@media (max-width: 768px) {
    .ai-header { display: none !important; }
}
/* ==================== MOBILE RESPONSIVE ENHANCEMENTS ==================== */
@media (max-width: 768px) {
    #gembot-3d-world,
    .world-room,
    .room-header,
    .auth-form,
    .item-detail-modal,
    .mobile-tab-nav,
    .game-panel,
    .stone-progress,
    .progress-label,
    .progress-bar,
    .progress-fill {
        max-width: 100vw !important;
        width: 100vw !important;
        box-sizing: border-box;
    }
    .room-header {
        left: 0;
        transform: none;
        padding: 10px 8px;
        border-radius: 0 0 12px 12px;
        width: 100vw;
        min-width: 0;
        max-width: 100vw;
    }
    .auth-form {
        padding: 12px 4vw;
        min-width: 0;
        max-width: 100vw;
    }
    .item-detail-modal {
        left: 0 !important;
        top: 0 !important;
        width: 100vw !important;
        height: 100vh !important;
        border-radius: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    .mobile-tab-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100vw;
        z-index: 10010;
        background: rgba(0,0,0,0.95);
        display: flex;
        justify-content: space-around;
        padding: 0.5em 0;
        border-top: 1px solid #00ffff44;
    }
    .mobile-tab-btn {
        flex: 1;
        font-size: 16px;
        padding: 10px 0;
        background: none;
        border: none;
        color: #00ffff;
    }
    .game-panel, .stone-progress {
        margin: 0 0 8vw 0;
        padding: 8px 2vw;
        border-radius: 8px;
        min-width: 0;
        max-width: 100vw;
    }
    .progress-label, .progress-bar, .progress-fill {
        font-size: 12px;
        min-width: 0;
        max-width: 100vw;
    }
    .auth-input, .auth-btn, .guest-btn {
        font-size: 16px;
        width: 100%;
        box-sizing: border-box;
    }
    .auth-input-group {
        margin-bottom: 12px;
    }
    .item-detail-content {
        padding: 12px 2vw;
    }
}
/* Utility class for academy button gradient */
.academy-gradient { background: linear-gradient(135deg, #8800ff, #006496) !important; }
/* Utility class for hidden elements */
.hidden { display: none !important; }
/* Utility classes for XP bar fill width */
.width-0 { width: 0%; }
.width-10 { width: 10%; }
.width-20 { width: 20%; }
.width-30 { width: 30%; }
.width-40 { width: 40%; }
.width-50 { width: 50%; }
.width-60 { width: 60%; }
.width-70 { width: 70%; }
.width-80 { width: 80%; }
.width-90 { width: 90%; }
.width-100 { width: 100%; }
/* Utility classes for progress bar fill width */
.width-0 { width: 0%; }
.width-10 { width: 10%; }
.width-20 { width: 20%; }
.width-30 { width: 30%; }
.width-40 { width: 40%; }
.width-50 { width: 50%; }
.width-60 { width: 60%; }
.width-70 { width: 70%; }
.width-80 { width: 80%; }
.width-90 { width: 90%; }
.width-100 { width: 100%; }
/**
 * GemBot 3D World CSS Styles
 * Futuristic cyberpunk learning environment
 */

/* ==================== 3D WORLD CONTAINER ==================== */
#gembot-3d-world {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(ellipse at center, #0a0a1a 0%, #000005 100%);
    overflow: hidden;
    perspective: 1000px;
    z-index: 1000;
}

#gembot-3d-world.hidden {
    display: none;
}

/* ==================== ROOM CONTAINER ==================== */
.world-room {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* ==================== ROOM HEADER ==================== */
.room-header {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 100;
    padding: 16px 32px;
    background: rgba(0, 0, 0, 0.7);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid var(--accent-color, #00ffff);
    border-radius: 12px;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
}

.room-header h2 {
    font-size: 24px;
    color: var(--accent-color, #00ffff);
    margin: 0 0 8px 0;
    text-shadow: 0 0 20px var(--accent-color, #00ffff);
}

.room-header p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0 0 8px 0;
    max-width: 400px;
}

.room-level {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ==================== 3D VIEWPORT ==================== */
.room-viewport {
    flex: 1;
    position: relative;
    transform-style: preserve-3d;
    perspective: 800px;
}

/* ==================== FLOOR ==================== */
.room-floor {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) rotateX(60deg);
    width: 80vmin;
    height: 80vmin;
    display: grid;
    gap: 2px;
    transform-origin: center bottom;
}

