/* ==========================================================================
   Lamoud Periodic Table v5.2.0 — Modern CSS
   Scientifically standard color palette, legend highlighting, improved UX
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Category Colors — Scientifically Standard Palette (IUPAC-inspired) */
    --lmpt-alkali: #FF6D4A;         /* Warm red-orange */
    --lmpt-alkaline: #FFB74D;       /* Amber */
    --lmpt-transition: #64B5F6;     /* Sky blue */
    --lmpt-poor: #A1C7A8;           /* Sage green */
    --lmpt-metalloid: #81D4C2;      /* Teal */
    --lmpt-nonmetal: #AED581;       /* Lime green */
    --lmpt-halogen: #FFF176;        /* Bright yellow */
    --lmpt-noble: #CE93D8;          /* Lavender purple */
    --lmpt-lanthanoid: #F48FB1;     /* Pink */
    --lmpt-actinoid: #EF9A9A;       /* Salmon */
    --lmpt-unknown: #CFD8DC;        /* Blue grey */

    /* Darker shades for text on light backgrounds */
    --lmpt-alkali-dark: #BF360C;
    --lmpt-alkaline-dark: #E65100;
    --lmpt-transition-dark: #0D47A1;
    --lmpt-poor-dark: #2E7D32;
    --lmpt-metalloid-dark: #00695C;
    --lmpt-nonmetal-dark: #33691E;
    --lmpt-halogen-dark: #F57F17;
    --lmpt-noble-dark: #6A1B9A;
    --lmpt-lanthanoid-dark: #880E4F;
    --lmpt-actinoid-dark: #B71C1C;
    --lmpt-unknown-dark: #455A64;

    /* State Colors */
    --lmpt-solid-color: #1B2631;
    --lmpt-liquid-color: #1565C0;
    --lmpt-gas-color: #C62828;
    --lmpt-unknown-state-color: #78909C;

    /* Temperature Gradient */
    --lmpt-temp-solid: #BBDEFB;
    --lmpt-temp-liquid: #1E88E5;
    --lmpt-temp-gas: #FFCC80;

    /* UI Colors */
    --lmpt-bg: #F8F9FA;
    --lmpt-surface: #FFFFFF;
    --lmpt-border: #E2E8F0;
    --lmpt-text: #1A202C;
    --lmpt-text-secondary: #64748B;
    --lmpt-accent: #3B82F6;
    --lmpt-accent-light: #EFF6FF;
    --lmpt-accent-dark: #1D4ED8;
    --lmpt-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --lmpt-shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
    --lmpt-shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.05);
    --lmpt-radius: 12px;
    --lmpt-radius-sm: 8px;
    --lmpt-radius-xs: 4px;
    --lmpt-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

    /* Sizing */
    --lmpt-cell-size: 58px;
    --lmpt-cell-gap: 2px;
}

/* ---------- Reset scoped to plugin ---------- */
.lamoud-container,
.lamoud-container *,
.lamoud-container *::before,
.lamoud-container *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ---------- Container ---------- */
.lamoud-container {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 24px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--lmpt-text);
    background: var(--lmpt-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---------- Toolbar ---------- */
.lmpt-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-start;
    background: var(--lmpt-surface);
    border: 1px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius);
    padding: 20px 24px;
    margin-bottom: 20px;
    box-shadow: var(--lmpt-shadow);
}

.lmpt-toolbar__section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lmpt-toolbar__display {
    flex: 1 1 auto;
    min-width: 200px;
}

.lmpt-toolbar__temp {
    flex: 1 1 360px;
}

.lmpt-toolbar__label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--lmpt-text-secondary);
}

/* Chip Selectors */
.lmpt-toolbar__options {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.lmpt-chip {
    display: inline-flex;
    align-items: center;
    padding: 7px 16px;
    border: 1.5px solid var(--lmpt-border);
    border-radius: 24px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--lmpt-transition);
    user-select: none;
    background: var(--lmpt-surface);
    color: var(--lmpt-text-secondary);
    white-space: nowrap;
}

