/* ========================================
   QUANTUM CHEMISTRY SIMULATOR - PANELS
   ======================================== */

/* Main UI Panel (Top Left) */
#ui {
    position: fixed;
    top: 15px;
    left: 15px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(15px);
    padding: 18px 20px;
    border-radius: 16px;
    border: 1px solid rgba(100, 200, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
    font-size: 13px;
    max-width: 320px;
    transition: all 0.3s ease;
    z-index: 100;
}

#ui.hidden {
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
}

#ui h3 {
    margin: 0 0 15px 0;
    font-size: 16px;
    color: #ffffff;
    text-shadow: 0 0 10px rgba(100, 200, 255, 0.5);
}

.info-text {
    font-size: 11px;
    opacity: 0.8;
    line-height: 1.6;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(100, 200, 255, 0.2);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin: 6px 0;
    font-size: 12px;
}

.stat-value {
    color: #ffffff;
    font-weight: bold;
}

.toggle-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(100, 200, 255, 0.2);
}

.toggle-group .control-btn {
    flex: 1;
    min-width: 100px;
    font-size: 11px;
    padding: 8px 10px;
}

/* ========================================
   AMBIENT TEMPERATURE GRADIENT
   Variable --ambient-temp-rgb se actualiza desde Temperature.js
   ======================================== */

:root {
    --ambient-temp-rgb: 5, 5, 15; /* neutral dark — updated by JS */
}

body {
    background: radial-gradient(
        ellipse at center,
        rgba(var(--ambient-temp-rgb), 0.85) 0%,
        rgba(0, 0, 0, 1) 70%
    );
    transition: background 0.8s ease;
}

/* ========================================
   PHYSICS LAB PANEL (Top Right, floating)
   ======================================== */
.physics-panel {
    position: fixed;
    top: 10px;
    right: 20px;
    width: 320px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    background: rgba(15, 20, 30, 0.95);
    border: 2px solid rgba(100, 200, 255, 0.4);
    border-radius: 12px;
    padding: 16px;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #e0e0e0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.physics-panel.hidden {
    transform: translateY(-150%);
    opacity: 0;
    pointer-events: none;
}

.physics-panel__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.physics-panel__title {
    font-size: 18px;
    font-weight: bold;
    color: #ffd700;
}

.physics-panel__warning {
    font-size: 11px;
    opacity: 0.7;
    margin-bottom: 12px;
    line-height: 1.4;
}

.physics-panel__section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(100, 200, 255, 0.3);
}

.physics-panel__section-title {
    font-weight: bold;
    margin-bottom: 8px;
    color: #ffd700;
}

.physics-panel__hint {
    font-size: 10px;
    opacity: 0.6;
    margin-top: 4px;
    text-align: center;
}

.physics-panel__actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

/* ========================================
   PHYSICS PANEL (Bottom Left)
   ======================================== */
#physicsPanel {
    position: fixed;
    bottom: 5%;
    left: 20px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(15px);
    padding: 18px 20px;
    border-radius: 16px;
    border: 1px solid rgba(100, 200, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
    font-size: 13px;
    max-width: 280px;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 100;
    color: #64c8ff;
    transition: all 0.3s ease;
}

#physicsPanel::-webkit-scrollbar       { width: 4px; }
#physicsPanel::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); border-radius: 2px; }
#physicsPanel::-webkit-scrollbar-thumb { background: rgba(100,200,255,0.3); border-radius: 2px; }

#physicsPanel.hidden {
    transform: translateY(150%);
    opacity: 0;
    pointer-events: none;
}

#physicsPanel h3 {
    margin: 0 0 12px 0;
    font-size: 16px;
    color: #ffffff;
}

