/* Custom Fonts */
.font-orbitron {
    font-family: 'Orbitron', sans-serif;
}

.font-exo {
    font-family: 'Exo 2', sans-serif;
}

/* Neon Effects */
.neon-text {
    text-shadow: 0 0 5px rgba(66, 220, 255, 0.8), 0 0 10px rgba(66, 220, 255, 0.5);
}

.neon-purple {
    text-shadow: 0 0 5px rgba(149, 76, 233, 0.8), 0 0 10px rgba(149, 76, 233, 0.5);
}

.neon-box {
    box-shadow: 0 0 5px rgba(66, 220, 255, 0.5), 0 0 15px rgba(66, 220, 255, 0.3);
}

/* Futuristic UI Elements */
.neural-bg {
    background: linear-gradient(135deg, #0f1322 0%, #1a1a2e 100%);
    background-size: 400% 400%;
    animation: neural-pulse 15s ease infinite;
}

.cyber-grid {
    background-image: 
        linear-gradient(rgba(26, 32, 44, 0.8) 1px, transparent 1px),
        linear-gradient(90deg, rgba(26, 32, 44, 0.8) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Animations */
@keyframes neural-pulse {
    0% { background-position: 0% 50% }
    50% { background-position: 100% 50% }
    100% { background-position: 0% 50% }
}

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

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

/* Glitch Effect */
.glitch {
    position: relative;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    left: 2px;
    text-shadow: -1px 0 #00ffea;
    animation: glitch-animation 3s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: 1px 0 #ff00c1;
    animation: glitch-animation 2s infinite linear alternate-reverse;
}

@keyframes glitch-animation {
    0% {
        clip-path: inset(71% 0 10% 0);
    }
    20% {
        clip-path: inset(29% 0 42% 0);
    }
    40% {
        clip-path: inset(94% 0 2% 0);
    }
    60% {
        clip-path: inset(58% 0 30% 0);
    }
    80% {
        clip-path: inset(14% 0 31% 0);
    }
    100% {
        clip-path: inset(53% 0 21% 0);
    }
}

/* Progress Bar */
.progress-bar {
    height: 4px;
    background: linear-gradient(to right, #3490dc, #6574cd);
    transition: width 0.3s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #1a1a2e;
}

::-webkit-scrollbar-thumb {
    background: #3490dc;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #6574cd;
}

/* HUD Elements */
.hud-element {
    backdrop-filter: blur(4px);
    background-color: rgba(13, 17, 23, 0.7);
    border: 1px solid rgba(66, 153, 225, 0.3);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(66, 153, 225, 0.2);
}

/* Button Styles */
.cyber-button {
    position: relative;
    background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
    color: #fff;
    font-family: 'Exo 2', sans-serif;
    border: none;
    border-radius: 4px;
    padding: 10px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
}

.cyber-button::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: all 0.6s ease;
}

.cyber-button:hover::before {
    left: 100%;
}

.cyber-button:hover {
    box-shadow: 0 0 10px rgba(66, 153, 225, 0.5);
    transform: translateY(-2px);
}

/* Card Styles */
.neural-card {
    background: rgba(15, 23, 42, 0.7);
    border-radius: 12px;
    border-top: 1px solid rgba(66, 153, 225, 0.3);
    border-left: 1px solid rgba(66, 153, 225, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.neural-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(66, 153, 225, 0.3);
}

/* Utility Classes */
.clip-path-hex {
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}

/* Avatar Frames */
.avatar-frame {
    border: 2px solid transparent;
    background: linear-gradient(145deg, #3490dc, #6574cd) border-box;
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    position: relative;
}

.avatar-frame.selected {
    box-shadow: 0 0 15px currentColor;
    transform: scale(1.05);
}

.avatar-frame.selected::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    border: 2px solid currentColor;
    animation: pulse 2s infinite;
}

.avatar-frame.blue-selected {
    color: rgba(66, 153, 225, 0.8);
}

.avatar-frame.green-selected {
    color: rgba(72, 187, 120, 0.8);
}

.avatar-frame.red-selected {
    color: rgba(245, 101, 101, 0.8);
}

.avatar-frame.purple-selected {
    color: rgba(159, 122, 234, 0.8);
}

/* Loading Animation */
.loading-dots::after {
    content: '';
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
    100% { content: ''; }
} 