.lmpt-chip input[type="radio"] {
    display: none;
}

.lmpt-chip:hover {
    border-color: var(--lmpt-accent);
    color: var(--lmpt-accent);
    background: var(--lmpt-accent-light);
}

.lmpt-chip--active,
.lmpt-chip:has(input:checked) {
    background: var(--lmpt-accent);
    border-color: var(--lmpt-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}

/* Temperature Controls */
.lmpt-temp-control {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lmpt-temp-btn {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--lmpt-border);
    border-radius: 50%;
    background: var(--lmpt-surface);
    cursor: pointer;
    font-size: 12px;
    color: var(--lmpt-text);
    transition: all var(--lmpt-transition);
    flex-shrink: 0;
}

.lmpt-temp-btn:hover {
    background: var(--lmpt-accent);
    border-color: var(--lmpt-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}

.lmpt-range {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, #90CAF9, #1E88E5, #FF8A65);
    outline: none;
    cursor: pointer;
}

.lmpt-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--lmpt-accent);
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.lmpt-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.lmpt-range::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--lmpt-accent);
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    cursor: pointer;
}

.lmpt-temp-inputs {
    display: flex;
    gap: 12px;
    margin-top: 6px;
}

.lmpt-temp-field {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--lmpt-bg);
    border: 1.5px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius-sm);
    padding: 5px 10px;
    transition: border-color var(--lmpt-transition);
}

.lmpt-temp-field:focus-within {
    border-color: var(--lmpt-accent);
}

.lmpt-temp-field input {
    width: 60px;
    border: none;
    background: transparent;
    font-size: 13px;
    font-weight: 700;
    color: var(--lmpt-text);
    text-align: center;
    outline: none;
    -moz-appearance: textfield;
}

.lmpt-temp-field input::-webkit-outer-spin-button,
.lmpt-temp-field input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.lmpt-temp-unit {
    font-size: 12px;
    font-weight: 700;
    color: var(--lmpt-text-secondary);
}

/* Reset Button */
.lmpt-reset-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 20px;
    border: 1.5px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius-sm);
    background: var(--lmpt-surface);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--lmpt-text-secondary);
    transition: all var(--lmpt-transition);
    align-self: flex-end;
    white-space: nowrap;
}

.lmpt-reset-btn:hover {
    background: #FEF2F2;
    border-color: #EF4444;
    color: #DC2626;
}

/* ---------- Main Layout ---------- */
.lmpt-main {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

/* ---------- Table Wrapper ---------- */
.lmpt-table-wrapper {
    flex: 1;
    min-width: 0;
    background: var(--lmpt-surface);
    border: 1px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius);
    box-shadow: var(--lmpt-shadow);
    overflow: hidden;
    position: relative;
}

/* Drag Hint */
.lmpt-drag-hint {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--lmpt-accent-light);
    color: var(--lmpt-accent);
    font-size: 12px;
    font-weight: 600;
    border-bottom: 1px solid var(--lmpt-border);
    animation: lmpt-pulse 2s ease-in-out infinite;
}

@keyframes lmpt-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.lmpt-table-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--lmpt-accent) var(--lmpt-bg);
    padding: 16px;
    cursor: default;
}

.lmpt-table-scroll::-webkit-scrollbar {
    height: 6px;
}

.lmpt-table-scroll::-webkit-scrollbar-track {
    background: var(--lmpt-bg);
    border-radius: 3px;
}

.lmpt-table-scroll::-webkit-scrollbar-thumb {
    background: var(--lmpt-accent);
    border-radius: 3px;
}

.lmpt-table-scroll.lmpt-dragging {
    cursor: grabbing;
    user-select: none;
}

.lmpt-table-scroll.lmpt-grab {
    cursor: grab;
}

/* ---------- Table Grid ---------- */
.lmpt-table {
    display: flex;
    flex-direction: column;
    gap: var(--lmpt-cell-gap);
    min-width: 1050px;
}

.lmpt-row {
    display: grid;
    grid-template-columns: 40px repeat(18, 1fr);
    gap: var(--lmpt-cell-gap);
}