/* ========================================
   TEMPERATURE PANEL (top-center, floating)
   ======================================== */
.temp-panel {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 320px;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    background: rgba(15, 20, 30, 0.96);
    border: 2px solid rgba(255, 140, 0, 0.45);
    border-radius: 14px;
    padding: 16px;
    font-family: 'Segoe UI', system-ui, sans-serif;
    font-size: 13px;
    color: #e0e0e0;
    box-shadow: 0 8px 32px rgba(255, 100, 0, 0.15), 0 4px 16px rgba(0,0,0,0.6);
    backdrop-filter: blur(12px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.temp-panel::-webkit-scrollbar       { width: 4px; }
.temp-panel::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); border-radius: 2px; }
.temp-panel::-webkit-scrollbar-thumb { background: rgba(255,140,0,0.3); border-radius: 2px; }

.temp-panel.hidden {
    transform: translateX(-50%) translateY(-150%);
    opacity: 0;
    pointer-events: none;
}

.temp-panel__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.temp-panel__title {
    font-size: 17px;
    font-weight: bold;
    color: #ff9933;
}

/* Mode toggle row */
.temp-panel__mode-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.temp-panel__mode-label {
    font-size: 11px;
    opacity: 0.7;
    white-space: nowrap;
}

.temp-panel__mode-btns {
    display: flex;
    gap: 6px;
    flex: 1;
}

.temp-mode-btn {
    flex: 1;
    padding: 5px 8px;
    border-radius: 6px;
    font-size: 11px;
    cursor: pointer;
    background: rgba(100, 100, 100, 0.2);
    border: 1px solid rgba(100, 100, 100, 0.3);
    color: #888;
    transition: all 0.2s;
}

.temp-mode-btn--active {
    background: rgba(255, 140, 0, 0.25);
    border-color: rgba(255, 140, 0, 0.6);
    color: #ff9933;
    font-weight: bold;
}

.temp-mode-btn:hover:not(.temp-mode-btn--active) {
    background: rgba(100, 100, 100, 0.35);
    color: #ccc;
}

/* Mode description */
.temp-panel__mode-desc {
    font-size: 10px;
    opacity: 0.6;
    margin-bottom: 14px;
    line-height: 1.4;
    padding: 6px 8px;
    background: rgba(255,255,255,0.04);
    border-radius: 6px;
    border-left: 2px solid rgba(255,140,0,0.4);
}

/* Enable toggle row */
.temp-panel__enable-row {
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,140,0,0.2);
}

/* Live readout */
.temp-panel__readout {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 12px;
    border: 1px solid rgba(255,140,0,0.2);
}

.temp-panel__readout-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    margin-bottom: 4px;
}

.temp-panel__readout-row:last-child { margin-bottom: 0; }

.temp-panel__readout-value {
    color: #ff9933;
    font-family: monospace;
    font-weight: bold;
}

.temp-panel__readout-phase {
    font-family: monospace;
    font-weight: bold;
}

/* Realistic mode warning */
.temp-panel__realistic-warning {
    margin-top: 12px;
    padding: 8px 10px;
    background: rgba(255, 200, 0, 0.08);
    border: 1px solid rgba(255, 200, 0, 0.3);
    border-radius: 6px;
    font-size: 10px;
    color: rgba(255, 220, 100, 0.85);
    line-height: 1.5;
}

/* Section title inside temp panel */
.temp-panel__section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #ff9933;
    opacity: 0.8;
    margin: 14px 0 8px 0;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(255, 140, 0, 0.2);
}

/* Generic panel section divider */
.panel-section {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(100, 200, 255, 0.2);
}

.panel-section--gold {
    border-top-color: rgba(255, 200, 100, 0.3);
}

.panel-section__title {
    font-weight: bold;
    margin-bottom: 8px;
    color: #ffd700;
}

.panel-section__hint {
    font-size: 10px;
    opacity: 0.6;
    margin-top: 4px;
    margin-left: 24px;
    line-height: 1.4;
}

/* Checkbox rows inside panels */
.panel-check-row {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.panel-check-row input[type="checkbox"] {
    margin-right: 8px;
}

