:root {
    --bg-dark: #0f0f13;
    --bg-card: rgba(26, 26, 36, 0.6);
    --border-glow: rgba(0, 240, 255, 0.3);
    
    --neon-cyan: #00f0ff;
    --neon-purple: #bd00ff;
    --neon-gold: #ffb700;
    --text-light: #f3f4f6;
    --text-muted: #9ca3af;
    
    /* Tile Rarity Colors */
    --common-bg: rgba(59, 130, 246, 0.25);
    --common-border: #3b82f6;
    --common-glow: rgba(59, 130, 246, 0.4);
    
    --uncommon-bg: rgba(168, 85, 247, 0.25);
    --uncommon-border: #a855f7;
    --uncommon-glow: rgba(168, 85, 247, 0.4);
    
    --rare-bg: rgba(245, 158, 11, 0.25);
    --rare-border: #f59e0b;
    --rare-glow: rgba(245, 158, 11, 0.5);
}

/* Reset and Core Styling */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none; /* Prevents default zooming/scrolling on mobile */
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

/* Game Wrapper */
/* Game Wrapper */
.game-wrapper {
    width: 100vw;
    max-width: 580px;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: calc(6px + env(safe-area-inset-top, 0px)) 8px calc(6px + env(safe-area-inset-bottom, 10px)) 8px;
    background: radial-gradient(circle at center, #1a1a26 0%, var(--bg-dark) 100%);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
    position: relative;
    box-sizing: border-box;
    overflow: hidden;
    justify-content: space-between;
}

/* Header */
.game-header {
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.game-title {
    font-family: 'Outfit', sans-serif;
    font-size: 24px;
    font-weight: 900;
    letter-spacing: 2px;
    background: linear-gradient(to right, var(--neon-cyan), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.level-indicator {
    font-family: 'Outfit', sans-serif;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--neon-cyan);
    border: 1px solid var(--neon-cyan);
    padding: 2px 6px;
    border-radius: 4px;
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.2);
    display: inline-block;
    margin-top: 2px;
}

.stats {
    display: flex;
    gap: 6px;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    padding: 3px 6px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    min-width: 65px;
}

.stat-label {
    font-size: 8px;
    font-weight: 800;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 900;
    color: #fff;
}

/* Top Controls Placement */
.top-controls {
    margin-bottom: 6px;
}

/* Timer / Rise Bar */
.timer-container {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
    background: rgba(255, 255, 255, 0.02);
    padding: 3px 6px;
    border-radius: 6px;
}

.timer-label {
    font-size: 8px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    white-space: nowrap;
}

.timer-track {
    flex-grow: 1;
    height: 5px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.timer-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--neon-cyan), var(--neon-purple));
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
    transition: width 0.1s linear;
}

/* Notifications (Combo / Cleared) */
.notification-container {
    flex-shrink: 0;
    position: relative;
    height: 24px;
    margin-bottom: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.combo-badge, .word-popup {
    position: absolute;
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    letter-spacing: 1px;
    padding: 4px 12px;
    border-radius: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
    animation: popupAnim 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.combo-badge {
    background: var(--neon-gold);
    color: #000;
    box-shadow: 0 0 15px rgba(255, 183, 0, 0.6);
}

.word-popup {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.6);
    font-size: 14px;
}

.hidden {
    display: none !important;
}

/* Board Container & Responsive Sizing */
.board-container {
    flex: 1 1 0;
    min-height: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 100%;
    margin-bottom: 4px;
    overflow: hidden;
}

.board-wrapper {
    position: relative;
    height: 100%;
    max-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.game-board {
    position: relative;
    flex: 1 1 0;
    min-height: 0;
    aspect-ratio: 8 / 14;
    width: auto;
    max-width: 100%;
    background: rgba(10, 10, 14, 0.95);
    border: 2px solid var(--border-glow);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.08), inset 0 0 25px rgba(0, 0, 0, 0.85);
    border-radius: 12px;
    overflow: hidden;
}

