/* ===== EXPERIMENTS PAGE ENHANCED STYLING ===== */

/* Experiments Introduction Section */
.experiments-intro {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, 
        rgba(255, 71, 87, 0.05) 0%, 
        rgba(58, 66, 250, 0.05) 50%, 
        rgba(0, 212, 255, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.experiments-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="molecules" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="5" cy="5" r="0.5" fill="rgba(0,212,255,0.2)"/><circle cx="15" cy="15" r="0.5" fill="rgba(255,71,87,0.2)"/></pattern></defs><rect width="100" height="100" fill="url(%23molecules)"/></svg>') repeat;
    opacity: 0.3;
    animation: moleculeDrift 30s linear infinite;
    z-index: -1;
}

@keyframes moleculeDrift {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-20px, -20px); }
}

.experiments-intro h2 {
    font-size: 3rem;
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--science), var(--humanities));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.experiments-intro .lead {
    font-size: 1.25rem;
    text-align: center;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Enhanced Experiments Catalog */
.experiments-catalog {
    padding: 4rem 2rem;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    margin: 2rem auto;
    max-width: 1400px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow-hover);
    position: relative;
}

.experiments-catalog h3 {
    font-size: 2.5rem;
    font-family: var(--font-primary);
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
}

.experiments-catalog h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--science), var(--accent-primary), var(--humanities));
    border-radius: 2px;
}

/* Advanced Experiments Grid */
.experiments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

/* Sophisticated Experiment Cards */
.experiment-card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 
        var(--glass-shadow),
        inset 0 1px 0 var(--glass-highlight);
}

.experiment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(255, 71, 87, 0.05) 0%, 
        transparent 30%, 
        rgba(0, 212, 255, 0.05) 70%, 
        transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.experiment-card:hover::before {
    opacity: 1;
}

.experiment-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(0, 212, 255, 0.2),
        inset 0 1px 0 var(--glass-highlight);
    border-color: rgba(0, 212, 255, 0.3);
}

.experiment-card h4 {
    font-size: 1.5rem;
    font-family: var(--font-primary);
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
}

.experiment-card h4::before {
    content: '🧪';
    font-size: 1.2rem;
    margin-right: 0.5rem;
    opacity: 0.8;
}

.experiment-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* Enhanced Experiment Buttons */
.experiment-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--science));
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.experiment-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.experiment-btn:hover::before {
    left: 100%;
}

.experiment-btn:hover {
    background: linear-gradient(135deg, var(--science), var(--accent-primary));
    transform: translateY(-2px);
    box-shadow: 
        0 8px 20px rgba(0, 212, 255, 0.3),
        0 0 20px rgba(255, 71, 87, 0.2);
}

/* Hidden experiment button state */
.experiment-btn-hidden {
    display: none !important;
}

/* Show experiment button state */
.experiment-btn-visible {
    display: inline-block !important;
}

/* Laboratory Workspace */
.laboratory-workspace {
    padding: 4rem 2rem;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    margin: 2rem auto;
    max-width: 1400px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow-hover);
    position: relative;
}

.laboratory-workspace h3 {
    font-size: 2.5rem;
    font-family: var(--font-primary);
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

/* Workspace Header */
.workspace-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.workspace-header h4 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0;
}

.workspace-controls {
    display: flex;
    gap: 1rem;
}

.control-btn {
    padding: 0.75rem 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.control-btn:not(:disabled):hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

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

/* Experiment Workspace */
.experiment-workspace {
    min-height: 400px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 20px;
    padding: 2rem;
    border: 2px dashed rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.experiment-placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 4rem 2rem;
}

.experiment-placeholder p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.lab-equipment-icons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.lab-equipment-icons .equipment {
    font-size: 3rem;
    opacity: 0.3;
    animation: float 3s ease-in-out infinite;
    transition: all 0.3s ease;
}

.lab-equipment-icons .equipment:hover {
    opacity: 0.8;
    transform: scale(1.2);
}

.lab-equipment-icons .equipment:nth-child(1) { animation-delay: 0s; }
.lab-equipment-icons .equipment:nth-child(2) { animation-delay: 0.6s; }
.lab-equipment-icons .equipment:nth-child(3) { animation-delay: 1.2s; }
.lab-equipment-icons .equipment:nth-child(4) { animation-delay: 1.8s; }
.lab-equipment-icons .equipment:nth-child(5) { animation-delay: 2.4s; }