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #2d3748;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: #718096;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #3182ce;
}

input:checked + .slider:before {
    transform: translateX(26px);
    background-color: white;
}

/* Animations for quiz elements */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.scale-in {
    animation: scaleIn 0.5s ease forwards;
}

.slide-in {
    animation: slideIn 0.5s ease forwards;
}

/* Pulse animation for active elements */
.pulse {
    animation: pulse 2s infinite;
}

/* Notification badge */
.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    padding: 3px 6px;
    border-radius: 50%;
    background: linear-gradient(to right, #f56565, #ed8936);
    color: white;
    font-size: 10px;
    font-weight: bold;
}

/* Tooltip */
.tooltip {
    position: relative;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 120px;
    background-color: rgba(26, 32, 44, 0.95);
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity 0.3s;
    border: 1px solid rgba(66, 153, 225, 0.3);
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* Keyboard shortcut indicator */
.key-indicator {
    display: inline-block;
    padding: 2px 6px;
    background-color: rgba(26, 32, 44, 0.8);
    border: 1px solid rgba(66, 153, 225, 0.3);
    border-radius: 4px;
    font-size: 10px;
    color: #cbd5e0;
}

/* Multiplayer UI elements */
.player-indicator {
    position: relative;
    padding-left: 12px;
}

.player-indicator::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #48bb78;
    animation: pulse 2s infinite;
}

.player-indicator.offline::before {
    background-color: #718096;
    animation: none;
}

/* Challenge Mode Specific Styles */
.memory-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.memory-cell {
    aspect-ratio: 1/1;
    border-radius: 8px;
    background-color: rgba(26, 32, 44, 0.8);
    border: 1px solid rgba(66, 153, 225, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
}

.memory-cell.active {
    background-color: rgba(66, 153, 225, 0.8);
    box-shadow: 0 0 15px rgba(66, 153, 225, 0.5);
}

.memory-cell.correct {
    background-color: rgba(72, 187, 120, 0.8);
    box-shadow: 0 0 15px rgba(72, 187, 120, 0.5);
}

.memory-cell.wrong {
    background-color: rgba(245, 101, 101, 0.8);
    box-shadow: 0 0 15px rgba(245, 101, 101, 0.5);
}

/* Logic Circuit UI */
.logic-node {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: rgba(26, 32, 44, 0.8);
    border: 2px solid rgba(66, 153, 225, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    position: relative;
    z-index: 2;
    color: white;
    transition: all 0.3s ease;
}

.logic-node.border-dashed {
    border-style: dashed;
}

.logic-node.border-green-500 {
    border-color: rgb(34, 197, 94);
    border-width: 3px;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.5);
}

.logic-node.border-red-500 {
    border-color: rgb(239, 68, 68);
    border-width: 3px;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.operator-btn {
    font-family: 'Orbitron', sans-serif;
    font-weight: bold;
    color: white;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.operator-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(66, 153, 225, 0.3);
}

.operator-btn.bg-blue-600 {
    background-color: rgb(37, 99, 235);
    border-color: rgb(96, 165, 250);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.5);
}

.logic-edge {
    height: 2px;
    background: linear-gradient(to right, rgba(66, 153, 225, 0.8), rgba(149, 76, 233, 0.8));
    position: absolute;
    transform-origin: left center;
    z-index: 1;
}

/* Speed Challenge UI */
.target {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(66, 153, 225, 0.8) 0%, rgba(66, 153, 225, 0.2) 70%);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.1s ease;
}

.target:hover {
    transform: scale(1.1);
}

.target.hit {
    animation: targetHit 0.5s forwards;
}

@keyframes targetHit {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* Mobile Optimizations */
@media (max-width: 640px) {
    .font-orbitron {
        letter-spacing: 1px;
    }
    
    .neural-card {
        padding: 12px;
    }
    
    .cyber-button {
        padding: 8px 16px;
        font-size: 14px;
    }
    
    .memory-grid {
        gap: 5px;
    }
} 

/* Input animations */
@keyframes input-pulse {
    0% { box-shadow: 0 0 0 0 rgba(66, 153, 225, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(66, 153, 225, 0); }
    100% { box-shadow: 0 0 0 0 rgba(66, 153, 225, 0); }
}

input.pulse {
    animation: input-pulse 1s ease-out;
} 

#circuit-area {
    position: relative;
    background-image: 
        radial-gradient(circle at 10% 10%, rgba(66, 153, 225, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 90% 90%, rgba(72, 187, 120, 0.05) 0%, transparent 50%);
    overflow: hidden;
}