.tile {
    background: linear-gradient(135deg, 
        rgba(0, 255, 255, 0.1) 0%, 
        rgba(0, 100, 150, 0.2) 50%,
        rgba(0, 50, 100, 0.1) 100%
    );
    border: 1px solid rgba(0, 255, 255, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
}

.tile:hover {
    background: rgba(0, 255, 255, 0.3);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
    transform: translateY(-2px);
}

.tile.player-position {
    background: radial-gradient(circle, #00ffff 0%, #0088aa 100%);
    box-shadow: 0 0 20px #00ffff;
    animation: playerPulse 2s ease-in-out infinite;
}

@keyframes playerPulse {
    0%, 100% { box-shadow: 0 0 20px #00ffff; }
    50% { box-shadow: 0 0 40px #00ffff, 0 0 60px #0088ff; }
}

/* ==================== WALLS ==================== */
.room-walls {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.wall {
    position: absolute;
    background: linear-gradient(to bottom, 
        rgba(0, 50, 100, 0.8), 
        rgba(0, 20, 50, 0.9)
    );
    border: 1px solid rgba(0, 255, 255, 0.3);
}

.wall-north {
    top: 15%;
    left: 10%;
    right: 10%;
    height: 25%;
    transform: rotateX(-10deg);
}

.wall-south {
    bottom: 15%;
    left: 10%;
    right: 10%;
    height: 15%;
}

.wall-east {
    top: 15%;
    right: 5%;
    width: 10%;
    height: 60%;
    transform: rotateY(10deg);
}

.wall-west {
    top: 15%;
    left: 5%;
    width: 10%;
    height: 60%;
    transform: rotateY(-10deg);
}

.wall.has-door {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ==================== DOORS ==================== */
.door {
    pointer-events: auto;
    padding: 20px 30px;
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.8), 
        rgba(0, 50, 80, 0.6)
    );
    border: 2px solid var(--accent-color, #00ffff);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.door:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
}

.door.locked {
    border-color: #ff4444;
    opacity: 0.7;
}

.door.locked:hover {
    box-shadow: 0 0 30px rgba(255, 68, 68, 0.5);
}

.door-icon {
    font-size: 32px;
}

.door-label {
    font-size: 12px;
    color: #fff;
    font-weight: 600;
}

.door-req {
    font-size: 10px;
    color: #ff8888;
}

/* ==================== FOG EFFECT ==================== */
.room-fog {
    position: absolute;
    inset: 0;
    pointer-events: none;
    animation: fogDrift 20s ease-in-out infinite;
}

@keyframes fogDrift {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.5; }
}

/* ==================== FEATURES ==================== */
.room-features {
    position: absolute;
    bottom: 20%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    z-index: 50;
}

.feature {
    padding: 12px 20px;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--accent-color, #00ffff);
    border-radius: 8px;
    color: #fff;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.feature:hover {
    background: rgba(0, 255, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.3);
}

/* ==================== NAVIGATION BUTTONS ==================== */
.room-connections {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 100;
}

.nav-btn {
    padding: 12px 24px;
    background: linear-gradient(135deg, rgba(0, 100, 150, 0.8), rgba(0, 50, 100, 0.9));
    border: 1px solid var(--accent-color, #00ffff);
    border-radius: 8px;
    color: #fff;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 150px;
}

.nav-btn:hover {
    background: linear-gradient(135deg, rgba(0, 150, 200, 0.9), rgba(0, 100, 150, 0.9));
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
}

.nav-btn.locked {
    background: linear-gradient(135deg, rgba(100, 50, 50, 0.8), rgba(80, 30, 30, 0.9));
    border-color: #ff4444;
    cursor: not-allowed;
}

.nav-btn.locked:hover {
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.4);
    transform: none;
}

/* Navigation button positions */
.nav-north { position: absolute; bottom: 120px; }
.nav-south { position: absolute; bottom: 0; }
.nav-east { position: absolute; bottom: 60px; right: -180px; }
.nav-west { position: absolute; bottom: 60px; left: -180px; }

/* ==================== NPCs ==================== */
.room-npcs {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    gap: 30px;
    z-index: 50;
}

.npc {
    padding: 20px;
    background: radial-gradient(circle, rgba(0, 100, 150, 0.3), transparent);
    border: 2px solid rgba(0, 255, 255, 0.5);
    border-radius: 50%;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 100px;
    animation: npcFloat 3s ease-in-out infinite;
}

@keyframes npcFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.npc:hover {
    border-color: #00ffff;
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.5);
    transform: scale(1.1);
}