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

/* Experiment Interface */
.experiment-interface {
    display: grid;
    grid-template-columns: 1fr 2fr;
    grid-template-rows: auto 1fr auto;
    gap: 2rem;
    min-height: 500px;
}

.experiment-header {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

.safety-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-secondary);
    font-size: 0.9rem;
}

.safety-icon {
    font-size: 1.2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Experiment Controls */
.experiment-controls {
    background: var(--glass-bg);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--glass-border);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    margin-bottom: 0.5rem;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.experiment-button {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--science));
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem;
}

.experiment-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

/* Experiment Modal Styles */
.experiment-modal-content {
    max-width: 1000px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
}

.experiment-modal-content .modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.experiment-modal-content .modal-header h2 {
    color: var(--accent-primary);
    font-size: 1.5rem;
    margin: 0;
}

.experiment-modal-content .modal-body {
    padding: 2rem;
}

.experiment-area {
    min-height: 400px;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    background: rgba(0, 212, 255, 0.05);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.experiment-area::before {
    content: '🧪 Experiment Area';
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0.7;
}

.experiment-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.experiment-controls .btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
}

.experiment-controls .btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--science));
    color: white;
}

.experiment-controls .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.3);
}

.experiment-controls .btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.experiment-controls .btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.experiment-controls .btn-warning {
    background: linear-gradient(135deg, #ff9500, #ff6b35);
    color: white;
}

.experiment-controls .btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 149, 0, 0.3);
}

/* Experiment Card Completed State */
.experiment-btn.completed {
    background: linear-gradient(135deg, #00d084, #00c46a) !important;
    color: white !important;
    cursor: default;
}

.experiment-btn.completed:hover {
    transform: none !important;
}

.experiment-btn.completed span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ===== ENHANCED VISUAL SMOOTHNESS & PERFORMANCE OPTIMIZATIONS ===== */

/* GPU-accelerated base animations */
.experiment-card,
.experiment-btn,
.control-btn,
.experiment-button,
.beaker,
.electrode,
.half-cell,
.flame,
.molecule,
.monomer,
.droplet,
.particle,
.floating-molecule {
    will-change: transform;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Smoother easing functions for all transitions */
.experiment-card {
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.experiment-btn,
.experiment-button,
.control-btn {
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Enhanced flame animation with smoother flickering */
@keyframes flicker-smooth {
    0% { 
        transform: translateX(-50%) scale(1) rotate(0deg);
        filter: brightness(1) hue-rotate(0deg);
    }
    25% {
        transform: translateX(-50%) scale(1.05) rotate(1deg);
        filter: brightness(1.1) hue-rotate(5deg);
    }
    50% {
        transform: translateX(-50%) scale(1.08) rotate(-1deg);
        filter: brightness(1.15) hue-rotate(-3deg);
    }
    75% {
        transform: translateX(-50%) scale(1.03) rotate(0.5deg);
        filter: brightness(1.05) hue-rotate(8deg);
    }
    100% { 
        transform: translateX(-50%) scale(1) rotate(0deg);
        filter: brightness(1) hue-rotate(0deg);
    }
}

.flame {
    animation: flicker-smooth 0.8s ease-in-out infinite;
}

/* Improved particle system with staggered timing */
@keyframes particle-rise-enhanced {
    0% {
        bottom: 20%;
        opacity: 1;
        transform: translateX(0) scale(1);
        filter: blur(0px);
    }
    25% {
        opacity: 0.9;
        transform: translateX(5px) scale(1.1);
        filter: blur(0.5px);
    }
    50% {
        opacity: 0.7;
        transform: translateX(10px) scale(0.9);
        filter: blur(1px);
    }
    75% {
        opacity: 0.4;
        transform: translateX(15px) scale(0.7);
        filter: blur(1.5px);
    }
    100% {
        bottom: 100%;
        opacity: 0;
        transform: translateX(20px) scale(0.5);
        filter: blur(2px);
    }
}

