/* App layout only. Colour, type and component styles live in design-system/. */

[hidden]{
    display: none !important;
}

.app-header{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-lg) 0;
    box-sizing: border-box;
}
.app-title{
    margin: 0;
}

.app{
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    gap: var(--space-lg);
    padding: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
    align-items: start;
}

.app-footer{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-xs) var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-lg);
    box-sizing: border-box;
    color: var(--ink-muted);
}
.app-footer p{
    margin: 0;
}
.footer-links{
    white-space: nowrap;
}
.app-footer a{
    color: var(--ink);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    border-radius: var(--radius-sm);
}
.app-footer a:hover{
    text-decoration-color: var(--border-strong);
}
.app-footer a:focus-visible{
    outline: 2px solid var(--focus-ring);
    outline-offset: 3px;
}

/* The array field wraps and grows instead of scrolling sideways */
.av-input--grow{
    display: block;
    resize: none;
    overflow: hidden;
}

/* Brackets drawn around the array field's contents, however many lines it wraps to */
.array-field{
    position: relative;
    display: block;
}
.array-field::before,
.array-field::after{
    content: "";
    position: absolute;
    top: 12px;
    bottom: 12px;
    width: 7px;
    border: 2.5px solid var(--ink-muted);
    pointer-events: none;
    transition: border-color .15s ease;
}
.array-field::before{
    left: 12px;
    border-right: 0;
    border-radius: 3px 0 0 3px;
}
.array-field::after{
    right: 12px;
    border-left: 0;
    border-radius: 0 3px 3px 0;
}
.array-field .av-input{
    padding-left: 28px;
    padding-right: 28px;
}
/* No border: the brackets carry the hover, focus and error states instead */
.array-field .av-input,
.array-field .av-input:hover,
.array-field .av-input:focus,
.array-field .av-input[aria-invalid="true"]{
    border-color: transparent;
}
.array-field:hover::before,
.array-field:hover::after{
    border-color: var(--ink);
}
.array-field:focus-within::before,
.array-field:focus-within::after{
    border-color: var(--focus-ring);
}
.array-field:has([aria-invalid="true"])::before,
.array-field:has([aria-invalid="true"])::after{
    border-color: var(--signal-miss);
}

/* Nudge when Run is pressed with no algorithm chosen */
.av-select[aria-invalid="true"]{
    border-color: var(--signal-miss);
}
.av-select-wrap{
    display: block; /* inline spans can't be transformed */
}
.av-select-wrap.is-nudged{
    animation: nudge .4s ease-in-out;
}
@keyframes nudge{
    20%{ transform: translateX(-6px); }
    40%{ transform: translateX(6px); }
    60%{ transform: translateX(-4px); }
    80%{ transform: translateX(4px); }
}
@media (prefers-reduced-motion: reduce){
    .av-select-wrap.is-nudged{
        animation: none;
    }
}

.panel-secondary-action{
    align-self: flex-start;
}

/* Room for the tallest tile plus its arrow, pointer and lift */
.av-stage__floor{
    min-height: 248px;
}
/* Tiles share the floor so up to 10 fit without horizontal scroll */
.av-stage__floor .av-slot{
    flex: 0 1 48px;
    min-width: 0;
}
.av-stage__floor .av-tile{
    width: 100%;
}
.av-stage__floor .av-pointer{
    width: min(40px, 100%);
}
/* Keep the arrow clear of a tile that lifts before a swap */
.av-slot:has(.av-tile[data-state="active"]) .av-arrow{
    translate: 0 -8px;
}

/* Legend marks for states the design system has no legend mark for */
.legend-mark-arrow{
    margin: 0;
}
.legend-mark-lift{
    width: 9px;
    height: 9px;
    margin: 4px 4px 0;
    border: solid var(--ink);
    border-width: 2.5px 0 0 2.5px;
    border-radius: 1px;
    transform: rotate(45deg);
}
.legend-mark-check{
    width: 6px;
    height: 11px;
    margin: 0 6px 3px;
    border: solid var(--ink);
    border-width: 0 2.5px 2.5px 0;
    transform: rotate(45deg);
}

/* Two columns stop fitting 10 tiles below this width */
@media (max-width: 1023px){
    .app{
        grid-template-columns: minmax(0, 1fr);
    }
}
@media (max-width: 759px){
    .app-header{
        padding: var(--space-md) var(--space-md) 0;
    }
    .app-footer{
        padding: 0 var(--space-md) var(--space-md);
    }
    .app{
        padding: var(--space-md);
        gap: var(--space-md);
    }
    .av-panel,
    .av-stage{
        padding: var(--space-md);
    }
}
@media (max-width: 479px){
    .av-stage__floor{
        gap: var(--space-xs);
        padding-left: var(--space-sm);
        padding-right: var(--space-sm);
    }
    .av-stage__floor .av-tile{
        font-size: 0.75rem;
    }
}