/**
 * RESL Interface System
 * Shared design tokens and accessible component contracts.
 * Page styles may arrange components but must not redefine their basic states.
 */

:root {
    --resl-surface-raised: #ffffff;
    --resl-danger: #b42318;
    --resl-success: #15803d;
    --resl-warning: #a16207;
    --resl-space-1: .25rem;
    --resl-space-2: .5rem;
    --resl-space-3: .75rem;
    --resl-space-4: 1rem;
    --resl-space-5: 1.5rem;
    --resl-radius-sm: .45rem;
    --resl-radius-md: .7rem;
    --resl-radius-lg: .9rem;
    --resl-control-height: 2.75rem;
    --resl-control-padding-x: .8rem;
    --resl-focus-color: color-mix(in srgb, var(--resl-primary) 30%, transparent);
    --resl-focus-ring: 0 0 0 .22rem var(--resl-focus-color);
    --resl-shadow-raised: 0 .65rem 1.6rem rgba(15, 23, 42, .1);
}

html[data-theme="dark"] {
    --resl-surface-raised: #232a4a;
    --resl-danger: #fda4af;
    --resl-success: #86efac;
    --resl-warning: #fcd34d;
    --resl-focus-color: rgba(147, 197, 253, .32);
    --resl-shadow-raised: 0 .75rem 1.8rem rgba(0, 0, 0, .28);
}

.resl-form-stack {
    display: grid;
    gap: var(--resl-space-4);
}

.resl-field {
    display: grid;
    gap: .35rem;
    margin: 0;
}

.resl-field__label {
    color: var(--resl-text);
    font-size: .78rem;
    font-weight: 800;
    line-height: 1.35;
}

.resl-field__hint,
.resl-field__error {
    font-size: .72rem;
    line-height: 1.45;
    margin: 0;
}

.resl-field__hint { color: var(--resl-text-muted); }
.resl-field__error { color: var(--resl-danger); }

.resl-control {
    background: var(--resl-surface);
    border: 1px solid var(--resl-border);
    border-radius: var(--resl-radius-sm);
    color: var(--resl-text);
    font: inherit;
    min-height: var(--resl-control-height);
    padding: .65rem var(--resl-control-padding-x);
    width: 100%;
}

.resl-control:hover:not(:disabled) {
    border-color: color-mix(in srgb, var(--resl-primary) 55%, var(--resl-border));
}

.resl-control:focus-visible {
    border-color: var(--resl-primary);
    box-shadow: var(--resl-focus-ring);
    outline: none;
}

.resl-control:disabled,
.resl-control[readonly] {
    background: var(--resl-track);
    color: var(--resl-text-muted);
    cursor: not-allowed;
    opacity: .82;
}

.resl-control[aria-invalid="true"] {
    border-color: var(--resl-danger);
}

.resl-choice-group {
    border: 1px solid var(--resl-border);
    border-radius: var(--resl-radius-md);
    display: grid;
    gap: var(--resl-space-3);
    margin: 0;
    padding: var(--resl-space-4);
}

.resl-choice-group > legend {
    color: var(--resl-text);
    float: none;
    font-size: .8rem;
    font-weight: 850;
    line-height: 1.35;
    margin: 0;
    padding: 0 .25rem;
    width: auto;
}

.resl-choice-group__help {
    color: var(--resl-text-muted);
    font-size: .72rem;
    line-height: 1.45;
    margin: -.2rem 0 0;
}

.resl-choice-grid {
    display: grid;
    gap: var(--resl-space-2);
    grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
}

.resl-choice {
    align-items: start;
    background: var(--resl-surface);
    border: 1px solid var(--resl-border);
    border-radius: var(--resl-radius-sm);
    color: var(--resl-text);
    cursor: pointer;
    display: grid;
    gap: var(--resl-space-3);
    grid-template-columns: 1.25rem minmax(0, 1fr);
    margin: 0;
    min-height: 3.2rem;
    padding: .75rem;
    transition: background-color .15s ease, border-color .15s ease, box-shadow .15s ease;
}

.resl-choice:hover {
    background: color-mix(in srgb, var(--resl-primary) 5%, var(--resl-surface));
    border-color: color-mix(in srgb, var(--resl-primary) 55%, var(--resl-border));
}

.resl-choice:focus-within {
    border-color: var(--resl-primary);
    box-shadow: var(--resl-focus-ring);
}