.particle {
    animation: particle-rise-enhanced 3s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Smoother droplet animation with bounce effect */
@keyframes droplet-fall-smooth {
    0% { 
        opacity: 1; 
        transform: translateX(-50%) translateY(0) scale(1);
    }
    10% {
        transform: translateX(-50%) translateY(5px) scale(1.1);
    }
    90% {
        opacity: 0.8;
        transform: translateX(-50%) translateY(45px) scale(0.8);
    }
    100% { 
        opacity: 0; 
        transform: translateX(-50%) translateY(50px) scale(0.6);
    }
}

.droplet {
    animation: droplet-fall-smooth 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Enhanced bubble animation with more realistic physics */
@keyframes bubble-rise-realistic {
    0% {
        bottom: 0;
        opacity: 1;
        transform: translateX(0) scale(0.8);
    }
    20% {
        opacity: 0.9;
        transform: translateX(2px) scale(1);
    }
    40% {
        opacity: 0.8;
        transform: translateX(-1px) scale(1.1);
    }
    60% {
        opacity: 0.6;
        transform: translateX(3px) scale(0.9);
    }
    80% {
        opacity: 0.3;
        transform: translateX(-2px) scale(0.7);
    }
    100% {
        bottom: 100%;
        opacity: 0;
        transform: translateX(10px) scale(0.5);
    }
}

.bubble {
    animation: bubble-rise-realistic 2.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Smooth molecular vibration with organic feel */
@keyframes molecular-vibration-smooth {
    0% { transform: translate(0, 0) rotate(0deg); }
    10% { transform: translate(0.5px, 0.5px) rotate(0.2deg); }
    20% { transform: translate(-0.5px, 0.5px) rotate(-0.1deg); }
    30% { transform: translate(0.5px, -0.5px) rotate(0.3deg); }
    40% { transform: translate(-0.5px, -0.5px) rotate(-0.2deg); }
    50% { transform: translate(0.5px, 0) rotate(0.1deg); }
    60% { transform: translate(-0.5px, 0) rotate(-0.3deg); }
    70% { transform: translate(0, 0.5px) rotate(0.2deg); }
    80% { transform: translate(0, -0.5px) rotate(-0.1deg); }
    90% { transform: translate(0.2px, 0.2px) rotate(0.05deg); }
    100% { transform: translate(0, 0) rotate(0deg); }
}

.molecule.vibrating {
    animation: molecular-vibration-smooth 0.15s ease-in-out infinite;
}

/* Enhanced ion movement with curved paths */
@keyframes ion-movement-curved {
    0% { 
        left: 10%; 
        opacity: 1; 
        transform: translateY(0) scale(1);
    }
    25% { 
        left: 35%;
        opacity: 0.9; 
        transform: translateY(-5px) scale(1.1);
    }
    50% { 
        left: 60%;
        opacity: 0.8; 
        transform: translateY(-8px) scale(1.2);
    }
    75% {
        left: 80%;
        opacity: 0.5;
        transform: translateY(-3px) scale(0.9);
    }
    100% { 
        left: 90%; 
        opacity: 0.2; 
        transform: translateY(0) scale(0.7);
    }
}

.ion {
    animation: ion-movement-curved 3.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Smoother polymer bond formation */
@keyframes polymer-bond-smooth {
    0% { 
        transform: scale(1) rotate(0deg);
        box-shadow: 0 0 5px rgba(255, 107, 107, 0.3);
    }
    25% { 
        transform: scale(1.15) rotate(45deg);
        box-shadow: 0 0 15px rgba(255, 107, 107, 0.6);
    }
    50% { 
        transform: scale(1.3) rotate(180deg);
        box-shadow: 0 0 25px rgba(0, 212, 255, 0.8);
    }
    75% { 
        transform: scale(1.15) rotate(270deg);
        box-shadow: 0 0 15px rgba(78, 205, 196, 0.6);
    }
    100% { 
        transform: scale(1) rotate(360deg);
        box-shadow: 0 0 5px rgba(78, 205, 196, 0.3);
    }
}

.monomer.reacting {
    animation: polymer-bond-smooth 1.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Enhanced floating molecule animation */
@keyframes float-molecule-enhanced {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
        opacity: 0.6;
        filter: blur(0px);
    }
    25% {
        transform: translateY(-15px) rotate(90deg) scale(1.05);
        opacity: 0.8;
        filter: blur(0.5px);
    }
    50% {
        transform: translateY(-25px) rotate(180deg) scale(1.1);
        opacity: 1;
        filter: blur(0px);
    }
    75% {
        transform: translateY(-15px) rotate(270deg) scale(1.05);
        opacity: 0.8;
        filter: blur(0.5px);
    }
}

