* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-dark: #0a0a0a;
    --secondary-dark: #1a1a1a;
    --accent-dark: #2a2a2a;
    --surface-dark: #1e1e1e;
    
    --primary-gold: #d4af37;
    --accent-gold: #f4d03f;
    --deep-gold: #b8860b;
    
    --primary-emerald: #50c878;
    --accent-emerald: #6fd08a;
    --deep-emerald: #3e9c60;
    
    --primary-ruby: #e0115f;
    --accent-ruby: #ff1f5a;
    --deep-ruby: #c20e4f;
    
    --primary-sapphire: #0f52ba;
    --accent-sapphire: #1e6fff;
    --deep-sapphire: #0c4a9f;
    
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    
    --gradient-luxury: linear-gradient(135deg, var(--primary-gold), var(--accent-gold), var(--primary-emerald));
    --gradient-dark: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
    --gradient-surface: linear-gradient(135deg, var(--surface-dark), var(--accent-dark));
    
    --shadow-luxury: 0 20px 40px rgba(212, 175, 55, 0.3);
    --shadow-dark: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-surface: 0 5px 15px rgba(0, 0, 0, 0.3);
    
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.5s ease;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--primary-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

.game-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* Background Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.floating-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(2px 2px at 20px 30px, rgba(212, 175, 55, 0.3), transparent),
                radial-gradient(2px 2px at 40px 70px, rgba(80, 200, 120, 0.3), transparent),
                radial-gradient(1px 1px at 90px 40px, rgba(224, 17, 95, 0.3), transparent),
                radial-gradient(1px 1px at 130px 80px, rgba(15, 82, 186, 0.3), transparent);
    background-size: 200px 200px;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-200px); }
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    animation: drift 15s infinite ease-in-out;
}

.orb-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
    top: 10%;
    left: 20%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(80, 200, 120, 0.1) 0%, transparent 70%);
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(224, 17, 95, 0.1) 0%, transparent 70%);
    bottom: 20%;
    left: 40%;
    animation-delay: -10s;
}

@keyframes drift {
    0%, 100% { transform: translateY(0px) translateX(0px); }
    25% { transform: translateY(-20px) translateX(20px); }
    50% { transform: translateY(-40px) translateX(-10px); }
    75% { transform: translateY(-20px) translateX(-20px); }
}

/* Header */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem 2rem;
    background: var(--gradient-surface);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo i {
    font-size: 2rem;
    background: var(--gradient-luxury);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo h1 {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    background: var(--gradient-luxury);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-with-image {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: -24px;
}

.logo-m-letter {
  height: 8rem;
  display: inline-block;
  vertical-align: middle;
  margin-right: -24px;
  transform: translateY(-10px);
}

.difficulty-selector {
    display: flex;
    gap: 0.5rem;
    background: var(--secondary-dark);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.difficulty-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    border-radius: calc(var(--border-radius) - 2px);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.difficulty-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-luxury);
    opacity: 0;
    transition: var(--transition);
}

.difficulty-btn:hover::before,
.difficulty-btn.active::before {
    opacity: 0.1;
}

.difficulty-btn:hover,
.difficulty-btn.active {
    color: var(--text-primary);
    transform: translateY(-2px);
}

.difficulty-btn.active {
    background: var(--gradient-luxury);
    box-shadow: var(--shadow-luxury);
    color: var(--primary-dark);
}

.difficulty-btn.active::before {
    opacity: 0;
}

.difficulty-btn i {
    font-size: 1.2rem;
}

.difficulty-btn span {
    font-weight: 600;
    font-size: 0.9rem;
}

.difficulty-btn small {
    font-size: 0.7rem;
    opacity: 0.8;
}

/* Game Stats */
.game-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--gradient-surface);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-luxury);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover::before {
    opacity: 0.05;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-surface);
}

.stat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--gradient-luxury);
    border-radius: var(--border-radius);
    color: var(--primary-dark);
    font-size: 1.5rem;
    position: relative;
    z-index: 1;
}

.stat-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    position: relative;
    z-index: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: 'Orbitron', monospace;
    color: var(--text-primary);
}

/* Game Board */
.game-board-container {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.game-board {
    display: grid;
    gap: 1rem;
    padding: 2rem;
    background: var(--gradient-surface);
    border-radius: var(--border-radius-large);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-surface);
}

.game-board.easy {
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 1fr;
    max-width: 500px;
}

.game-board.medium {
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: 1fr;
    max-width: 700px;
}

.game-board.hard {
    grid-template-columns: repeat(8, 1fr);
    grid-auto-rows: 1fr;
    max-width: 900px;
}

.card {
    aspect-ratio: 1;
    border-radius: var(--border-radius);
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    transform-style: preserve-3d;
    perspective: 1000px;
    min-height: 80px;
}