/* Tile Matrix Container (Leaves bottom 24px for zero-clipping floor bar) */
.tile-matrix {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 24px);
}

/* Thick Solid Cyberpunk Floor Bar (100% Tile Visibility) */
.thick-floor-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 24px;
    background: linear-gradient(to bottom, rgba(0, 240, 255, 0.4), rgba(15, 15, 25, 0.98));
    border-top: 3px solid var(--neon-cyan);
    box-shadow: 0 -4px 20px rgba(0, 240, 255, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.floor-hazard-label {
    font-family: 'Outfit', sans-serif;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 2px;
    color: rgba(0, 240, 255, 0.85);
    text-shadow: 0 0 6px rgba(0, 240, 255, 0.5);
}

.timer-countdown {
    color: var(--neon-cyan);
    font-family: 'Outfit', sans-serif;
    font-weight: 900;
    font-size: 11px;
    margin-left: 4px;
    text-shadow: 0 0 6px rgba(0, 240, 255, 0.4);
}

.vortex-btn {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.25) 0%, rgba(245, 158, 11, 0.25) 100%) !important;
    border-color: rgba(239, 68, 68, 0.5) !important;
}

/* Grid Gridlines Backdrop */
.grid-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(14, 1fr);
    pointer-events: none;
}

.grid-backdrop::before {
    content: "";
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    background-size: calc(100% / 8) calc(100% / 14);
    background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    width: 100%;
    height: 100%;
}

/* Interactive Tile styles */
.tile {
    position: absolute;
    width: calc(100% / 8);
    height: calc(100% / 14);
    padding: 1.5px;
    transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0);
    transition: transform 0.18s cubic-bezier(0.25, 1, 0.5, 1);
    cursor: grab;
    z-index: 2;
}

.tile.dragging {
    transition: none; /* Instant response during drag */
    z-index: 100;
    cursor: grabbing;
}

.tile.swapping {
    transition: transform 0.15s cubic-bezier(0.25, 1, 0.5, 1);
    z-index: 50;
}

.tile-inner {
    width: 100%;
    height: 100%;
    border-radius: 7px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    border-width: 1.5px;
    border-style: solid;
    font-weight: 800;
    box-shadow: inset 0 0 10px rgba(255, 255, 255, 0.08);
}

.tile-letter {
    font-size: clamp(20px, 3.8vh, 32px);
    font-weight: 900;
    color: #fff;
    line-height: 1;
    text-shadow: 0 1px 4px rgba(0,0,0,0.7);
}

.tile-value {
    position: absolute;
    bottom: 2px;
    right: 4px;
    font-size: clamp(9px, 1.3vh, 12px);
    color: rgba(255, 255, 255, 0.75);
    font-weight: 700;
}

/* Letter Rarity Classes */
.tile-common .tile-inner {
    background-color: var(--common-bg);
    border-color: var(--common-border);
    box-shadow: 0 0 8px var(--common-glow);
}
.tile-common .tile-letter {
    color: #e0f2fe;
}

.tile-uncommon .tile-inner {
    background-color: var(--uncommon-bg);
    border-color: var(--uncommon-border);
    box-shadow: 0 0 10px var(--uncommon-glow);
}
.tile-uncommon .tile-letter {
    color: #f3e8ff;
}

.tile-rare .tile-inner {
    background-color: var(--rare-bg);
    border-color: var(--rare-border);
    box-shadow: 0 0 12px var(--rare-glow);
    animation: goldPulse 2s infinite ease-in-out;
}
.tile-rare .tile-letter {
    color: #fef3c7;
}

/* Animations */
@keyframes goldPulse {
    0%, 100% {
        box-shadow: 0 0 10px var(--rare-glow), inset 0 0 6px rgba(255, 255, 255, 0.05);
        border-color: var(--rare-border);
    }
    50% {
        box-shadow: 0 0 18px var(--rare-border), inset 0 0 10px rgba(255, 255, 255, 0.2);
        border-color: #ffe893;
    }
}