.floating-molecule {
    animation: float-molecule-enhanced 8s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
}

/* Improved spinning animation for mixing */
@keyframes spin-smooth {
    0% { 
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
        border-top-color: var(--accent-primary);
    }
    25% {
        transform: translate(-50%, -50%) rotate(90deg) scale(1.05);
        border-top-color: var(--science);
    }
    50% {
        transform: translate(-50%, -50%) rotate(180deg) scale(1.1);
        border-top-color: var(--humanities);
    }
    75% {
        transform: translate(-50%, -50%) rotate(270deg) scale(1.05);
        border-top-color: var(--technology);
    }
    100% { 
        transform: translate(-50%, -50%) rotate(360deg) scale(1);
        border-top-color: var(--accent-primary);
    }
}

.mixing-animation.active {
    animation: spin-smooth 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Enhanced equipment glow effects */
.beaker.active,
.electrode.active,
.half-cell.active {
    animation: equipment-glow 2s ease-in-out infinite alternate;
}

@keyframes equipment-glow {
    0% { 
        filter: brightness(1);
        box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
    }
    100% { 
        filter: brightness(1.3);
        box-shadow: 0 0 25px rgba(0, 212, 255, 0.8);
    }
}

/* Smooth progress bar animation */
@keyframes progress-shine-enhanced {
    0% { 
        left: -100%;
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% { 
        left: 100%;
        opacity: 0;
    }
}

.progress-fill::after {
    animation: progress-shine-enhanced 2.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Enhanced hover effects with micro-interactions */
.experiment-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.25),
        0 0 40px rgba(0, 212, 255, 0.15),
        inset 0 1px 0 var(--glass-highlight);
    border-color: rgba(0, 212, 255, 0.4);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

/* Smooth temperature change visualization */
@keyframes temperature-pulse {
    0% { 
        filter: hue-rotate(0deg) brightness(1);
    }
    25% {
        filter: hue-rotate(15deg) brightness(1.1);
    }
    50% {
        filter: hue-rotate(30deg) brightness(1.2);
    }
    75% {
        filter: hue-rotate(15deg) brightness(1.1);
    }
    100% { 
        filter: hue-rotate(0deg) brightness(1);
    }
}

.temperature-display {
    animation: temperature-pulse 3s ease-in-out infinite;
}

/* Enhanced chromatography spot migration */
@keyframes spot-migration-smooth {
    0% { 
        bottom: 20px; 
        opacity: 0.3;
        transform: scale(0.8);
    }
    10% { 
        opacity: 0.6;
        transform: scale(0.9);
    }
    20% { 
        opacity: 1;
        transform: scale(1);
    }
    80% {
        opacity: 1;
        transform: scale(1);
    }
    90% {
        opacity: 0.8;
        transform: scale(0.95);
    }
    100% { 
        opacity: 0.7;
        transform: scale(0.9);
    }
}

.chromatography-paper.running .sample-spots .spot {
    animation: spot-migration-smooth 8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Enhanced achievement notification animation */
@keyframes achievement-slide-in {
    0% {
        transform: translateX(120%);
        opacity: 0;
        filter: blur(2px);
    }
    30% {
        transform: translateX(-10px);
        opacity: 0.8;
        filter: blur(0px);
    }
    40% {
        transform: translateX(5px);
        opacity: 0.9;
    }
    50% {
        transform: translateX(-2px);
        opacity: 1;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
        filter: blur(0px);
    }
}

.achievement-notification.show {
    animation: achievement-slide-in 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Smooth voltage meter needle movement */
@keyframes needle-sweep {
    0% { 
        transform: translateX(-50%) rotate(-45deg);
    }
    50% {
        transform: translateX(-50%) rotate(0deg);
    }
    100% { 
        transform: translateX(-50%) rotate(45deg);
    }
}