.lmpt-row--header {
    margin-bottom: 2px;
}

.lmpt-row--spacer {
    height: 12px;
}

.lmpt-row--f-block {
    grid-template-columns: 100px repeat(17, 1fr);
}

/* ---------- Cells ---------- */
.lmpt-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--lmpt-radius-xs);
    min-height: var(--lmpt-cell-size);
    transition: all var(--lmpt-transition);
    position: relative;
    overflow: hidden;
}

.lmpt-cell--empty {
    background: transparent;
}

.lmpt-cell--label {
    background: transparent;
    font-weight: 700;
    font-size: 12px;
    color: var(--lmpt-text-secondary);
}

.lmpt-cell--period-num {
    font-size: 14px;
    font-weight: 800;
    color: var(--lmpt-accent);
}

.lmpt-cell--group-num {
    background: var(--lmpt-accent);
    color: #fff;
    font-weight: 700;
    font-size: 12px;
    min-height: 28px;
    border-radius: var(--lmpt-radius-xs);
}

.lmpt-cell--corner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    line-height: 1.3;
    min-height: 28px;
}

.lmpt-corner-group,
.lmpt-corner-period {
    font-weight: 600;
    color: var(--lmpt-text-secondary);
    white-space: nowrap;
}

.lmpt-cell--series-label {
    font-size: 11px;
    text-align: center;
    color: var(--lmpt-text-secondary);
    padding: 2px;
}

.lmpt-cell--series-label span {
    writing-mode: horizontal-tb;
    white-space: nowrap;
}

/* Placeholder cells */
.lmpt-cell--placeholder {
    border: 2px dashed;
    cursor: default;
    font-size: 10px;
}

.lmpt-cell--placeholder.lanthanoid-ref {
    border-color: var(--lmpt-lanthanoid);
    background: rgba(244,143,177,0.12);
}

.lmpt-cell--placeholder.actinoid-ref {
    border-color: var(--lmpt-actinoid);
    background: rgba(239,154,154,0.12);
}

/* ---------- Element Cells ---------- */
.lmpt-elem {
    cursor: pointer;
    border: 2px solid transparent;
    background: var(--lmpt-surface);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    padding: 2px 1px;
    transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

.lmpt-elem:hover {
    transform: scale(1.12);
    z-index: 10;
    box-shadow: var(--lmpt-shadow-lg);
    border-color: rgba(0,0,0,0.2) !important;
}

.lmpt-elem.lmpt-elem--selected {
    transform: scale(1.12);
    z-index: 10;
    border-color: var(--lmpt-accent) !important;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.25), var(--lmpt-shadow-lg);
}

/* Element text */
.lmpt-z {
    font-size: 9px;
    font-weight: 700;
    align-self: flex-start;
    padding-left: 3px;
    opacity: 0.7;
}

.lmpt-sym {
    font-size: 18px;
    font-weight: 800;
    line-height: 1.1;
}

.lmpt-name {
    font-size: 7.5px;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    padding: 0 2px;
    opacity: 0.75;
    font-weight: 500;
}

.lmpt-mass {
    font-size: 7.5px;
    font-weight: 600;
    line-height: 1.2;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1px;
    opacity: 0.7;
}

/* ---------- Category Background Colors ---------- */
.lmpt-elem.alkali {
    background: var(--lmpt-alkali);
    color: #fff;
}
.lmpt-elem.alkali .lmpt-z,
.lmpt-elem.alkali .lmpt-name,
.lmpt-elem.alkali .lmpt-mass { color: rgba(255,255,255,0.8); }

.lmpt-elem.alkaline {
    background: var(--lmpt-alkaline);
    color: var(--lmpt-alkaline-dark);
}
.lmpt-elem.alkaline .lmpt-z,
.lmpt-elem.alkaline .lmpt-name,
.lmpt-elem.alkaline .lmpt-mass { color: var(--lmpt-alkaline-dark); opacity: 0.7; }

.lmpt-elem.transition {
    background: var(--lmpt-transition);
    color: var(--lmpt-transition-dark);
}
.lmpt-elem.transition .lmpt-z,
.lmpt-elem.transition .lmpt-name,
.lmpt-elem.transition .lmpt-mass { color: var(--lmpt-transition-dark); opacity: 0.7; }

