/* =========================================================================
   Navier-Stokes Simulation — launcher
   Mesmos tokens do HUD (styles.css), em escala de dialogo: isto e a primeira
   coisa que o usuario ve, entao le como tela de titulo e nao como formulario.
   Tudo local e offline: nenhuma fonte, folha ou script externo.
   ========================================================================= */

:root {
    --lx-z: 30;
    --lx-tap: 44px;                 /* alvo minimo em qualquer tela */
    --lx-warn: #ff9a8a;
    --lx-warn-soft: rgba(255, 154, 138, 0.12);
    --lx-warn-line: rgba(255, 154, 138, 0.38);
}

/* `hidden` tem que vencer o display do componente (o botao "Voltar", o banner
   de erro): sem isto um display:inline-flex de classe derrubaria o atributo. */
.lx [hidden] { display: none !important; }

/* ------------------------------- overlay --------------------------------- */

.lx {
    position: fixed;
    inset: 0;
    z-index: var(--lx-z);
    display: none;                  /* exibido so pela classe .lx--on */
    align-items: center;
    justify-content: center;
    padding: 24px;
    padding-top: max(24px, var(--sat, 0px));
    padding-bottom: max(24px, var(--sab, 0px));
    color: var(--text, #e9edf6);
    font-family: var(--font, system-ui, sans-serif);
    font-size: 13px;
    line-height: 1.45;
    /* o canvas continua vivo atras: so um veu escuro com desfoque */
    background:
        radial-gradient(1100px 640px at 50% -12%, rgba(34, 211, 238, 0.16), transparent 70%),
        rgba(3, 5, 10, 0.84);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

.lx--on { display: flex; }

.lx-dialog {
    display: flex;
    flex-direction: column;
    width: min(1040px, 100%);
    max-height: 100%;
    min-height: 0;
    overflow: hidden;
    background: var(--surface-strong, rgba(13, 16, 24, 0.92));
    border: 1px solid var(--border-hi, rgba(255, 255, 255, 0.20));
    border-radius: var(--radius, 14px);
    box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7);
}

/* -------------------------------- header --------------------------------- */

.lx-header {
    flex: none;
    padding: 16px 20px 12px;
    border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    background: linear-gradient(180deg, rgba(34, 211, 238, 0.10), rgba(34, 211, 238, 0));
}

.lx-title {
    margin: 0;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.20em;
    text-transform: uppercase;
    color: var(--accent, #22d3ee);
}

.lx-subtitle {
    margin: 4px 0 0;
    font-size: 12px;
    color: var(--text-dim, #99a3ba);
}

/* -------------------- seletores segmentados (topo) ----------------------- */

.lx-modes {
    flex: none;
    display: grid;
    grid-template-columns: minmax(0, auto) minmax(0, 1fr);
    gap: 12px 22px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.10));
}

.lx-seg { min-width: 0; }

.lx-seg__label {
    margin: 0 0 6px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-faint, #8b95ad);
}

.lx-seg__group {
    display: inline-flex;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: var(--radius-sm, 10px);
    background: rgba(255, 255, 255, 0.035);
}

.lx-seg__note {
    margin: 6px 0 0;
    font-size: 11px;
    color: var(--text-faint, #8b95ad);
}

.lx-opt {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--lx-tap);
    min-width: 76px;
    padding: 0 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: transparent;
    color: var(--text-dim, #99a3ba);
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.lx-opt:hover:not(:disabled) { background: var(--surface-raise, rgba(255, 255, 255, 0.06)); }

.lx-opt.is-active {
    background: var(--accent-soft, rgba(34, 211, 238, 0.16));
    border-color: rgba(34, 211, 238, 0.45);
    color: var(--accent, #22d3ee);
}

.lx-opt:disabled {
    color: #808b9e;
    cursor: not-allowed;
    text-decoration: line-through;
    text-decoration-thickness: 1px;
}

/* ------------------------------ corpo ------------------------------------ */

.lx-body {
    flex: 1 1 auto;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.lx-left,
.lx-right {
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding: 14px 16px 16px;
}