.meter-needle.active {
    animation: needle-sweep 2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Enhanced loading animation */
@keyframes loading-spin-smooth {
    0% { 
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
        filter: hue-rotate(0deg);
    }
    25% {
        transform: translate(-50%, -50%) rotate(90deg) scale(1.05);
        filter: hue-rotate(90deg);
    }
    50% {
        transform: translate(-50%, -50%) rotate(180deg) scale(1.1);
        filter: hue-rotate(180deg);
    }
    75% {
        transform: translate(-50%, -50%) rotate(270deg) scale(1.05);
        filter: hue-rotate(270deg);
    }
    100% { 
        transform: translate(-50%, -50%) rotate(360deg) scale(1);
        filter: hue-rotate(360deg);
    }
}

.experiment-interface.loading::after {
    animation: loading-spin-smooth 2s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Performance optimizations for reduced motion */
@media (prefers-reduced-motion: reduce) {
    .experiment-card,
    .experiment-btn,
    .control-btn,
    .experiment-button,
    .beaker,
    .electrode,
    .half-cell,
    .flame,
    .molecule,
    .monomer,
    .droplet,
    .particle,
    .floating-molecule {
        will-change: auto;
        animation: none !important;
        transition: none !important;
    }
}

/* High refresh rate optimizations */
@media (min-resolution: 120dpi) {
    .experiment-card,
    .experiment-btn,
    .experiment-button {
        transition-duration: 0.2s;
    }
    
    .flame {
        animation-duration: 0.4s;
    }
    
    .particle {
        animation-duration: 2s;
    }
}

/* Dark theme enhancements */
@media (prefers-color-scheme: dark) {
    .experiment-workspace {
        background: rgba(0, 0, 0, 0.4);
    }
    
    .data-point {
        background: rgba(0, 0, 0, 0.4);
    }
    
    .control-group input[type="range"] {
        background: rgba(255, 255, 255, 0.2);
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .experiment-card,
    .experiment-btn,
    .control-btn,
    .experiment-button {
        transition: none;
    }
    
    .lab-equipment-icons .equipment,
    .flame,
    .progress-fill::after,
    .safety-icon {
        animation: none;
    }
    
    .experiments-intro::before {
        animation: none;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .experiment-card {
        border: 2px solid var(--text-primary);
    }
    
    .experiment-btn,
    .experiment-button {
        border: 2px solid var(--text-primary);
    }
    
    .data-point {
        border: 1px solid var(--text-primary);
    }
}

/* Enhanced spectrum and analysis animations */
@keyframes spectrum-pulse {
    0%, 100% { 
        opacity: 0.7;
        transform: scaleY(1);
    }
    50% { 
        opacity: 1;
        transform: scaleY(1.2);
    }
}

/* Advanced polymer bond formation */
@keyframes polymer-chain-growth {
    0% { 
        width: 0;
        opacity: 0;
        filter: blur(2px);
    }
    20% {
        opacity: 0.6;
        filter: blur(1px);
    }
    80% {
        opacity: 0.9;
        filter: blur(0px);
    }
    100% { 
        width: 80%;
        opacity: 1;
        filter: blur(0px);
    }
}

.polymer-chain.animating {
    animation: polymer-chain-growth 5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Enhanced chromatography spot visualization */
.chromatography-paper .spot {
    position: relative;
    overflow: visible;
}

.chromatography-paper .spot::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 50%;
    background: inherit;
    opacity: 0.3;
    filter: blur(2px);
    z-index: -1;
}

/* Measurement line animations */
@keyframes measurement-draw {
    0% { 
        width: 0;
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% { 
        width: 60%;
        opacity: 1;
    }
}

.measurement-line {
    animation: measurement-draw 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Enhanced solvent front movement */
@keyframes solvent-rise {
    0% { 
        height: 0%;
        opacity: 0.3;
    }
    10% {
        opacity: 0.8;
    }
    90% {
        opacity: 0.8;
    }
    100% { 
        height: 85%;
        opacity: 0.6;
    }
}

.solvent-front.animated {
    animation: solvent-rise 10s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Ion flow enhancements */
@keyframes ion-bridge-flow {
    0% { 
        left: 0; 
        opacity: 0;
        transform: scale(0.8);
    }
    20% {
        opacity: 1;
        transform: scale(1);
    }
    80% {
        opacity: 1;
        transform: scale(1);
    }
    100% { 
        left: 100%; 
        opacity: 0;
        transform: scale(0.8);
    }
}