/* ==================== NOTIFICATIONS ==================== */
.world-notification {
    position: fixed;
    top: 100px;
    right: 30px;
    padding: 20px 30px;
    background: rgba(0, 0, 0, 0.9);
    border-left: 4px solid #00ffff;
    border-radius: 8px;
    z-index: 10000;
    animation: slideIn 0.5s ease;
    max-width: 300px;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.world-notification.fade-out {
    animation: slideOut 0.5s ease forwards;
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

.world-notification-success {
    border-color: #00ff88;
}

.world-notification-error {
    border-color: #ff4444;
}

.notification-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.notification-message {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
}

/* ==================== MINIMAP ==================== */
.world-minimap {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 200px;
    height: 200px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(0, 255, 255, 0.5);
    border-radius: 12px;
    padding: 10px;
    z-index: 500;
}

.minimap-room {
    position: absolute;
    width: 20px;
    height: 20px;
    background: rgba(0, 100, 150, 0.5);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.minimap-room.current {
    background: #00ffff;
    box-shadow: 0 0 10px #00ffff;
}

.minimap-room.locked {
    background: rgba(100, 50, 50, 0.5);
    border-color: rgba(255, 68, 68, 0.3);
}

/* ==================== PLAYER STATS HUD ==================== */
.world-hud {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(0, 255, 255, 0.5);
    border-radius: 12px;
    padding: 15px 20px;
    z-index: 500;
    min-width: 200px;
}

.hud-level {
    font-size: 20px;
    font-weight: 700;
    color: #00ffff;
    margin-bottom: 10px;
}

.hud-xp-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.hud-xp-fill {
    height: 100%;
    background: linear-gradient(90deg, #00ffff, #00ff88);
    transition: width 0.5s ease;
}

.hud-keys {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.hud-key {
    font-size: 16px;
    padding: 4px;
    background: rgba(255, 215, 0, 0.2);
    border-radius: 4px;
}

/* ==================== QUANTUM EFFECTS ==================== */
.quantum-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center,
        transparent 0%,
        rgba(136, 0, 255, 0.1) 50%,
        rgba(136, 0, 255, 0.3) 100%
    );
    pointer-events: none;
    animation: quantumPulse 4s ease-in-out infinite;
}

@keyframes quantumPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

.quantum-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #8800ff;
    border-radius: 50%;
    box-shadow: 0 0 10px #8800ff, 0 0 20px #ff00ff;
    animation: quantumFloat 5s ease-in-out infinite;
}

@keyframes quantumFloat {
    0%, 100% { 
        transform: translate(0, 0) scale(1); 
        opacity: 0.8;
    }
    25% { 
        transform: translate(50px, -30px) scale(1.2); 
        opacity: 1;
    }
    50% { 
        transform: translate(100px, 0) scale(0.8); 
        opacity: 0.6;
    }
    75% { 
        transform: translate(50px, 30px) scale(1.1); 
        opacity: 0.9;
    }
}

/* ==================== GEM DISPLAY EFFECTS ==================== */
.gem-display {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.gem-glow {
    position: absolute;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle,
        var(--gem-color, #00ffff) 0%,
        transparent 70%
    );
    animation: gemGlow 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes gemGlow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.3); opacity: 0.8; }
}

.gem-icon {
    font-size: 48px;
    filter: drop-shadow(0 0 10px var(--gem-color, #00ffff));
    animation: gemRotate 10s linear infinite;
}

@keyframes gemRotate {
    from { transform: rotateY(0deg); }
    to { transform: rotateY(360deg); }
}

/* ==================== LOADING SCREEN ==================== */
.world-loading {
    position: fixed;
    inset: 0;
    background: #000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 20000;
}

.loading-gem {
    font-size: 64px;
    animation: loadingGem 2s ease-in-out infinite;
}

@keyframes loadingGem {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.2) rotate(180deg); }
}

.loading-text {
    font-size: 18px;
    color: #00ffff;
    margin-top: 20px;
    animation: loadingPulse 1.5s ease-in-out infinite;
}

@keyframes loadingPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .room-header {
        padding: 12px 20px;
    }
    
    .room-header h2 {
        font-size: 18px;
    }
    
    .room-floor {
        width: 90vmin;
        height: 70vmin;
    }
    
    .room-features {
        flex-wrap: wrap;
        max-width: 90%;
    }
    
    .nav-east, .nav-west {
        position: static;
    }
    
    .room-connections {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 8px;
        padding: 0 10px;
    }
    
    .world-minimap {
        width: 120px;
        height: 120px;
    }
}

/* ==================== THEME VARIATIONS ==================== */
[data-theme="forge-fire"] {
    --accent-color: #ff4400;
}