.lmpt-elem.poor {
    background: var(--lmpt-poor);
    color: var(--lmpt-poor-dark);
}
.lmpt-elem.poor .lmpt-z,
.lmpt-elem.poor .lmpt-name,
.lmpt-elem.poor .lmpt-mass { color: var(--lmpt-poor-dark); opacity: 0.7; }

.lmpt-elem.metalloid {
    background: var(--lmpt-metalloid);
    color: var(--lmpt-metalloid-dark);
}
.lmpt-elem.metalloid .lmpt-z,
.lmpt-elem.metalloid .lmpt-name,
.lmpt-elem.metalloid .lmpt-mass { color: var(--lmpt-metalloid-dark); opacity: 0.7; }

.lmpt-elem.nonmetal {
    background: var(--lmpt-nonmetal);
    color: var(--lmpt-nonmetal-dark);
}
.lmpt-elem.nonmetal .lmpt-z,
.lmpt-elem.nonmetal .lmpt-name,
.lmpt-elem.nonmetal .lmpt-mass { color: var(--lmpt-nonmetal-dark); opacity: 0.7; }

.lmpt-elem.halogen {
    background: var(--lmpt-halogen);
    color: var(--lmpt-halogen-dark);
}
.lmpt-elem.halogen .lmpt-z,
.lmpt-elem.halogen .lmpt-name,
.lmpt-elem.halogen .lmpt-mass { color: var(--lmpt-halogen-dark); opacity: 0.7; }

.lmpt-elem.noble {
    background: var(--lmpt-noble);
    color: #fff;
}
.lmpt-elem.noble .lmpt-z,
.lmpt-elem.noble .lmpt-name,
.lmpt-elem.noble .lmpt-mass { color: rgba(255,255,255,0.8); }

.lmpt-elem.lanthanoid {
    background: var(--lmpt-lanthanoid);
    color: var(--lmpt-lanthanoid-dark);
}
.lmpt-elem.lanthanoid .lmpt-z,
.lmpt-elem.lanthanoid .lmpt-name,
.lmpt-elem.lanthanoid .lmpt-mass { color: var(--lmpt-lanthanoid-dark); opacity: 0.7; }

.lmpt-elem.actinoid {
    background: var(--lmpt-actinoid);
    color: var(--lmpt-actinoid-dark);
}
.lmpt-elem.actinoid .lmpt-z,
.lmpt-elem.actinoid .lmpt-name,
.lmpt-elem.actinoid .lmpt-mass { color: var(--lmpt-actinoid-dark); opacity: 0.7; }

.lmpt-elem.Unknown {
    background: var(--lmpt-unknown);
    color: var(--lmpt-unknown-dark);
}
.lmpt-elem.Unknown .lmpt-z,
.lmpt-elem.Unknown .lmpt-name,
.lmpt-elem.Unknown .lmpt-mass { color: var(--lmpt-unknown-dark); opacity: 0.7; }

/* State symbol colors */
.lmpt-elem.solid .lmpt-sym { color: var(--lmpt-solid-color); }
.lmpt-elem.liquid .lmpt-sym { color: var(--lmpt-liquid-color); }
.lmpt-elem.gas .lmpt-sym { color: var(--lmpt-gas-color); }
.lmpt-elem.unknownState .lmpt-sym { color: var(--lmpt-unknown-state-color); }

/* Temperature mode backgrounds */
.lmpt-elem.lmpt-temp-solid { background: var(--lmpt-temp-solid) !important; }
.lmpt-elem.lmpt-temp-liquid { background: var(--lmpt-temp-liquid) !important; color: #fff !important; }
.lmpt-elem.lmpt-temp-gas { background: var(--lmpt-temp-gas) !important; }
.lmpt-elem.lmpt-temp-unknown { background: var(--lmpt-unknown) !important; }