.bridge-ion.enhanced {
    animation: ion-bridge-flow 2.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Advanced equipment status indicators */
@keyframes status-active {
    0%, 100% { 
        opacity: 1;
        transform: scale(1);
    }
    50% { 
        opacity: 0.7;
        transform: scale(1.2);
    }
}

.status-indicator.enhanced-active {
    animation: status-active 1.5s ease-in-out infinite;
}

/* Temperature visualization enhancements */
@keyframes temperature-fluctuation {
    0% { 
        filter: hue-rotate(0deg) brightness(1);
        text-shadow: 0 0 5px currentColor;
    }
    25% {
        filter: hue-rotate(10deg) brightness(1.1);
        text-shadow: 0 0 8px currentColor;
    }
    50% {
        filter: hue-rotate(20deg) brightness(1.2);
        text-shadow: 0 0 12px currentColor;
    }
    75% {
        filter: hue-rotate(10deg) brightness(1.1);
        text-shadow: 0 0 8px currentColor;
    }
    100% { 
        filter: hue-rotate(0deg) brightness(1);
        text-shadow: 0 0 5px currentColor;
    }
}

.temperature-display.active {
    animation: temperature-fluctuation 2s ease-in-out infinite;
}

/* Enhanced mixing swirl animation */
@keyframes enhanced-mixing {
    0% { 
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
        border-color: transparent var(--accent-primary) transparent transparent;
    }
    25% {
        transform: translate(-50%, -50%) rotate(90deg) scale(1.05);
        border-color: transparent var(--science) transparent transparent;
    }
    50% {
        transform: translate(-50%, -50%) rotate(180deg) scale(1.1);
        border-color: transparent var(--humanities) transparent transparent;
    }
    75% {
        transform: translate(-50%, -50%) rotate(270deg) scale(1.05);
        border-color: transparent var(--technology) transparent transparent;
    }
    100% { 
        transform: translate(-50%, -50%) rotate(360deg) scale(1);
        border-color: transparent var(--accent-primary) transparent transparent;
    }
}

.mixing-animation.enhanced {
    animation: enhanced-mixing 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) infinite;
}

/* Data visualization improvements */
.rf-result-row {
    opacity: 0;
    transform: translateX(-20px);
    animation: slide-in-result 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.rf-result-row:nth-child(1) { animation-delay: 0.1s; }
.rf-result-row:nth-child(2) { animation-delay: 0.2s; }
.rf-result-row:nth-child(3) { animation-delay: 0.3s; }

@keyframes slide-in-result {
    0% {
        opacity: 0;
        transform: translateX(-20px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Enhanced particle trail effects */
.animated-particle {
    position: relative;
}

.animated-particle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, currentColor 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0.3;
    z-index: -1;
}

/* Advanced glow effects for active elements */
.equipment-glow {
    position: relative;
}

.equipment-glow::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    background: inherit;
    border-radius: inherit;
    filter: blur(10px);
    opacity: 0.6;
    z-index: -1;
    animation: glow-pulse 2s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
    0% { 
        opacity: 0.3;
        transform: scale(1);
    }
    100% { 
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* Enhanced progress tracking animations */
.progress-tracking {
    position: relative;
    overflow: hidden;
}

.progress-tracking::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(0, 212, 255, 0.2), 
        transparent);
    animation: progress-sweep 3s ease-in-out infinite;
}

@keyframes progress-sweep {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Mobile responsiveness for enhanced animations */
@media (max-width: 768px) {
    .animated-particle {
        width: 2px;
        height: 2px;
    }
    
    .polymer-bond-animation {
        width: 20px;
        height: 2px;
    }
    
    .chromatography-paper .spot {
        width: 6px;
        height: 6px;
    }
}

/* ===== INTERACTIVE CHEMISTRY SANDBOX ===== */

/* Main Sandbox Section */
.chemistry-sandbox {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.03) 0%, 
        rgba(255, 71, 87, 0.03) 50%, 
        rgba(58, 66, 250, 0.03) 100%);
    position: relative;
    overflow: hidden;
}

.chemistry-sandbox::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><pattern id="lab-pattern" x="0" y="0" width="40" height="40" patternUnits="userSpace