#circuit-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(26, 32, 44, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(26, 32, 44, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
    z-index: 0;
} 

/* New Animations and Effects */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes pulse-highlight {
    0%, 100% { box-shadow: 0 0 0 0 rgba(72, 187, 120, 0.7); }
    50% { box-shadow: 0 0 0 10px rgba(72, 187, 120, 0); }
}

.pulse-highlight {
    animation: pulse-highlight 1s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    border-color: #48bb78 !important;
}

.shadow-glow {
    box-shadow: 0 0 15px rgba(66, 153, 225, 0.4);
}

.shadow-glow:hover {
    box-shadow: 0 0 20px rgba(66, 153, 225, 0.6);
}

/* Improved answer options */
.answer-option {
    position: relative;
    overflow: hidden;
}

.answer-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(66, 153, 225, 0.1), transparent);
    transition: all 0.6s ease;
}

.answer-option:hover::before {
    left: 100%;
}

/* Timer pulse animation */
@keyframes timer-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

#timer.pulse {
    animation: timer-pulse 0.5s ease-in-out infinite;
} 

/* Memory Matrix styles */
.memory-grid {
    display: grid;
    gap: 8px;
    margin: 0 auto;
    max-width: 400px;
}

.memory-cell {
    aspect-ratio: 1;
    background: rgba(30, 41, 59, 0.8);
    border: 2px solid rgba(148, 163, 184, 0.2);
    border-radius: 8px;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.memory-cell:hover {
    border-color: rgba(148, 163, 184, 0.5);
    transform: scale(1.05);
}

.memory-cell.active {
    background: linear-gradient(135deg, #8b5cf6, #d946ef);
    border-color: #a855f7;
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.5);
}

.memory-cell.correct {
    background: linear-gradient(135deg, #10b981, #34d399);
    border-color: #10b981;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
}

.memory-cell.correct-pick {
    background: linear-gradient(135deg, #8b5cf6, #d946ef);
    border-color: #10b981;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
}

.memory-cell.wrong {
    background: linear-gradient(135deg, #ef4444, #f87171);
    border-color: #ef4444;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.5);
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

/* Memory container */
.memory-container {
    position: relative;
    padding: 1rem;
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.3);
    border: 1px dashed rgba(148, 163, 184, 0.3);
}

.memory-difficulty-indicator {
    box-shadow: 0 0 10px rgba(126, 34, 206, 0.5);
    z-index: 1;
}

.memory-status-indicator {
    position: relative;
}

/* Memory progress bar animation */
#memory-progress-bar {
    transition: width 0.3s ease;
    background: linear-gradient(90deg, #8b5cf6, #d946ef);
    border-radius: 999px;
    box-shadow: 0 0 5px rgba(139, 92, 246, 0.5);
}

/* Memory cell animations */
@keyframes cell-reveal {
    0% { transform: scale(0.5); opacity: 0; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

.memory-cell.scale-in {
    animation: cell-reveal 0.3s ease forwards;
} 

/* Results Screen Styles */
.result-card {
    transform: translateY(20px);
    opacity: 0;
    animation: slide-up 0.8s ease forwards;
}

@keyframes slide-up {
    0% { transform: translateY(20px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

.performance-badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    border-radius: 999px;
    background: rgba(30, 41, 59, 0.7);
    box-shadow: 0 0 10px currentColor;
    opacity: 0;
    transform: scale(0.8);
    animation: badge-appear 1s ease forwards 0.5s;
}

@keyframes badge-appear {
    0% { transform: scale(0.8); opacity: 0; }
    70% { transform: scale(1.1); opacity: 0.9; }
    100% { transform: scale(1); opacity: 1; }
}

.score-container {
    position: relative;
}

.score-circle {
    transform: scale(0.8);
    opacity: 0;
    animation: score-appear 1s ease forwards 0.3s;
}

@keyframes score-appear {
    0% { transform: scale(0.8); opacity: 0; }
    60% { transform: scale(1.1); opacity: 0.9; }
    100% { transform: scale(1); opacity: 1; }
}

.score-glow {
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.6);
    animation: pulse-glow 2s infinite;
}