.lmpt-elem.lmpt-temp-solid .lmpt-sym { color: var(--lmpt-solid-color) !important; }
.lmpt-elem.lmpt-temp-liquid .lmpt-sym { color: #fff !important; }
.lmpt-elem.lmpt-temp-gas .lmpt-sym { color: #7B341E !important; }
.lmpt-elem.lmpt-temp-unknown .lmpt-sym { color: #fff !important; }

.lmpt-elem.lmpt-temp-liquid .lmpt-z,
.lmpt-elem.lmpt-temp-liquid .lmpt-name,
.lmpt-elem.lmpt-temp-liquid .lmpt-mass { color: rgba(255,255,255,0.85) !important; opacity: 1 !important; }

/* ---------- Category Highlight Mode ---------- */
.lmpt-elem.lmpt-dimmed {
    opacity: 0.15;
    filter: grayscale(0.9);
    transform: scale(0.97);
}

.lmpt-elem.lmpt-highlighted {
    box-shadow: var(--lmpt-shadow-md);
    transform: scale(1.02);
    z-index: 5;
}

/* ---------- Display Mode Styles ---------- */
.lmpt-xray-k, .lmpt-xray-l, .lmpt-xray-m {
    font-size: 6px;
    line-height: 1;
    display: flex;
    align-items: center;
    gap: 1px;
}

.lmpt-xray-label {
    font-weight: 700;
    font-size: 5px;
    opacity: 0.6;
}

.lmpt-iso-known {
    background: #2E7D32;
    color: #fff;
    padding: 0 3px;
    border-radius: 3px;
    font-size: 7px;
    font-weight: 700;
}

.lmpt-iso-stable {
    background: #1565C0;
    color: #fff;
    padding: 0 3px;
    border-radius: 3px;
    font-size: 7px;
    font-weight: 700;
}

.lmpt-ionic {
    font-size: 7px;
    font-weight: 700;
}

/* ---------- Legend ---------- */
.lmpt-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    padding: 16px 0 4px;
    margin-top: 10px;
    border-top: 1px solid var(--lmpt-border);
}

.lmpt-legend__section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lmpt-legend__title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--lmpt-text-secondary);
}

.lmpt-legend__items {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.lmpt-legend__item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 10px;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--lmpt-transition);
    border: 2px solid transparent;
    user-select: none;
}

.lmpt-legend__item[data-category]:hover {
    transform: scale(1.05);
    box-shadow: var(--lmpt-shadow-md);
}

.lmpt-legend__item--active {
    border-color: var(--lmpt-text) !important;
    box-shadow: var(--lmpt-shadow-md) !important;
    transform: scale(1.08) !important;
}

.lmpt-legend--alkali { background: var(--lmpt-alkali); color: #fff; }
.lmpt-legend--alkaline { background: var(--lmpt-alkaline); color: var(--lmpt-alkaline-dark); }
.lmpt-legend--transition { background: var(--lmpt-transition); color: var(--lmpt-transition-dark); }
.lmpt-legend--poor { background: var(--lmpt-poor); color: var(--lmpt-poor-dark); }
.lmpt-legend--metalloid { background: var(--lmpt-metalloid); color: var(--lmpt-metalloid-dark); }
.lmpt-legend--nonmetal { background: var(--lmpt-nonmetal); color: var(--lmpt-nonmetal-dark); }
.lmpt-legend--halogen { background: var(--lmpt-halogen); color: var(--lmpt-halogen-dark); }
.lmpt-legend--noble { background: var(--lmpt-noble); color: #fff; }
.lmpt-legend--lanthanoid { background: var(--lmpt-lanthanoid); color: var(--lmpt-lanthanoid-dark); }
.lmpt-legend--actinoid { background: var(--lmpt-actinoid); color: var(--lmpt-actinoid-dark); }
.lmpt-legend--unknown { background: var(--lmpt-unknown); color: var(--lmpt-unknown-dark); }

.lmpt-state-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.lmpt-state-dot--solid { background: var(--lmpt-temp-solid); border: 1px solid var(--lmpt-solid-color); }
.lmpt-state-dot--liquid { background: var(--lmpt-temp-liquid); }
.lmpt-state-dot--gas { background: var(--lmpt-temp-gas); }
.lmpt-state-dot--unknown { background: var(--lmpt-unknown); }

