@media (max-width: 600px) {
    .container {
        padding: 15px;
        margin: 10px 12px;
        width: calc(100% - 24px);
        box-sizing: border-box;
        /* Shrink the outer decorative shadow ring on mobile to prevent bleed */
        box-shadow: 
            0 0 0 2px #8a2be2,
            0 0 0 4px #1a1a2e,
            0 0 12px rgba(138, 43, 226, 0.8),
            inset 0 0 30px rgba(0, 0, 0, 0.5);
    }

    .game-board {
        width: 100%;
        box-sizing: border-box;
    }

    .tile {
        min-width: 0;
        min-height: 0;
    }
    
    h1 { 
        font-size: 16px;
        letter-spacing: 1px;
    }
    
    .subtitle {
        font-size: 8px;
    }
    
    .controls {
        gap: 8px;
    }
    
    .controls button {
        padding: 10px 8px;
        font-size: 8px;
        letter-spacing: 0.5px;
    }
    
    .difficulty-content h3 {
        font-size: 14px;
    }

    .difficulty-content {
        padding: 22px 16px;
        width: 95%;
    }

    .difficulty-btn {
        padding: 10px 16px;
    }

    .difficulty-buttons {
        gap: 7px;
    }

    .difficulty-subtitle {
        margin-bottom: 16px;
    }

    .lore-quick-actions {
        margin-bottom: 14px;
    }

    .lore-action-btn {
        font-size: 7px;
        padding: 8px 10px;
    }
    
    .diff-label {
        font-size: 10px;
    }
    
    .diff-subtitle {
        font-size: 8px;
        letter-spacing: 0.5px;
    }
    
    .diff-value {
        font-size: 8px;
    }
    
    /* Title Screen Mobile */
    .title-large {
        font-size: 32px;
        letter-spacing: 2px;
    }
    
    .title-subtitle {
        font-size: 14px;
        letter-spacing: 2px;
    }
    
    .start-button {
        font-size: 11px;
        padding: 15px 30px;
        letter-spacing: 0.5px;
    }
    
    .boolean-quote {
        font-size: 8px;
        margin-left: -15px;
        margin-right: -15px;
        padding: 15px;
        width: calc(100% + 30px);
    }
    
    .quote-author {
        font-size: 7px;
    }
    
    tile { 
        font-size: 16px; 
    }

    /* 2-digit values */
    .tile[data-value="10"],
    .tile[data-value="11"],
    .tile[data-value="12"],
    .tile[data-value="13"],
    .tile[data-value="14"],
    .tile[data-value="15"],
    .tile[data-value="16"],
    .tile[data-value="32"],
    .tile[data-value="64"] {
        font-size: 14px;
    }

    /* 3-digit values: smaller to prevent grid expansion */
    .tile[data-value="100"],
    .tile[data-value="101"],
    .tile[data-value="102"],
    .tile[data-value="103"],
    .tile[data-value="104"],
    .tile[data-value="105"],
    .tile[data-value="106"],
    .tile[data-value="107"],
    .tile[data-value="108"],
    .tile[data-value="109"],
    .tile[data-value="110"],
    .tile[data-value="111"],
    .tile[data-value="112"],
    .tile[data-value="113"],
    .tile[data-value="114"],
    .tile[data-value="115"],
    .tile[data-value="116"],
    .tile[data-value="117"],
    .tile[data-value="118"],
    .tile[data-value="119"],
    .tile[data-value="120"],
    .tile[data-value="121"],
    .tile[data-value="122"],
    .tile[data-value="123"],
    .tile[data-value="124"],
    .tile[data-value="125"],
    .tile[data-value="126"],
    .tile[data-value="127"],
    .tile[data-value="128"],
    .tile[data-value="256"],
    .tile[data-value="512"] { 
        font-size: 13px; 
    }
    
    .tile[data-value="1024"],
    .tile[data-value="2048"] { 
        font-size: 12px; 
    }
    
