filter: blur(18px);
        z-index: 9;
    }

    .mobile-panel-tab {
        min-width: 0;
        min-height: calc(var(--mobile-tab-height) - 12px);
        flex: 1;
        padding: 0 14px;
        border: 1px solid transparent;
        box-sizing: border-box;
        border-radius: 999px;
        background: transparent;
        font-size: var(--text-sm);
        font-weight: 700;
        letter-spacing: 0.02em;
        color: var(--text-secondary);
        transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    }

    .mobile-panel-tab.active {
        background: var(--floating-surface);
        border-color: var(--floating-surface-border);
        color: var(--text-primary);
        box-shadow: none;
    }

    .mobile-panel-tab:active {
        transform: scale(0.97);
    }

    body.zen #mobile-panel-tabs {
        opacity: 0;
        pointer-events: none;
    }

    #btn-settings {
        position: fixed;
        right: 12px;
        bottom: calc(var(--safe-area-bottom) + 12px);
        z-index: 42;
        width: var(--mobile-tab-height);
        height: var(--mobile-tab-height);
        font-size: 22px;
        opacity: 0.95;
    }
}

@media (max-width: 1100px) {
    body[data-mobile-panel="timer"] #right-panel {
        bottom: calc(var(--mobile-tab-height) + var(--safe-area-bottom) + 28px);
    }

    body[data-mobile-panel="timer"] #center-panel {
        min-height: 0;
        padding-bottom: calc(var(--mobile-tab-height) + var(--safe-area-bottom) + clamp(144px, 26vh, 188px));
    }
}

@media (max-width: 1100px) and (orientation: landscape) and (max-height: 650px),
(pointer: coarse) and (orientation: landscape) and (max-height: 650px) {
    #mobile-panel-tabs {
        left: 7vw;
        right: calc(7vw + var(--mobile-tab-height) + 12px);
    }

    #btn-settings {
        right: 7vw;
    }

    body[data-mobile-panel="timer"] #right-panel {
        left: 7vw;
        right: 7vw;
    }

    body[data-mobile-panel="stats"] #app-layout,
    body[data-mobile-panel="trend"] #app-layout {
        padding-left: 7vw;
        padding-right: 7vw;
    }

    body[data-mobile-panel="timer"] #cube-panel,
    body[data-mobile-panel="timer"] #mobile-summary-card {
        display: none;
    }

    body[data-mobile-panel="timer"] #center-panel {
        padding-bottom: calc(var(--mobile-tab-height) + var(--safe-area-bottom) + var(--space-sm));
    }
}