@keyframes popupAnim {
    0% {
        transform: scale(0.4) translateY(20px);
        opacity: 0;
    }
    30% {
        transform: scale(1.1) translateY(-4px);
        opacity: 1;
    }
    80% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
    100% {
        transform: scale(0.9) translateY(-10px);
        opacity: 0;
    }
}

/* Word Clear Burst CSS effects */
.tile.clearing {
    animation: clearBurst 0.4s cubic-bezier(0.6, -0.28, 0.735, 0.045) forwards;
    pointer-events: none;
    z-index: 10;
}

@keyframes clearBurst {
    0% {
        transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0) scale(1);
        filter: brightness(1.8) saturate(1.5);
        opacity: 1;
    }
    40% {
        transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0) scale(1.2);
        filter: brightness(2.5);
        opacity: 0.9;
    }
    100% {
        transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0) scale(0);
        opacity: 0;
    }
}

/* Particle Sparks */
.spark {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 99;
    animation: sparkFly 0.5s ease-out forwards;
}

@keyframes sparkFly {
    0% {
        transform: translate3d(var(--x), var(--y), 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate3d(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty)), 0) scale(0);
        opacity: 0;
    }
}

/* Danger Heights Glow (Top rows 11+) */
.board-container::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% * 3 / 14); /* Rows 11, 12, 13 warning area */
    background: linear-gradient(to bottom, rgba(239, 68, 68, 0.15) 0%, transparent 100%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease;
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
}
.board-container.danger::after {
    opacity: 1;
    animation: pulseWarning 1.5s infinite alternate ease-in-out;
}

@keyframes pulseWarning {
    0% { background-color: rgba(239, 68, 68, 0.05); }
    100% { background-color: rgba(239, 68, 68, 0.25); }
}

/* Footer & Buttons */
.game-footer {
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 2px 0;
}

.powerup-btn {
    flex-grow: 1;
    height: 42px;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.2) 0%, rgba(59, 130, 246, 0.2) 100%);
    border: 1px solid rgba(168, 85, 247, 0.4);
    border-radius: 8px;
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 11px;
    letter-spacing: 0.5px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    position: relative;
    overflow: hidden;
    transition: transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.1);
}

.powerup-btn:active:not(:disabled) {
    transform: scale(0.97);
}

.powerup-btn:hover:not(:disabled) {
    box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
    border-color: rgba(168, 85, 247, 0.6);
}

.powerup-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cooldown-overlay {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: rgba(0, 0, 0, 0.4);
    pointer-events: none;
    transition: width 0.1s linear;
}

.control-btn {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.2s, transform 0.1s;
}

.control-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.control-btn:active {
    transform: scale(0.95);
}

/* Overlays */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(10, 10, 14, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease forwards;
}

.overlay-content {
    background: radial-gradient(circle at center, #1e1e2d 0%, #0f0f14 100%);
    border: 1px solid var(--border-glow);
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    width: 90%;
    max-width: 380px;
    text-align: center;
    transform: scale(0.9);
    animation: zoomIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.overlay h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 26px;
    font-weight: 900;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.overlay p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

/* Info Modal Styling */
.info-content {
    max-width: 440px !important;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    padding: 20px 16px !important;
}

.info-scroll-body {
    flex: 1 1 auto;
    overflow-y: auto;
    text-align: left;
    margin: 12px 0 16px 0;
    padding-right: 6px;
}

.info-section {
    margin-bottom: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(0, 240, 255, 0.15);
    border-radius: 8px;
    padding: 10px 12px;
}

.info-section h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--neon-cyan);
    margin-bottom: 6px;
}

.info-section p {
    font-size: 11px !important;
    color: var(--text-light) !important;
    margin-bottom: 4px !important;
    line-height: 1.4 !important;
}

/* Gamer Tag Input Styling */
.gamer-tag-box {
    margin: 12px 0 16px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.gamer-tag-label {
    font-family: 'Outfit', sans-serif;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--neon-cyan);
}