.lmpt-legend--solid-state,
.lmpt-legend--liquid-state,
.lmpt-legend--gas-state,
.lmpt-legend--unknown-state {
    background: var(--lmpt-bg);
    border: 1.5px solid var(--lmpt-border);
    cursor: default;
}

/* ---------- Details Panel ---------- */
.lmpt-details {
    width: 310px;
    min-width: 290px;
    flex-shrink: 0;
    background: var(--lmpt-surface);
    border: 1px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius);
    box-shadow: var(--lmpt-shadow);
    overflow: hidden;
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
    scrollbar-width: thin;
}

.lmpt-details::-webkit-scrollbar {
    width: 4px;
}

.lmpt-details::-webkit-scrollbar-thumb {
    background: var(--lmpt-border);
    border-radius: 2px;
}

.lmpt-details__close {
    display: none;
    position: absolute;
    top: 12px;
    right: 12px;
    width: 34px;
    height: 34px;
    border: none;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    color: var(--lmpt-text-secondary);
    z-index: 5;
    align-items: center;
    justify-content: center;
    transition: all var(--lmpt-transition);
    backdrop-filter: blur(4px);
}

.lmpt-details__close:hover {
    background: #FEF2F2;
    color: #DC2626;
}

.lmpt-details__header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    color: #fff;
    position: relative;
}

/* Category-colored headers */
.lmpt-cat-alkali { background: var(--lmpt-alkali); }
.lmpt-cat-alkaline { background: var(--lmpt-alkaline); color: var(--lmpt-alkaline-dark); }
.lmpt-cat-transition { background: var(--lmpt-transition); color: var(--lmpt-transition-dark); }
.lmpt-cat-poor { background: var(--lmpt-poor); color: var(--lmpt-poor-dark); }
.lmpt-cat-metalloid { background: var(--lmpt-metalloid); color: var(--lmpt-metalloid-dark); }
.lmpt-cat-nonmetal { background: var(--lmpt-nonmetal); color: var(--lmpt-nonmetal-dark); }
.lmpt-cat-halogen { background: var(--lmpt-halogen); color: var(--lmpt-halogen-dark); }
.lmpt-cat-noble { background: var(--lmpt-noble); }
.lmpt-cat-lanthanoid { background: var(--lmpt-lanthanoid); color: var(--lmpt-lanthanoid-dark); }
.lmpt-cat-actinoid { background: var(--lmpt-actinoid); color: var(--lmpt-actinoid-dark); }
.lmpt-cat-unknown { background: var(--lmpt-unknown); color: var(--lmpt-unknown-dark); }

.lmpt-details__symbol {
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
    min-width: 60px;
    text-align: center;
}

.lmpt-details__header-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.lmpt-details__name {
    font-size: 18px;
    font-weight: 700;
}

.lmpt-details__ar-name {
    font-size: 14px;
    opacity: 0.8;
    direction: rtl;
}

.lmpt-details__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 0;
}

.lmpt-detail-item {
    padding: 10px 14px;
    border-bottom: 1px solid var(--lmpt-border);
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.lmpt-detail-item:nth-child(odd) {
    border-right: 1px solid var(--lmpt-border);
}

.lmpt-detail-item--wide {
    grid-column: 1 / -1;
    border-right: none !important;
}

.lmpt-detail-label {
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--lmpt-text-secondary);
}

.lmpt-detail-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--lmpt-text);
    word-break: break-word;
}

.lmpt-detail-value--row {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.lmpt-detail-item--interactive {
    background: #F8FAFC;
}

.lmpt-detail-select {
    appearance: auto;
    -webkit-appearance: auto;
    -moz-appearance: auto;
    background: var(--lmpt-surface);
    border: 1.5px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius-xs);
    padding: 3px 6px;
    font-size: 11px;
    font-weight: 700;
    color: var(--lmpt-accent);
    cursor: pointer;
    min-width: 60px;
    transition: border-color var(--lmpt-transition);
}

