/* Seleção compacta do simulado: botões no painel e janelas minimalistas. */
.discipline-filter,
.chapter-filter,
.limit-filter {
    display: grid;
    align-content: start;
    gap: 7px;
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
    color: var(--text-muted);
    font: 600 11.5px var(--type-ui);
    letter-spacing: .03em;
    text-transform: uppercase;
}

.limit-filter { gap: 0; }
.limit-filter legend { margin: 0 0 7px; padding: 0; }

.study-filter-trigger {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr) 16px;
    align-items: center;
    gap: 9px;
    width: 100%;
    min-height: 45px;
    padding: 6px 10px;
    color: var(--text-main);
    background: var(--canvas);
    border: 1px solid var(--line);
    border-radius: 7px;
    cursor: pointer;
    text-align: left;
    transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
}

.study-filter-trigger:hover {
    background: var(--canvas-soft);
    border-color: color-mix(in srgb, var(--navy-mid) 36%, var(--line));
}

.study-filter-trigger:focus-visible {
    outline: 2px solid var(--signal);
    outline-offset: 2px;
}

.study-filter-trigger.has-empty-selection {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--line));
}

.study-filter-icon,
.study-modal-heading-icon,
.discipline-line-icon {
    display: grid;
    place-items: center;
    color: var(--text-accent);
}

.study-filter-icon {
    width: 30px;
    height: 30px;
    color: var(--navy-mid);
    background: color-mix(in srgb, var(--navy-mid) 8%, var(--canvas));
    border: 1px solid color-mix(in srgb, var(--navy-mid) 20%, var(--line));
    border-radius: 7px;
}

.study-filter-icon svg,
.study-modal-heading-icon svg,
.discipline-line-icon svg,
.study-filter-search svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.65;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.study-filter-copy { display: grid; min-width: 0; }
.study-filter-copy strong {
    overflow: hidden;
    color: var(--text-main);
    font: 700 12.5px/1.25 var(--type-ui);
    text-overflow: ellipsis;
    text-transform: none;
    white-space: nowrap;
}
.study-filter-copy small {
    overflow: hidden;
    margin-top: 2px;
    color: var(--text-muted);
    font: 500 9px/1.2 var(--type-ui);
    text-overflow: ellipsis;
    text-transform: none;
    white-space: nowrap;
}
.study-filter-arrow {
    color: var(--text-muted);
    font: 400 24px/1 var(--type-ui);
    text-align: center;
}

.study-filter-overlay { z-index: 140; }
.study-filter-modal {
    display: flex;
    flex-direction: column;
    width: min(470px, 100%);
    max-height: min(76vh, 650px);
    overflow: hidden;
    border-radius: 12px;
}

.study-filter-modal-header {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr) 34px;
    align-items: center;
    gap: 11px;
    padding: 14px 15px;
    color: var(--text-main);
    background: var(--panel-surface);
    border-bottom: 1px solid var(--line);
}
.study-modal-heading-icon {
    width: 38px;
    height: 38px;
    color: var(--navy-mid);
    background: color-mix(in srgb, var(--navy-mid) 8%, var(--canvas));
    border: 1px solid color-mix(in srgb, var(--navy-mid) 20%, var(--line));
    border-radius: 9px;
}
.study-modal-heading-icon svg { width: 21px; height: 21px; }
.study-filter-modal-header small {
    display: block;
    margin-bottom: 2px;
    color: var(--text-muted);
    font: 700 8.5px/1 var(--type-ui);
    letter-spacing: .12em;
    text-transform: uppercase;
}
.study-filter-modal-header h2 {
    margin: 0;
    color: var(--text-main);
    font: 750 18px/1.2 var(--type-heading);
}
.study-modal-close {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    color: var(--text-muted);
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 8px;
    cursor: pointer;
    font: 400 22px/1 var(--type-ui);
}
.study-modal-close:hover { color: var(--text-main); background: var(--canvas-soft); }

.study-filter-search {
    position: relative;
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background: var(--canvas-soft);
    border-bottom: 1px solid var(--line);
}
.study-filter-search svg {
    position: absolute;
    left: 23px;
    width: 17px;
    height: 17px;
    color: var(--text-muted);
    pointer-events: none;
}
.study-filter-search input {
    width: 100%;
    min-height: 39px;
    padding: 8px 10px 8px 35px;
    color: var(--text-main);
    background: var(--panel-surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    font: 500 12px var(--type-ui);
}