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

.stat-item {
    opacity: 0;
    transform: translateY(10px);
}

.stat-item.fade-in {
    animation: stat-fade-in 0.5s ease forwards;
}

@keyframes stat-fade-in {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 1; transform: translateY(0); }
}

.stat-bar div div {
    transition: width 1s ease-out;
}

.streak-container {
    position: relative;
    overflow: hidden;
    animation: streak-glow 3s infinite;
}

@keyframes streak-glow {
    0%, 100% { box-shadow: 0 0 5px rgba(234, 179, 8, 0.5); }
    50% { box-shadow: 0 0 15px rgba(234, 179, 8, 0.8); }
}

.streak-value {
    animation: pulse-text 2s infinite;
}

@keyframes pulse-text {
    0%, 100% { text-shadow: 0 0 5px rgba(234, 179, 8, 0.7); }
    50% { text-shadow: 0 0 15px rgba(234, 179, 8, 1); }
}

.action-buttons {
    opacity: 0;
    animation: fade-in 0.5s ease forwards 1.5s;
} 

/* Home Screen Styles */
.user-profile-container {
    animation: slide-in 0.5s ease-out;
}

.level-indicator {
    position: relative;
    padding-left: 2px;
    padding-right: 2px;
}

.level-indicator::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.7), transparent);
}

.streak-card {
    animation: fade-in 0.5s ease-out;
}

.streak-day {
    position: relative;
    transition: all 0.3s ease;
}

.streak-day.active.pop-in {
    animation: pop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.streak-day.active::after {
    content: '';
    position: absolute;
    top: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #3b82f6;
}

.daily-challenge-card {
    animation: slide-in 0.5s ease-out 0.2s both;
    position: relative;
    overflow: hidden;
}

.daily-challenge-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(250, 204, 21, 0.1) 0%, transparent 70%);
    animation: rotate 10s linear infinite;
    z-index: -1;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.pulse-animation {
    animation: pulse 2s infinite;
}

.challenge-card {
    position: relative;
    overflow: hidden;
}

.challenge-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: all 0.6s ease;
}

.challenge-card:hover::after {
    left: 100%;
}

.challenge-icon {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.challenge-card:hover .challenge-icon {
    transform: scale(1.1);
}

.achievement-item {
    transition: all 0.3s ease;
}

.achievement-item.unlocked:hover {
    transform: translateY(-5px);
}

.achievement-item.locked {
    opacity: 0.6;
}

.achievement-item.fade-in {
    animation: fade-in 0.5s ease forwards;
}

.achievement-icon {
    position: relative;
    transition: all 0.3s ease;
}

.achievement-item.unlocked .achievement-icon::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #10b981;
    border: 2px solid #0f172a;
}

.empty-state {
    opacity: 0;
    animation: fade-in 0.5s ease-out 0.8s forwards;
}

.activity-list {
    position: relative;
}

.activity-item {
    position: relative;
    transition: all 0.3s ease;
}

.activity-item:hover {
    background-color: rgba(30, 41, 59, 0.5);
    transform: translateX(5px);
} 

/* Fix scrolling issues */
body {
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    -webkit-tap-highlight-color: rgba(0,0,0,0); /* Remove tap highlight on mobile */
    touch-action: manipulation; /* Improve touch response */
}

#app {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

#main-container {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
}

.neural-bg {
    height: 100%;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #3490dc #1a1a2e;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

main {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 4rem;
}

/* Improve card responsiveness */
.neural-card {
    max-width: 100%;
    overflow: hidden;
}

/* Make quiz content responsive */
.quiz-content {
    max-height: calc(100vh - 140px);
    overflow-y: auto;
}

/* Ensure memory grid fits on screen */
.memory-grid {
    max-width: 100%;
    max-height: 60vh;
}

.memory-cell {
    min-width: 30px;
    min-height: 30px;
}

/* Mobile-specific touch improvements */
@media (hover: none) {
    /* Replace hover effects with active state for touch devices */
    .cyber-button:active::before {
        left: 100%;
    }
    
    .challenge-card:active::after {
        left: 100%;
    }
    
    .answer-option:active::before {
        left: 100%;
    }
    
    /* Make buttons larger for touch targets */
    .cyber-button {
        padding: 12px 24px;
        min-height: 44px; /* Minimum recommended touch target size */
    }
    