[data-theme="quantum-void"] {
    --accent-color: #8800ff;
}

[data-theme="legendary"] {
    --accent-color: #ffd700;
}

[data-theme="museum-dark"] {
    --accent-color: #8855ff;
}

/* ==================== QUANTUM EFFECTS ==================== */
.quantum-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.25;
    pointer-events: none;
    z-index: 0;
    mix-blend-mode: screen;
}

.quantum-gem-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease-out;
}

.quantum-gem-modal-content {
    background: linear-gradient(145deg, rgba(20, 10, 40, 0.95), rgba(10, 5, 30, 0.95));
    border: 2px solid #8800ff;
    border-radius: 20px;
    padding: 30px;
    max-width: 400px;
    text-align: center;
    box-shadow: 
        0 0 50px rgba(136, 0, 255, 0.5),
        inset 0 0 30px rgba(136, 0, 255, 0.1);
}

.quantum-gem-modal-content h3 {
    color: #8800ff;
    font-size: 24px;
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(136, 0, 255, 0.8);
}

.quantum-gem-display {
    background: radial-gradient(circle, rgba(136, 0, 255, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    padding: 20px;
    margin: 20px 0;
}

.quantum-gem-display canvas {
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(136, 0, 255, 0.6);
}

.quantum-gem-info {
    color: #a0a0ff;
    font-size: 14px;
    margin: 20px 0;
}

.quantum-gem-info p {
    margin: 8px 0;
}

.quantum-gem-modal-content button {
    background: linear-gradient(135deg, #8800ff 0%, #6600cc 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(136, 0, 255, 0.5);
}

.quantum-gem-modal-content button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(136, 0, 255, 0.8);
}

/* Room viewport with quantum effects */
.room-viewport {
    position: relative;
}

.room-viewport .quantum-backdrop {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.room-floor,
.room-walls {
    position: relative;
    z-index: 2;
}

/* Quantum pulse animation */
@keyframes quantumPulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.4; }
}

.quantum-backdrop {
    animation: quantumPulse 4s ease-in-out infinite;
}

/* ==================== STL GALLERY ==================== */
.stl-gallery-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10001;
    overflow: hidden;
}

.stl-gallery-content {
    width: 95%;
    max-width: 1400px;
    max-height: 90vh;
    margin: 2vh auto;
    background: linear-gradient(145deg, rgba(10, 20, 40, 0.98), rgba(5, 10, 30, 0.98));
    border: 2px solid #00aaff;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 
        0 0 60px rgba(0, 170, 255, 0.3),
        inset 0 0 40px rgba(0, 170, 255, 0.1);
}

.stl-gallery-header {
    padding: 20px 30px;
    background: linear-gradient(90deg, rgba(0, 170, 255, 0.2), transparent);
    border-bottom: 1px solid rgba(0, 170, 255, 0.3);
    position: relative;
}

.stl-gallery-header h2 {
    color: #00aaff;
    font-size: 28px;
    margin: 0 0 8px 0;
    text-shadow: 0 0 20px rgba(0, 170, 255, 0.8);
}

.stl-gallery-header p {
    color: #88ccff;
    margin: 0;
    font-size: 14px;
}

.close-gallery {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 50, 50, 0.3);
    border: 1px solid #ff5555;
    color: #ff8888;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-gallery:hover {
    background: rgba(255, 50, 50, 0.6);
    transform: scale(1.1);
}

.stl-gallery-categories {
    padding: 15px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(0, 170, 255, 0.2);
}

.cat-btn {
    background: rgba(0, 170, 255, 0.1);
    border: 1px solid rgba(0, 170, 255, 0.3);
    color: #88ccff;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s ease;
}

.cat-btn:hover {
    background: rgba(0, 170, 255, 0.3);
    border-color: #00aaff;
}

.cat-btn.active {
    background: linear-gradient(135deg, #00aaff 0%, #0077cc 100%);
    color: white;
    border-color: #00aaff;
    box-shadow: 0 0 15px rgba(0, 170, 255, 0.5);
}

.stl-gallery-grid {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
}

.stl-gallery-grid::-webkit-scrollbar {
    width: 8px;
}

.stl-gallery-grid::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
}

.stl-gallery-grid::-webkit-scrollbar-thumb {
    background: rgba(0, 170, 255, 0.5);
    border-radius: 4px;
}

.stl-part {
    background: rgba(0, 50, 100, 0.3);
    border: 1px solid rgba(0, 170, 255, 0.2);
    border-radius: 12px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stl-part:hover {
    background: rgba(0, 100, 150, 0.4);
    border-color: #00aaff;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 170, 255, 0.3);
}

.stl-part img {
    width: 100%;
    height: 120px;
    object-fit: contain;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 10px;
}