/* Floor visibility row (checkbox + button side by side) */
.floor-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.floor-row label {
    display: flex;
    align-items: center;
    cursor: pointer;
    flex: 1;
}

.floor-row label input[type="checkbox"] {
    margin-right: 8px;
}

/* ── physicsPanel tab bar ──────────────────────────────────────────────── */

.physics-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(100, 200, 255, 0.2);
}

.physics-tab {
    flex: 1;
    padding: 7px 6px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    background: rgba(100, 200, 255, 0.07);
    border: 1px solid rgba(100, 200, 255, 0.2);
    color: rgba(100, 200, 255, 0.5);
}

.physics-tab--active {
    background: rgba(100, 200, 255, 0.2);
    border-color: rgba(100, 200, 255, 0.5);
    color: #64c8ff;
}

.physics-tab:hover:not(.physics-tab--active) {
    background: rgba(100, 200, 255, 0.12);
    color: rgba(100, 200, 255, 0.75);
}

/* Geometry section titles (inside Geometría tab) */
.geom-section-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #64c8ff;
    opacity: 0.7;
    margin: 14px 0 8px 0;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(100, 200, 255, 0.15);
}

.geom-section-title:first-child { margin-top: 0; }


.add-panel {
    position: fixed;
    bottom: 5%;
    right: 20px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(15px);
    padding: 18px 20px;
    border-radius: 16px;
    border: 1px solid rgba(100, 200, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
    font-size: 13px;
    max-width: 280px;
    z-index: 100;
    color: #64c8ff;
    transition: all 0.3s ease;
}

.add-panel.hidden {
    transform: translateY(150%);
    opacity: 0;
    pointer-events: none;
}

.add-panel h3 {
    margin: 0 0 12px 0;
    font-size: 16px;
    color: #ffffff;
    text-align: center;
}

/* Toggle bar (Moléculas / Cristales) */
.add-panel__toggle-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.add-panel__tab {
    flex: 1;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
    font-size: 13px;
}

.add-panel__tab--active {
    background: rgba(100, 200, 255, 0.3);
    border: 1px solid rgba(100, 200, 255, 0.5);
    color: #fff;
}

.add-panel__tab--inactive {
    background: rgba(50, 50, 50, 0.3);
    border: 1px solid rgba(100, 100, 100, 0.3);
    color: #888;
}

/* Crystals section grid */
.crystals-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
}

.crystal-size-label {
    display: block;
    margin-bottom: 4px;
    font-size: 11px;
    opacity: 0.8;
}

/* ========================================
   GROUP PANEL (Right side, created by JS)
   Estilos base y animaciones en GroupPanel.css
   ======================================== */

/* ========================================
   COLLAPSE BUTTONS (panel toggles)
   Estilo base azul — igual al botón ◀ Grupos
   ======================================== */

.collapse-btn {
    background: rgba(20, 20, 30, 0.95);
    border: 1px solid rgba(100, 200, 255, 0.3);
    border-radius: 6px;
    color: #64c8ff;
    padding: 8px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 101;
}

.collapse-btn:hover {
    background: rgba(30, 30, 40, 0.98);
    border-color: rgba(100, 200, 255, 0.5);
    box-shadow: 0 0 10px rgba(100, 200, 255, 0.2);
}

/* ▲ Física — bottom-left */
#collapsePhysics {
    position: fixed;
    bottom: 10px;
    left: 18px;
    z-index: 101;
}

#collapsePhysics:hover {
    transform: scale(1.05);
}

/* ▲ Agregar — bottom-right */
#collapseAdd {
    position: fixed;
    bottom: 10px;
    right: 18px;
    z-index: 101;
}

#collapseAdd:hover {
    transform: scale(1.05);
}

/* ◀ — Element selector, bottom-center */
#collapseElements {
    position: fixed;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 101;
}

#collapseElements:hover {
    transform: translateX(-50%) scale(1.05);
}

/* ◀ — Main UI panel, left side */
#collapseUI {
    position: fixed;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 101;
}