.lx-left {
    gap: 9px;
    border-right: 1px solid var(--border, rgba(255, 255, 255, 0.10));
}

.lx-right {
    gap: 8px;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.lx-filters {
    flex: none;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.lx-chip {
    min-height: var(--lx-tap);
    padding: 0 14px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: var(--radius-pill, 999px);
    background: rgba(255, 255, 255, 0.035);
    color: var(--text-dim, #99a3ba);
    font: inherit;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.lx-chip:hover { background: var(--surface-raise, rgba(255, 255, 255, 0.06)); }

.lx-chip.is-active {
    background: var(--accent-soft, rgba(34, 211, 238, 0.16));
    border-color: rgba(34, 211, 238, 0.45);
    color: var(--accent, #22d3ee);
}

.lx-cards,
.lx-right,
.lx-body {
    scrollbar-width: thin;
    scrollbar-color: var(--surface-raise-hi, rgba(255, 255, 255, 0.12)) transparent;
}

.lx-cards::-webkit-scrollbar,
.lx-right::-webkit-scrollbar,
.lx-body::-webkit-scrollbar { width: 8px; }

.lx-cards::-webkit-scrollbar-thumb,
.lx-right::-webkit-scrollbar-thumb,
.lx-body::-webkit-scrollbar-thumb {
    border-radius: var(--radius-pill, 999px);
    background: var(--surface-raise-hi, rgba(255, 255, 255, 0.12));
}

/* ---------------------------- um card por cenario ------------------------ */

.lx-cards {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin: 0 -4px;
    padding: 2px 4px;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.lx-card {
    display: flex;
    flex-direction: column;
    flex: none;                     /* numa lista cheia o card nao pode encolher
                                       e vazar o proprio texto para fora da borda */
    gap: 3px;
    width: 100%;
    min-height: var(--lx-tap);
    padding: 10px 12px;
    text-align: left;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: var(--radius-sm, 10px);
    background: rgba(255, 255, 255, 0.035);
    color: var(--text, #e9edf6);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.lx-card:hover { background: var(--surface-raise, rgba(255, 255, 255, 0.06)); }

.lx-card.is-active {
    background: var(--accent-soft, rgba(34, 211, 238, 0.16));
    border-color: rgba(34, 211, 238, 0.55);
}

.lx-card__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.lx-card__name { font-weight: 700; letter-spacing: 0.01em; }

.lx-card__description {
    color: var(--text-dim, #99a3ba);
    font-size: 11.5px;
    font-weight: 400;
}

.lx-badge {
    flex: 0 0 auto;
    padding: 2px 8px;
    border: 1px solid rgba(167, 139, 250, 0.34);
    border-radius: var(--radius-pill, 999px);
    background: rgba(167, 139, 250, 0.14);
    color: var(--violet, #a78bfa);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    white-space: nowrap;
}

/* cores por categoria: puramente decorativas, nunca a unica informacao */
.lx-badge[data-category="ionica"] {
    color: var(--accent, #22d3ee);
    background: rgba(34, 211, 238, 0.14);
    border-color: rgba(34, 211, 238, 0.34);
}

.lx-badge[data-category="covalente"] {
    color: #86efac;
    background: rgba(134, 239, 172, 0.13);
    border-color: rgba(134, 239, 172, 0.32);
}

.lx-badge[data-category="metalica"] {
    color: #fcd34d;
    background: rgba(252, 211, 77, 0.13);
    border-color: rgba(252, 211, 77, 0.32);
}

/* ------------------------- coluna de parametros -------------------------- */

.lx-detailhead {
    flex: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.lx-name { margin: 0; font-size: 15px; font-weight: 700; }

.lx-description {
    flex: none;
    margin: 0;
    color: var(--text-dim, #99a3ba);
    font-size: 12px;
}

.lx-kept {
    flex: none;
    margin: 0;
    padding: 7px 10px;
    border: 1px solid rgba(252, 211, 77, 0.30);
    border-radius: 8px;
    background: rgba(252, 211, 77, 0.09);
    color: #fcd34d;
    font-size: 11px;
}