.lmpt-detail-select:focus {
    outline: none;
    border-color: var(--lmpt-accent);
    box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}

.lmpt-detail-select:hover {
    border-color: var(--lmpt-accent);
}

.lmpt-detail-input {
    background: var(--lmpt-surface);
    border: 1.5px solid var(--lmpt-border);
    border-radius: var(--lmpt-radius-xs);
    padding: 3px 6px;
    font-size: 12px;
    font-weight: 700;
    color: var(--lmpt-text);
    width: 70px;
    text-align: center;
    transition: border-color var(--lmpt-transition);
}

.lmpt-detail-input:focus {
    outline: none;
    border-color: var(--lmpt-accent);
    box-shadow: 0 0 0 2px rgba(59,130,246,0.15);
}

.lmpt-detail-state-result {
    font-size: 12px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: var(--lmpt-radius-xs);
    background: var(--lmpt-accent-light);
    color: var(--lmpt-accent);
    white-space: nowrap;
}

/* ---------- Mobile Overlay ---------- */
.lmpt-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9998;
    backdrop-filter: blur(4px);
}

.lmpt-overlay.lmpt-overlay--visible {
    display: block;
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Large desktop */
@media screen and (min-width: 1400px) {
    .lmpt-details {
        width: 350px;
    }
}

/* Tablet */
@media screen and (max-width: 1100px) {
    .lmpt-main {
        flex-direction: column;
    }

    .lmpt-details {
        width: 100%;
        position: static;
        max-height: none;
        display: none;
    }

    .lmpt-details.lmpt-details--visible {
        display: block;
    }
}

/* Mobile */
@media screen and (max-width: 768px) {
    .lamoud-container {
        padding: 12px;
    }

    .lmpt-toolbar {
        padding: 14px;
        gap: 14px;
    }

    .lmpt-toolbar__display {
        min-width: 100%;
    }

    .lmpt-toolbar__options {
        gap: 4px;
    }

    .lmpt-chip {
        padding: 5px 10px;
        font-size: 11px;
    }

    .lmpt-temp-inputs {
        flex-wrap: wrap;
        gap: 8px;
    }

    .lmpt-temp-field {
        flex: 1;
        min-width: 80px;
    }

    .lmpt-temp-field input {
        width: 50px;
    }

    .lmpt-drag-hint {
        display: flex;
    }

    .lmpt-table-scroll {
        padding: 10px;
    }

    .lmpt-table-scroll.lmpt-grab {
        cursor: grab;
    }

    /* Details as modal overlay on mobile */
    .lmpt-details {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 70vh;
        border-radius: var(--lmpt-radius) var(--lmpt-radius) 0 0;
        box-shadow: var(--lmpt-shadow-lg);
        z-index: 9999;
        display: none;
        overflow-y: auto;
        transform: translateY(100%);
        transition: transform 0.3s ease;
    }

    .lmpt-details.lmpt-details--visible {
        display: block;
        transform: translateY(0);
    }

    .lmpt-details__close {
        display: flex;
    }

    .lmpt-details__header {
        padding: 16px;
        position: sticky;
        top: 0;
        z-index: 2;
    }

    .lmpt-details__symbol {
        font-size: 36px;
    }

    .lmpt-details__name {
        font-size: 16px;
    }

    .lmpt-reset-btn {
        align-self: center;
        width: 100%;
        justify-content: center;
    }
}

/* Small mobile */
@media screen and (max-width: 480px) {
    .lmpt-chip {
        padding: 4px 8px;
        font-size: 10px;
    }

    .lmpt-details__grid {
        grid-template-columns: 1fr;
    }

    .lmpt-detail-item:nth-child(odd) {
        border-right: none;
    }

    .lmpt-legend {
        flex-direction: column;
        gap: 12px;
    }
}

/* Print */
@media print {
    .lmpt-toolbar,
    .lmpt-drag-hint,
    .lmpt-details__close,
    .lmpt-reset-btn {
        display: none !important;
    }

    .lmpt-table-scroll {
        overflow: visible;
    }

    .lmpt-table {
        min-width: auto;
    }
}