.gamer-tag-input {
    background: rgba(15, 15, 25, 0.8);
    border: 1.5px solid var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
    border-radius: 8px;
    padding: 8px 12px;
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 800;
    text-align: center;
    outline: none;
    width: 85%;
    max-width: 240px;
    transition: all 0.2s ease;
}

.gamer-tag-input:focus {
    border-color: var(--neon-gold);
    box-shadow: 0 0 16px rgba(255, 183, 0, 0.5);
}

/* Level Indicator Button */
.level-indicator.clickable {
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
}

.level-indicator.clickable:hover {
    box-shadow: 0 0 14px var(--neon-cyan);
    transform: scale(1.05);
}

/* Level Select Modal */
.level-select-content {
    max-width: 440px !important;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin: 16px 0;
    max-height: 50vh;
    overflow-y: auto;
}

.level-select-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 8px;
    padding: 8px 10px;
    color: #fff;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.2s ease;
}

.level-select-btn:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--neon-cyan);
    transform: translateY(-2px);
}

.level-select-btn.active {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.3), rgba(189, 0, 255, 0.3));
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

.lvl-title {
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    font-weight: 900;
    color: var(--neon-cyan);
}

.lvl-detail {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 2px;
}

.game-over-title {
    color: #ef4444 !important;
    text-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

.final-stats {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    border: 1px solid rgba(255,255,255,0.02);
}

.final-stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.final-stat-item .label {
    font-size: 10px;
    font-weight: 800;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.final-stat-item .value {
    font-family: 'Outfit', sans-serif;
    font-size: 18px;
    font-weight: 900;
    color: #fff;
}

.action-btn {
    width: 100%;
    padding: 14px 20px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 14px;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.action-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.action-btn:active {
    transform: scale(0.97);
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
    border: none;
    color: #000;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
}

.action-btn.primary:hover {
    background: linear-gradient(135deg, #4ef4ff 0%, #d845ff 100%);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes zoomIn {
    from { transform: scale(0.85); }
    to { transform: scale(1); }
}

/* Media query for smaller mobile displays */
@media (max-height: 660px) {
    .game-wrapper {
        padding: 8px;
    }
    .game-title {
        font-size: 22px;
    }
    .stat-box {
        padding: 4px 8px;
    }
    .stat-value {
        font-size: 14px;
    }
    .board-container {
        margin-bottom: 8px;
    }
}

/* Juice FX: Clear Shockwave Ring */
.clear-ring {
    position: absolute;
    width: 24px;
    height: 24px;
    border: 2.5px solid var(--neon-cyan);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    z-index: 100;
    animation: ringExpand 0.45s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
}

@keyframes ringExpand {
    0% {
        transform: translate(-50%, -50%) scale(0.4);
        border-color: var(--neon-cyan);
        box-shadow: 0 0 10px var(--neon-cyan);
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -50%) scale(3.5);
        border-color: var(--neon-purple);
        box-shadow: 0 0 25px var(--neon-purple);
        opacity: 0;
    }
}

/* Juice FX: Board Shake */
.game-board.shake {
    animation: shakeBoard 0.22s ease-in-out;
}

@keyframes shakeBoard {
    0%, 100% { transform: translate3d(0, 0, 0); }
    15%, 85% { transform: translate3d(-3px, -1.5px, 0); }
    30%, 70% { transform: translate3d(3px, 1.5px, 0); }
    45%, 55% { transform: translate3d(-4px, 3px, 0); }
}

/* Swipe Canvas Overlay */
#swipe-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

/* Hint Highlight State (Triggers only on HINT powerup click) */
.tile.hint-highlight {
    z-index: 10;
}
.tile.hint-highlight .tile-inner {
    border-color: var(--neon-gold) !important;
    box-shadow: 0 0 18px var(--neon-gold), inset 0 0 10px rgba(255, 183, 0, 0.4) !important;
    animation: hintPulse 0.6s infinite alternate ease-in-out;
}