    /* Increase touch target size for interactive elements */
    .memory-cell {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Remove hover-specific animations */
    .neural-card:hover {
        transform: none;
    }
}

/* Improve mobile responsiveness */
@media (max-width: 640px) {
    .memory-grid {
        gap: 4px;
    }
    
    .memory-cell {
        min-width: 20px;
        min-height: 20px;
    }
    
    .grid {
        grid-gap: 0.5rem !important;
    }
    
    .neural-card {
        padding: 0.75rem !important;
    }
    
    .h-32 {
        height: 5rem !important;
    }
    
    .w-32 {
        width: 5rem !important;
    }
    
    .text-4xl {
        font-size: 1.5rem !important;
    }
    
    .text-3xl {
        font-size: 1.25rem !important;
    }
    
    .text-2xl {
        font-size: 1.125rem !important;
    }
    
    .text-xl {
        font-size: 1rem !important;
    }
    
    .p-8 {
        padding: 1.5rem !important;
    }
    
    .p-6 {
        padding: 1rem !important;
    }
    
    .p-4 {
        padding: 0.75rem !important;
    }
    
    /* Increase font sizes for better readability on small screens */
    body {
        font-size: 16px !important;
    }
    
    /* Improve touch targets */
    .answer-option {
        padding: 0.875rem !important;
        margin-bottom: 0.5rem !important;
    }
    
    /* Make buttons easier to tap */
    button, .cyber-button, .answer-option {
        min-height: 44px;
    }
    
    /* Fix keyboard shortcut indicators - hide on mobile */
    .answer-option .text-xs {
        display: none;
    }
    
    /* Adjust avatar sizes for mobile */
    .avatar-frame {
        height: 3rem !important;
        width: 3rem !important;
    }
}

/* Ensure results screen fits */
.result-card {
    max-height: 80vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

/* Fix for daily challenge and streak cards */
.daily-challenge-card, .streak-card {
    max-width: 100%;
} 

/* Fix for home screen scrolling */
.home-screen-container {
    height: 100%;
    width: 100%;
    overflow-y: auto;
    padding-bottom: 2rem;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

/* Fix for mobile overflow issues */
@media (max-width: 640px) {
    .daily-challenge-card, .streak-card, .neural-card {
        padding: 0.75rem !important;
        margin-bottom: 0.75rem;
    }
    
    .space-y-8 > :not([hidden]) ~ :not([hidden]) {
        margin-top: 1rem !important;
    }
    
    .space-y-6 > :not([hidden]) ~ :not([hidden]) {
        margin-top: 0.75rem !important;
    }
    
    .space-y-4 > :not([hidden]) ~ :not([hidden]) {
        margin-top: 0.5rem !important;
    }
    
    .mb-8 {
        margin-bottom: 1rem !important;
    }
    
    .mb-6 {
        margin-bottom: 0.75rem !important;
    }
    
    .mb-4 {
        margin-bottom: 0.5rem !important;
    }
    
    h2, h3 {
        font-size: 1rem !important;
    }
    
    p {
        font-size: 0.875rem !important;
    }
    
    .cyber-button {
        padding: 0.5rem 0.75rem !important;
        font-size: 0.875rem !important;
    }
    
    /* Increase contrast for better readability */
    .text-gray-400 {
        color: rgba(203, 213, 225, 0.9) !important;
    }
    
    /* Make statistics more readable */
    .stat-value {
        font-size: 1.25rem !important;
    }
}

/* Ensure content fits on smaller screens */
@media (max-height: 700px) {
    .memory-grid {
        max-height: 50vh;
    }
    
    .quiz-content {
        max-height: calc(100vh - 120px);
    }
    
    .result-card {
        max-height: 70vh;
    }
}

/* Portrait phone specific adjustments */
@media (max-width: 480px) {
    .grid-cols-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    }
    
    .streak-day {
        transform: scale(0.8);
    }
    
    /* Stack buttons on very small screens */
    .action-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    /* Make sure modal dialogs fit */
    .neural-card.p-8 {
        padding: 1rem !important;
    }
}

/* Fix for iPhone notch/dynamic island */
@supports (padding: max(0px)) {
    .neural-bg, header {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    header {
        padding-top: max(0.75rem, env(safe-area-inset-top));
    }
    
    .home-screen-container {
        padding-bottom: max(2rem, env(safe-area-inset-bottom));
    }
}