.lx-params {
    display: flex;
    flex-direction: column;
    flex: none;
    gap: 10px;
    padding-top: 2px;
}

.lx-empty {
    margin: 0;
    padding: 8px 2px;
    color: var(--text-faint, #8b95ad);
    font-size: 12px;
}

.lx-param {
    display: flex;
    flex-direction: column;
    flex: none;
    gap: 5px;
    padding: 9px 11px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: var(--radius-sm, 10px);
    background: rgba(255, 255, 255, 0.03);
}

.lx-param__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
}

.lx-param__label { font-size: 12px; color: var(--text, #e9edf6); }

.lx-param__value {
    color: var(--accent, #22d3ee);
    font-size: 12px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.lx-param__inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lx-param__range {
    flex: 1 1 auto;
    min-width: 0;
    height: var(--lx-tap);
    margin: 0;
    accent-color: var(--accent, #22d3ee);
    background: transparent;
    cursor: pointer;
}

.lx-param__number {
    flex: 0 0 auto;
    width: 92px;
    min-height: var(--lx-tap);
    padding: 0 8px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text, #e9edf6);
    font: inherit;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.lx-param__select {
    flex: 1 1 auto;
    min-width: 0;
    min-height: var(--lx-tap);
    padding: 0 8px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text, #e9edf6);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
}

.lx-param__select option { background: #0b111c; color: var(--text, #e9edf6); }

.lx-param__unit {
    flex: 0 0 auto;
    color: var(--text-faint, #8b95ad);
    font-size: 12px;
}

.lx-param__help {
    margin: 0;
    color: var(--text-faint, #8b95ad);
    font-size: 11px;
}

/* interruptor dos parametros booleanos (mesmo desenho do switch do HUD) */
.lx-switch {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    min-height: var(--lx-tap);
    padding: 0 12px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: var(--radius-sm, 10px);
    background: transparent;
    color: var(--text-dim, #99a3ba);
    font: inherit;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.lx-switch__track {
    position: relative;
    flex: none;
    width: 28px;
    height: 16px;
    border-radius: var(--radius-pill, 999px);
    background: var(--surface-raise-hi, rgba(255, 255, 255, 0.12));
    transition: background 0.15s ease;
}

.lx-switch__thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-faint, #8b95ad);
    transition: transform 0.15s ease, background 0.15s ease;
}

.lx-switch[aria-pressed="true"] { color: var(--text, #e9edf6); border-color: rgba(34, 211, 238, 0.34); }
.lx-switch[aria-pressed="true"] .lx-switch__track { background: var(--accent-soft, rgba(34, 211, 238, 0.16)); }
.lx-switch[aria-pressed="true"] .lx-switch__thumb {
    transform: translateX(12px);
    background: var(--accent, #22d3ee);
}

/* --------------------------- erro e rodape ------------------------------- */

.lx-error {
    flex: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0 16px;
    padding: 9px 12px;
    border: 1px solid var(--lx-warn-line);
    border-radius: 8px;
    background: var(--lx-warn-soft);
    color: var(--lx-warn);
}

.lx-error__text { margin: 0; min-width: 0; font-size: 12px; }

.lx-footer {
    flex: none;
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 12px 16px;
    border-top: 1px solid var(--border, rgba(255, 255, 255, 0.10));
}

.lx-spacer { flex: 1 1 auto; }

.lx-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--lx-tap);
    padding: 0 16px;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.10));
    border-radius: var(--radius-sm, 10px);
    background: var(--surface-raise, rgba(255, 255, 255, 0.06));
    color: var(--text, #e9edf6);
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.lx-btn:hover { background: var(--surface-raise-hi, rgba(255, 255, 255, 0.12)); }

.lx-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.lx-btn--primary {
    background: var(--accent, #22d3ee);
    border-color: transparent;
    color: var(--accent-ink, #04222a);
}

.lx-btn--primary:hover { background: #4fe0f4; }

.lx-btn--warn {
    flex: 0 0 auto;
    border-color: var(--lx-warn-line);
    background: rgba(255, 154, 138, 0.14);
    color: var(--lx-warn);
}