@keyframes hintPulse {
    0% {
        box-shadow: 0 0 10px var(--neon-gold), inset 0 0 4px rgba(255, 183, 0, 0.2);
        filter: brightness(1);
    }
    100% {
        box-shadow: 0 0 25px #ffe600, inset 0 0 14px rgba(255, 230, 0, 0.7);
        filter: brightness(1.3) saturate(1.4);
    }
}

/* Word Explosion Shockwave Ring & Particles */
.word-burst-ring {
    position: absolute;
    border-radius: 12px;
    border: 3px solid var(--neon-cyan);
    box-shadow: 0 0 25px var(--neon-cyan), inset 0 0 15px var(--neon-pink);
    pointer-events: none;
    z-index: 500;
    animation: burstRingExpand 0.45s cubic-bezier(0.1, 0.9, 0.2, 1) forwards;
}

@keyframes burstRingExpand {
    0% {
        transform: scale(0.92);
        opacity: 1;
        filter: brightness(2);
    }
    50% {
        opacity: 0.85;
    }
    100% {
        transform: scale(1.15);
        opacity: 0;
        filter: brightness(0.5);
    }
}

.burst-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #00f0ff;
    box-shadow: 0 0 10px #00f0ff, 0 0 20px #bd00ff;
    pointer-events: none;
    z-index: 600;
    animation: particleFly 0.5s ease-out forwards;
}

@keyframes particleFly {
    0% {
        transform: translate(0, 0) scale(1.3);
        opacity: 1;
    }
    100% {
        transform: translate(var(--dx), var(--dy)) scale(0.1);
        opacity: 0;
    }
}

/* Fruit Ninja-style Splitting Halves */
.tile-half {
    position: absolute;
    width: calc(100% / 8);
    height: calc(100% / 14);
    pointer-events: none;
    z-index: 150;
}

.tile-half-left {
    transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0);
    clip-path: inset(0 50% 0 0); /* show left 50% only */
    animation: sliceLeft 0.5s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
}

.tile-half-right {
    transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0);
    clip-path: inset(0 0 0 50%); /* show right 50% only */
    animation: sliceRight 0.5s cubic-bezier(0.1, 0.8, 0.3, 1) forwards;
}

@keyframes sliceLeft {
    0% {
        transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0) rotate(0deg);
        opacity: 1;
        filter: brightness(1.5);
    }
    100% {
        transform: translate3d(calc(var(--col) * 100% - 50px), calc((13 - var(--row)) * 100% + 30px), 0) rotate(-40deg) scale(0.9);
        opacity: 0;
        filter: brightness(0.5);
    }
}

@keyframes sliceRight {
    0% {
        transform: translate3d(calc(var(--col) * 100%), calc((13 - var(--row)) * 100%), 0) rotate(0deg);
        opacity: 1;
        filter: brightness(1.5);
    }
    100% {
        transform: translate3d(calc(var(--col) * 100% + 50px), calc((13 - var(--row)) * 100% + 30px), 0) rotate(40deg) scale(0.9);
        opacity: 0;
        filter: brightness(0.5);
    }
}

/* Last Spelled Word HUD Style */
.last-word-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    padding: 8px 16px;
    margin-bottom: 12px;
    font-family: 'Outfit', sans-serif;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.5px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
}

.last-word-label {
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 800;
}

.last-word-text {
    color: var(--neon-cyan);
    font-weight: 900;
    text-transform: uppercase;
    font-size: 15px;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.last-word-score {
    color: var(--neon-gold);
    font-weight: 900;
    font-size: 13px;
    text-shadow: 0 0 10px rgba(255, 183, 0, 0.4);
    margin-left: 4px;
}

/* Selected active path tiles */
.tile.selected {
    z-index: 100;
}
.tile.selected .tile-inner {
    border-color: var(--neon-cyan) !important;
    box-shadow: 0 0 20px var(--neon-cyan), inset 0 0 10px rgba(0, 240, 255, 0.5) !important;
    transform: scale(1.06);
    transition: transform 0.08s ease-out;
}