.study-filter-modal .discipline-option-list {
    max-height: none;
    padding: 7px;
    overflow-y: auto;
    overscroll-behavior: contain;
}
.study-filter-modal .discipline-option-list button {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr) 20px;
    align-items: center;
    gap: 9px;
    width: 100%;
    min-height: 48px;
    padding: 6px 9px;
    color: var(--text-main);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
}
.study-filter-modal .discipline-option-list button:hover,
.study-filter-modal .discipline-option-list button.is-selected {
    background: color-mix(in srgb, var(--navy-mid) 7%, var(--canvas));
    border-color: color-mix(in srgb, var(--navy-mid) 22%, var(--line));
}
.discipline-line-icon {
    width: 32px;
    height: 32px;
    color: var(--navy-mid);
    background: var(--canvas-soft);
    border: 1px solid var(--line);
    border-radius: 7px;
}
.discipline-line-icon svg { width: 18px; height: 18px; }
.study-filter-modal .discipline-option-list span:not(.discipline-line-icon) { display: grid; min-width: 0; }
.study-filter-modal .discipline-option-list strong {
    overflow: hidden;
    font: 700 12px/1.3 var(--type-ui);
    text-overflow: ellipsis;
    white-space: nowrap;
}
.study-filter-modal .discipline-option-list small { color: var(--text-muted); font: 500 9px var(--type-ui); }
.study-filter-modal .discipline-option-list i { color: var(--success); font-style: normal; opacity: 0; }
.study-filter-modal .discipline-option-list button.is-selected i { opacity: 1; }
.discipline-empty { margin: 24px 8px; color: var(--text-muted); font: 500 11px var(--type-ui); text-align: center; }

.chapter-selector-body { min-height: 0; overflow: hidden; }
.study-filter-modal .chapter-toolbar {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    padding: 9px 12px;
    background: var(--canvas-soft);
    border-bottom: 1px solid var(--line);
}
.study-filter-modal .chapter-toolbar button {
    padding: 6px 9px;
    color: var(--text-accent);
    background: var(--panel-surface);
    border: 1px solid var(--line);
    border-radius: 7px;
    cursor: pointer;
    font: 700 9px var(--type-ui);
}
.study-filter-modal .chapter-option-list {
    max-height: min(47vh, 390px);
    padding: 7px;
    overflow-y: auto;
    overscroll-behavior: contain;
}
.study-filter-modal .chapter-option-list label {
    display: flex;
    align-items: center;
    gap: 9px;
    min-height: 45px;
    margin: 0;
    padding: 7px 9px;
    color: var(--text-main);
    border: 1px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    font: 500 12.5px var(--type-ui);
    text-transform: none;
}
.study-filter-modal .chapter-option-list label:hover { background: var(--canvas-soft); border-color: var(--line); }
.study-filter-modal .chapter-option-list input[type="checkbox"] {
    appearance: none;
    flex: 0 0 18px;
    width: 18px;
    height: 18px;
    margin: 0;
    padding: 0;
    background: var(--canvas);
    border: 1px solid var(--text-muted);
    border-radius: 50%;
}
.study-filter-modal .chapter-option-list input:checked {
    background: radial-gradient(circle, var(--navy-mid) 0 4px, var(--canvas) 5px);
    border-color: var(--navy-mid);
}
.study-filter-modal .chapter-number {
    display: grid;
    place-items: center;
    width: 26px;
    height: 24px;
    flex: 0 0 26px;
    color: var(--text-accent);
    background: var(--canvas-soft);
    border: 1px solid var(--line);
    border-radius: 6px;
    font: 700 9px var(--type-ui);
}
.study-filter-modal .chapter-all-row { font-weight: 700; }

.study-filter-modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    background: var(--panel-surface);
    border-top: 1px solid var(--line);
}
.study-filter-modal-footer span { color: var(--text-muted); font: 600 10px var(--type-ui); }
.study-filter-modal-footer .ui-button { min-height: 36px; padding: 7px 15px; font-size: 10px; }

@media (max-width: 520px) {
    .study-filter-overlay { align-items: center; padding: 16px; }
    .study-filter-modal { width: min(91vw, 410px); max-height: 82svh; border-radius: 14px; }
    .study-filter-modal-header { padding: 13px 14px; }
    .study-filter-modal-header h2 { font-size: 17px; }
    .study-filter-modal .chapter-option-list { max-height: 48svh; }
}