#collapseUI:hover {
    transform: translateY(-50%) scale(1.05);
}

/* ◀ Grupos — definido en GroupPanel.css */

/* ========================================
   ELEMENT SELECTOR (Bottom Center)
   ======================================== */
.element-selector {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(15px);
    padding: 16px 20px;
    border-radius: 16px;
    border: 1px solid rgba(100, 200, 255, 0.3);
    transition: all 0.3s ease;
    max-width: 95%;
    font-size: 13px;
    z-index: 100;
}

.element-selector.hidden {
    transform: translateX(-50%) translateY(150%);
    opacity: 0;
    pointer-events: none;
}

.element-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    max-height: 35vh;
    overflow-y: auto;
}

.element-btn {
    background: linear-gradient(135deg, rgba(100, 200, 255, 0.2), rgba(50, 100, 150, 0.2));
    border: 1px solid rgba(100, 200, 255, 0.5);
    color: #ffffff;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 11px;
    font-weight: bold;
    transition: all 0.2s;
    min-width: 60px;
    text-align: center;
}

.element-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(100, 200, 255, 0.4);
    background: linear-gradient(135deg, rgba(100, 200, 255, 0.4), rgba(50, 100, 150, 0.4));
}

.element-btn:active {
    transform: translateY(0);
}

.element-btn.selected {
    background: linear-gradient(135deg, #64c8ff, #3264ff);
    box-shadow: 0 0 20px rgba(100, 200, 255, 0.8);
}

.element-number {
    font-size: 9px;
    opacity: 0.7;
}

.element-symbol {
    font-size: 16px;
    margin: 4px 0;
}

.element-name {
    font-size: 8px;
    opacity: 0.8;
}

/* ========================================
   SLIDER GROUPS
   ======================================== */
.slider-group {
    margin-bottom: 12px;
}

.slider-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.slider-group input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: rgba(100, 200, 255, 0.2);
    border-radius: 3px;
    outline: none;
    accent-color: #64c8ff;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: #88ccff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(136, 204, 255, 0.5);
}

.slider-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #88ccff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Slider value display (monospace green) */
.slider-value {
    color: #88ff88;
    font-family: monospace;
}

/* ========================================
   PANEL BUTTONS
   ======================================== */

/* Close button (red X) */
.btn-close {
    background: rgba(255, 100, 100, 0.2);
    border: 1px solid rgba(255, 100, 100, 0.5);
    color: #ff6666;
    padding: 4px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.btn-close:hover {
    background: rgba(255, 100, 100, 0.35);
}

/* Reset button (blue) */
.btn-reset {
    flex: 1;
    background: rgba(100, 200, 255, 0.2);
    border: 1px solid rgba(100, 200, 255, 0.5);
    color: #88ccff;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s;
}

.btn-reset:hover {
    background: rgba(100, 200, 255, 0.35);
}

/* Random button (gold) */
.btn-random {
    flex: 1;
    background: rgba(255, 200, 100, 0.2);
    border: 1px solid rgba(255, 200, 100, 0.5);
    color: #ffcc88;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s;
}

.btn-random:hover {
    background: rgba(255, 200, 100, 0.35);
}

/* Floor visibility button */
.btn-floor-visibility {
    padding: 6px 12px;
    background: rgba(100, 200, 255, 0.2);
    border: 1px solid rgba(100, 200, 255, 0.4);
    color: #64c8ff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 11px;
    transition: all 0.2s;
}

.btn-floor-visibility.hidden-floor {
    background: rgba(100, 100, 100, 0.2);
    border-color: rgba(100, 100, 100, 0.4);
    color: #888;
}

/* Open Physics Lab button */
.btn-open-lab {
    margin-top: 10px;
    background: rgba(255, 215, 0, 0.2);
    border: 2px solid rgba(255, 215, 0, 0.5);
    color: #ffd700;
    padding: 10px 16px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    font-size: 13px;
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
    transition: all 0.2s;
    flex: 1;
}