    .game-board {
        gap: 8px;
        padding: 8px;
    }
    
    .score-columns {
        flex-direction: column;
    }
    
    .score-column {
        max-width: 100%;
    }
    
    .score-label {
        font-size: 8px;
    }
    
    .score {
        font-size: 14px;
    }
    
    .scoreboard-content h3,
    .instructions-content h3 {
        font-size: 12px;
    }
    
    .dropdown-selected {
        font-size: 9px;
        padding: 10px 15px;
    }
    
    .dropdown-option {
        font-size: 9px;
        padding: 10px 15px;
    }
    
    .dropdown-arrow {
        font-size: 8px;
    }
    
    .mode-label {
        font-size: 9px;
    }
    
    .instructions-content {
        max-width: 95% !important;
        padding: 20px !important;
    }
    
    .instructions-content h4 {
        font-size: 11px !important;
    }
    
    .instructions-content p {
        font-size: 9px !important;
    }
    
    .instructions-content ul {
        font-size: 9px !important;
    }
    
    .gates-grid {
        grid-template-columns: 1fr !important;
    }
    
    .gate-card {
        padding: 8px !important;
    }
    
    .gate-card div {
        font-size: 9px !important;
    }
    
    .game-over h2 {
        font-size: 18px;
    }
    
    .game-over p {
        font-size: 11px;
    }

    /* Lore Screen Mobile */
    .lore-content {
        padding: 25px 18px;
    }

    .lore-quote {
        font-size: 8px;
    }

    .lore-attribution {
        font-size: 7px;
    }

    .lore-rule-text {
        font-size: 8px;
    }

    .lore-rule-highlight {
        font-size: 9px;
    }

    .lore-rule-gates {
        font-size: 11px;
    }

    .lore-continue-btn {
        font-size: 10px;
        padding: 14px 24px;
    }
}

@media (max-width: 400px) {
    h1 {
        font-size: 14px;
        letter-spacing: 0.5px;
    }
    
    .subtitle {
        font-size: 7px;
    }
    
    .score-container {
        padding: 8px 12px;
    }
    
    .score {
        font-size: 12px;
    }
    
    .score-label {
        font-size: 7px;
    }
    
    .controls {
        gap: 6px;
    }
    
    .controls button {
        padding: 8px 6px;
        font-size: 7px;
    }
    
    .difficulty-content h3 {
        font-size: 12px;
    }
    
    .diff-label {
        font-size: 9px;
    }
    
    .diff-subtitle {
        font-size: 7px;
        letter-spacing: 0px;
    }
    
    .diff-value {
        font-size: 7px;
    }
    
    .tile {
        font-size: 14px;
    }
    
    .tile[data-value="128"],
    .tile[data-value="256"],
    .tile[data-value="512"] {
        font-size: 12px;
    }
    
    .tile[data-value="1024"],
    .tile[data-value="2048"] {
        font-size: 10px;
    }
    
    /* Title Screen Small Mobile */
    .title-large {
        font-size: 24px;
        letter-spacing: 1px;
    }
    
    .title-subtitle {
        font-size: 11px;
        letter-spacing: 1px;
    }
    
    .start-button {
        font-size: 9px;
        padding: 12px 25px;
        letter-spacing: 0.5px;
    }
    
    .boolean-quote {
        font-size: 7px;
        padding: 15px;
        margin-left: -10px;
        margin-right: -10px;
        width: calc(100% + 20px);
    }
    
    .quote-author {
        font-size: 6px;
    }
    
    .dropdown-selected {
        font-size: 8px;
        padding: 8px 12px;
    }
    
    .dropdown-option {
        font-size: 8px;
        padding: 8px 12px;
    }
    
    .dropdown-arrow {
        font-size: 7px;
    }
    
    .mode-label {
        font-size: 8px;
    }

    /* Lore Screen Small Mobile */
    .lore-content {
        padding: 20px 14px;
    }

    .lore-quote {
        font-size: 7px;
    }

    .lore-attribution {
        font-size: 6px;
    }

    .lore-rule-text {
        font-size: 7px;
    }

    .lore-rule-highlight {
        font-size: 8px;
    }

    .lore-rule-gates {
        font-size: 10px;
    }

    .lore-continue-btn {
        font-size: 9px;
        padding: 12px 20px;
    }
}