.stl-part .part-name {
    font-size: 11px;
    color: #88ccff;
    text-align: center;
    line-height: 1.3;
    max-height: 2.6em;
    overflow: hidden;
}

.no-parts {
    color: #666;
    text-align: center;
    grid-column: 1 / -1;
    padding: 40px;
}

.stl-gallery-footer {
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(0, 170, 255, 0.2);
    text-align: center;
}

.stl-gallery-footer p {
    color: #88ccff;
    margin: 0;
    font-size: 13px;
}

/* STL Detail Modal */
.stl-detail-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10002;
}

.stl-detail-content {
    background: linear-gradient(145deg, rgba(10, 30, 60, 0.98), rgba(5, 15, 40, 0.98));
    border: 2px solid #00aaff;
    border-radius: 20px;
    padding: 30px;
    max-width: 500px;
    text-align: center;
    position: relative;
}

.stl-detail-content .close-detail {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255, 50, 50, 0.3);
    border: 1px solid #ff5555;
    color: #ff8888;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.stl-detail-content img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 20px;
}

.stl-detail-content h3 {
    color: #00aaff;
    font-size: 20px;
    margin: 0 0 10px 0;
}

.stl-detail-content .part-info {
    color: #88ccff;
    font-size: 14px;
    margin-bottom: 20px;
}

.part-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.action-btn {
    background: linear-gradient(135deg, #00aaff 0%, #0077cc 100%);
    border: none;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.action-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(0, 170, 255, 0.5);
}

/* ==================== NPC DIALOG ==================== */
.npc-dialog-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    animation: fadeIn 0.3s ease-out;
}

.npc-dialog-content {
    background: linear-gradient(145deg, rgba(20, 30, 60, 0.98), rgba(10, 15, 40, 0.98));
    border: 2px solid #00ccff;
    border-radius: 20px;
    padding: 30px;
    max-width: 450px;
    text-align: center;
    box-shadow: 
        0 0 60px rgba(0, 200, 255, 0.3),
        inset 0 0 30px rgba(0, 200, 255, 0.1);
}

.npc-portrait {
    font-size: 64px;
    margin-bottom: 15px;
    filter: drop-shadow(0 0 20px rgba(0, 200, 255, 0.5));
}

.npc-dialog-content h3 {
    color: #00ccff;
    font-size: 24px;
    margin: 0 0 15px 0;
    text-shadow: 0 0 15px rgba(0, 200, 255, 0.8);
}

.npc-greeting {
    color: #a0d0ff;
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 25px;
    font-style: italic;
}

.npc-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.npc-action-btn {
    background: linear-gradient(135deg, rgba(0, 150, 200, 0.3) 0%, rgba(0, 100, 150, 0.3) 100%);
    border: 1px solid rgba(0, 200, 255, 0.5);
    color: #00ccff;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.npc-action-btn:hover {
    background: linear-gradient(135deg, rgba(0, 200, 255, 0.4) 0%, rgba(0, 150, 200, 0.4) 100%);
    border-color: #00ccff;
    transform: translateX(5px);
    box-shadow: 0 0 20px rgba(0, 200, 255, 0.4);
}

.close-dialog {
    background: rgba(100, 100, 100, 0.3);
    border: 1px solid rgba(150, 150, 150, 0.5);
    color: #aaa;
    padding: 10px 25px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s ease;
}

.close-dialog:hover {
    background: rgba(150, 150, 150, 0.3);
    color: #fff;
}

/* ==================== FEATURE INTERACTIONS ==================== */
.feature {
    cursor: pointer;
    transition: all 0.3s ease;
}

.feature:hover {
    transform: scale(1.1);
    filter: brightness(1.3);
}

.npc {
    cursor: pointer;
    transition: all 0.3s ease;
}

.npc:hover {
    transform: scale(1.1) translateY(-3px);
    filter: drop-shadow(0 5px 15px rgba(0, 200, 255, 0.5));
}

/* Neural view modal */
.neural-view-modal {
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 10001;
}

.neural-view-modal canvas {
    width: 100%;
    height: 100%;
}

/* Mobile responsive for STL gallery */
@media (max-width: 768px) {
    .stl-gallery-content {
        width: 98%;
        margin: 1vh auto;
        border-radius: 12px;
    }
    
    .stl-gallery-header h2 {
        font-size: 20px;
    }
    
    .stl-gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
        padding: 12px;
    }
    
    .stl-part img {
        height: 80px;
    }
    
    .cat-btn {
        padding: 6px 12px;
        font-size: 11px;
    }
    
    .npc-dialog-content {
        margin: 20px;
        padding: 20px;
    }
    
    .npc-portrait {
        font-size: 48px;
    }
}