.btn-open-lab:hover {
    background: rgba(255, 215, 0, 0.35);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

/* Open Temperature panel button */
.btn-open-temp {
    margin-top: 10px;
    background: rgba(255, 140, 0, 0.2);
    border: 2px solid rgba(255, 140, 0, 0.5);
    color: #ff9933;
    padding: 10px 16px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    font-size: 13px;
    box-shadow: 0 4px 16px rgba(255, 140, 0, 0.2);
    transition: all 0.2s;
    flex: 1;
}

.btn-open-temp:hover {
    background: rgba(255, 140, 0, 0.35);
    box-shadow: 0 6px 20px rgba(255, 140, 0, 0.35);
}

/* Container for side-by-side action buttons */
.panel-section__action-btns {
    display: flex;
    gap: 8px;
    margin-left: 0;
}

/* Delete mode button states */
.btn-delete-active {
    background: rgba(255, 50, 50, 0.3) !important;
    border-color: rgba(255, 100, 100, 0.5) !important;
}

/* ========================================
   FULLSCREEN BUTTON
   ======================================== */
.fullscreen-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(100, 200, 255, 0.15);
    border: 1px solid rgba(100, 200, 255, 0.4);
    border-radius: 6px;
    color: #64c8ff;
    width: 32px;
    height: 32px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.fullscreen-btn:hover {
    background: rgba(100, 200, 255, 0.3);
    border-color: rgba(100, 200, 255, 0.6);
    transform: scale(1.05);
}

/* ========================================
   DELETE MODAL
   ======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(5px);
}

.modal-box {
    background: rgba(20, 20, 30, 0.95);
    border: 2px solid rgba(100, 200, 255, 0.5);
    border-radius: 12px;
    padding: 25px;
    max-width: 400px;
    color: white;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

.modal-box h3 {
    margin: 0 0 15px 0;
    color: #ff6666;
}

.modal-box p {
    margin: 0 0 20px 0;
    opacity: 0.9;
    font-size: 14px;
}

.modal-box__actions {
    display: flex;
    gap: 12px;
    flex-direction: column;
}

.modal-btn {
    padding: 15px;
    border-radius: 8px;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-btn--atom {
    background: rgba(255, 100, 100, 0.2);
    border: 2px solid rgba(255, 100, 100, 0.5);
}

.modal-btn--atom:hover {
    background: rgba(255, 100, 100, 0.4);
    transform: scale(1.02);
}

.modal-btn--structure {
    background: rgba(255, 50, 50, 0.3);
    border: 2px solid rgba(255, 50, 50, 0.6);
}

.modal-btn--structure:hover {
    background: rgba(255, 50, 50, 0.5);
    transform: scale(1.02);
}

/* ========================================
   ERROR OVERLAY (debug, injected by JS)
   ======================================== */
#error-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(200, 0, 0, 0.92);
    color: #fff;
    font: 13px monospace;
    padding: 12px;
    z-index: 99999;
    max-height: 50vh;
    overflow-y: auto;
    white-space: pre-wrap;
}

/* ========================================
   UTILITY
   ======================================== */

/* NOTE: .hidden is used for ANIMATIONS (opacity + transform)
   If you need display:none, use .display-none instead */
   
.display-none {
    display: none !important;
}

/* Tab content toggle — usa display:none real, no animación */
.tab-hidden {
    display: none !important;
}

/* ========================================
   MOBILE
   ======================================== */
@media (max-width: 768px) {
    #physicsPanel {
        max-width: 90vw;
        left: 10px;
    }

    .add-panel {
        max-width: 90vw;
        right: 10px;
    }

    .physics-panel {
        width: 90vw;
        right: 5vw;
    }
}

/* ========================================
   ADD PANEL TAB SECTIONS (molecules/crystals toggle)
   ======================================== */
#moleculesSection.hidden,
#crystalsSection.hidden {
    display: none !important;
}