.lx-btn--warn:hover { background: rgba(255, 154, 138, 0.24); }

.lx-start { min-width: 168px; }

/* foco sempre visivel: o dialogo tem que ser usavel so no teclado */
.lx :where(button, select, input):focus-visible {
    outline: 2px solid var(--accent, #22d3ee);
    outline-offset: 2px;
}

/* ================================= MOBILE ================================= */

/* Uma coluna: cards e depois o formulario, num unico scroll interno. O rodape
   continua fixo no dialogo, entao nunca sai da tela. */
@media (max-width: 860px) {
    .lx {
        padding: 8px;
        padding-top: max(8px, var(--sat, 0px));
        padding-bottom: max(8px, var(--sab, 0px));
    }

    .lx-header { padding: 12px 14px 10px; }
    .lx-subtitle { font-size: 11.5px; }

    .lx-modes {
        grid-template-columns: minmax(0, 1fr);
        gap: 10px;
        padding: 10px 14px;
    }

    .lx-seg__group {
        display: grid;
        grid-auto-flow: column;
        grid-auto-columns: minmax(0, 1fr);
        width: 100%;
    }

    .lx-opt { min-width: 0; padding: 0 8px; }

    /* numa tela estreita a dica do 2D/3D e a primeira coisa dispensavel: o que
       precisa mesmo de explicacao e a ligacao bloqueada. */
    #lx-dimension-note { display: none; }

    /* o scroll passa a ser do corpo inteiro; as colunas nao rolam sozinhas */
    .lx-body {
        display: flex;
        flex-direction: column;
        overflow-y: auto;
        overscroll-behavior: contain;
    }

    .lx-left,
    .lx-right {
        flex: 0 0 auto;
        min-height: auto;
        overflow: visible;
    }

    .lx-left {
        border-right: none;
        border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.10));
        padding: 12px 14px 14px;
    }

    .lx-right { padding: 12px 14px 16px; }

    .lx-cards {
        flex: 0 0 auto;
        min-height: auto;
        max-height: none;
        overflow: visible;
    }

    .lx-error { margin: 0 14px; flex-wrap: wrap; }
    .lx-footer { flex-wrap: wrap; padding: 10px 14px; }
    .lx-btn { flex: 1 1 auto; padding: 0 12px; }
    .lx-spacer { display: none; }
    .lx-start { flex: 1 1 100%; min-width: 0; order: 3; }
}

/* Paisagem curta (844x390): duas colunas de novo, tudo mais raso. Vem depois do
   bloco acima de proposito: em 844x390 os dois casam e este tem que vencer. */
@media (min-width: 600px) and (max-height: 520px) {
    .lx { padding: 6px; }

    .lx-header { padding: 8px 14px 6px; }
    .lx-subtitle { display: none; }

    .lx-modes {
        grid-template-columns: minmax(0, auto) minmax(0, 1fr);
        gap: 8px 18px;
        padding: 8px 14px;
    }

    .lx-seg__group { display: inline-flex; width: auto; }
    .lx-seg__note { margin-top: 4px; }
    .lx-opt { min-width: 64px; padding: 0 12px; }

    .lx-body {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        overflow: hidden;
    }

    .lx-left,
    .lx-right { min-height: 0; padding: 10px 12px; }

    .lx-left {
        border-right: 1px solid var(--border, rgba(255, 255, 255, 0.10));
        border-bottom: none;
    }

    .lx-right { overflow-y: auto; }

    .lx-cards {
        flex: 1 1 auto;
        min-height: 0;
        overflow-y: auto;
    }

    .lx-error { margin: 0 12px; flex-wrap: nowrap; }
    .lx-footer { flex-wrap: nowrap; padding: 8px 12px; }
    .lx-btn { flex: 0 0 auto; }
    .lx-spacer { display: block; }
    .lx-start { flex: 0 0 auto; min-width: 132px; order: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .lx *, .lx *::before, .lx *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}