.resl-choice__input {
    appearance: none !important;
    background: var(--resl-surface) !important;
    border: 2px solid color-mix(in srgb, var(--resl-text-muted) 70%, var(--resl-border)) !important;
    border-radius: .3rem !important;
    box-shadow: none !important;
    cursor: pointer;
    flex: 0 0 1.25rem;
    height: 1.25rem !important;
    margin: .1rem 0 0 !important;
    min-height: 1.25rem !important;
    padding: 0 !important;
    width: 1.25rem !important;
}

.resl-choice__input[type="radio"] { border-radius: 50% !important; }

.resl-choice__input:checked {
    background-color: var(--resl-primary) !important;
    border-color: var(--resl-primary) !important;
}

.resl-choice__input[type="checkbox"]:checked {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' d='M3 8.5 6.5 12 13 4.5'/%3E%3C/svg%3E") !important;
    background-position: center !important;
    background-repeat: no-repeat !important;
    background-size: .9rem .9rem !important;
}

.resl-choice__input[type="radio"]:checked {
    box-shadow: inset 0 0 0 .24rem var(--resl-surface) !important;
}

.resl-choice__input:focus-visible {
    box-shadow: var(--resl-focus-ring) !important;
    outline: none;
}

.resl-choice__input:disabled,
.resl-choice:has(.resl-choice__input:disabled) {
    cursor: not-allowed;
    opacity: .62;
}

.resl-choice > .resl-choice__content {
    display: grid;
    gap: .18rem;
    margin: 0;
    min-width: 0;
}

.resl-choice__content strong {
    color: var(--resl-text);
    font-size: .75rem;
    line-height: 1.35;
}

.resl-choice__content small {
    color: var(--resl-text-muted);
    font-size: .68rem;
    line-height: 1.45;
}

.resl-choice--compact {
    min-height: 2.75rem;
    padding: .65rem .7rem;
}

.resl-form-actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: var(--resl-space-2);
    justify-content: flex-end;
}

.resl-disclosure {
    background: var(--resl-surface);
    border: 1px solid var(--resl-border);
    border-radius: var(--resl-radius-lg);
    overflow: hidden;
}

.resl-disclosure > summary {
    align-items: center;
    color: var(--resl-text);
    cursor: pointer;
    display: flex;
    gap: var(--resl-space-3);
    justify-content: space-between;
    list-style: none;
    min-height: 4rem;
    padding: var(--resl-space-4);
}

.resl-disclosure > summary::-webkit-details-marker { display: none; }

.resl-disclosure > summary::after {
    align-items: center;
    border: 1px solid var(--resl-border);
    border-radius: 50%;
    color: var(--resl-text-muted);
    content: "+";
    display: inline-flex;
    flex: 0 0 1.75rem;
    font-size: 1rem;
    font-weight: 800;
    height: 1.75rem;
    justify-content: center;
    line-height: 1;
}

.resl-disclosure[open] > summary {
    border-bottom: 1px solid var(--resl-border);
}

.resl-disclosure[open] > summary::after { content: "−"; }

.resl-disclosure > summary:hover {
    background: color-mix(in srgb, var(--resl-primary) 5%, var(--resl-surface));
}

.resl-disclosure > summary:focus-visible {
    box-shadow: inset var(--resl-focus-ring);
    outline: none;
}

.resl-disclosure__title {
    display: grid;
    gap: .15rem;
    min-width: 0;
}

.resl-disclosure__title small {
    color: var(--resl-text-muted);
    font-size: .68rem;
    font-weight: 700;
    line-height: 1.35;
}

.resl-disclosure__title strong {
    color: var(--resl-text);
    font-size: .92rem;
    line-height: 1.3;
}

.resl-disclosure__meta {
    background: var(--resl-track);
    border-radius: 999px;
    color: var(--resl-text-muted);
    font-size: .67rem;
    font-weight: 800;
    padding: .3rem .55rem;
    white-space: nowrap;
}

@media (max-width: 720px) {
    .resl-choice-grid { grid-template-columns: 1fr; }
    .resl-form-actions { align-items: stretch; flex-direction: column; }
    .resl-form-actions > * { justify-content: center; width: 100%; }
}

@media (forced-colors: active) {
    .resl-choice__input { appearance: auto !important; }
}