.game-board {
    position: relative;
}
.card {
    flex: 1 0 auto;
}

.card.flipped {
    transform: translateY(-80px);
    z-index: 10;
}

.card.flipped .card-inner {
    transform: translateY(-80px); 
    transform: rotateY(180deg);
}

.card-inner {
    width: 100%;
    height: 100%;
    position: absolute;
    transform-style: preserve-3d;
    transition: transform 0.6s;
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius);
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.card.matched {
    position: absolute;
    opacity: 0.6;
    transform: scale(0.9);
    pointer-events: none;
}

.card.hint {
    animation: hint-glow 1s ease-in-out;
}

@keyframes hint-glow {
    0%, 100% { box-shadow: 0 0 0 rgba(212, 175, 55, 0.5); }
    50% { box-shadow: 0 0 20px rgba(212, 175, 55, 0.8); }
}

.card-back {
    background: var(--gradient-dark);
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.card-back::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-luxury);
    opacity: 0.1;
    transition: var(--transition);
}

.card:hover .card-back::before {
    opacity: 0.2;
}

.card-back i {
    font-size: 2.5rem;
    opacity: 0.3;
}

.card-front {
    background: var(--gradient-surface);
    transform: rotateY(180deg);
    color: var(--text-primary);
    border-color: var(--primary-gold);
}

.card-front i {
    font-size: 2.5rem;
    color: var(--primary-gold);
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.5);
}

/* Controls */
.game-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-luxury);
    opacity: 0;
    transition: var(--transition);
}

.control-btn:hover::before {
    opacity: 0.1;
}

.control-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-surface);
}

.control-btn:active {
    transform: translateY(0);
}

.control-btn i {
    font-size: 1.2rem;
}

.hint-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--primary-ruby);
    color: white;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 50px;
    font-weight: 700;
}

/* Progress Bar */
.progress-bar-container {
    position: relative;
    width: 100%;
    height: 8px;
    background: var(--secondary-dark);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-luxury);
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    display: block;
    text-align: center;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--gradient-surface);
    border-radius: var(--border-radius-large);
    padding: 3rem;
    max-width: 500px;
    width: 90%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    transform: scale(0.8) translateY(50px);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-content {
    text-align: center;
}

.victory-animation {
    position: relative;
    margin-bottom: 2rem;
}

.victory-animation i {
    font-size: 4rem;
    color: var(--primary-gold);
    animation: trophy-bounce 2s infinite;
}

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

.confetti {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 200px;
    background: 
        radial-gradient(circle at 20% 20%, var(--primary-gold) 2px, transparent 2px),
        radial-gradient(circle at 80% 80%, var(--primary-emerald) 2px, transparent 2px),
        radial-gradient(circle at 40% 40%, var(--primary-ruby) 2px, transparent 2px);
    background-size: 20px 20px;
    animation: confetti-fall 3s infinite ease-in-out;
}

@keyframes confetti-fall {
    0% { transform: translateX(-50%) translateY(-100px) rotate(0deg); opacity: 1; }
    100% { transform: translateX(-50%) translateY(100px) rotate(360deg); opacity: 0; }
}

.pause-icon {
    margin-bottom: 2rem;
}

.pause-icon i {
    font-size: 4rem;
    color: var(--text-secondary);
}

.modal h2 {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-luxury);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.final-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.final-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--secondary-dark);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.final-stat i {
    color: var(--primary-gold);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.modal-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-luxury);
    border: none;
    border-radius: var(--border-radius);
    color: var(--primary-dark);
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.modal-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-luxury);
}

.modal-btn.close-btn {
    background: var(--secondary-dark);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .game-container {
        padding: 1rem;
    }
    
    .game-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .difficulty-selector {
        width: 100%;
        justify-content: center;
    }
    
    .game-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .game-board {
        padding: 1rem;
        gap: 0.5rem;
    }
    
    .card {
        min-height: 60px;
    }
    
    .card-face {
        font-size: 1.5rem;
    }
    
    .card-front i,
    .card-back i {
        font-size: 1.8rem;
    }
    
    .game-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .control-btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .modal {
        padding: 2rem;
        margin: 1rem;
    }
    
    .modal h2 {
        font-size: 2rem;
    }
    
    .final-stats {
        grid-template-columns: 1fr;
    }
    
    .modal-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .game-board.easy {
        max-width: 320px;
    }
    
    .game-board.medium {
        max-width: 350px;
    }
    
    .game-board.hard {
        max-width: 380px;
    }
    
    .card {
        min-height: 50px;
    }
    
    .stat-value {
        font-size: 1.4rem;
    }
    
    .control-btn {
        padding: 0.7rem 1rem;
        font-size: 0.8rem;
    }
}

.developer-credit {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 18px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 0.8rem;
    font-family: 'Poppins', sans-serif;
    color: #e0e0e0;
    opacity: 0.75;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    z-index: 100;
    transition: all 0.3s ease;
    letter-spacing: 0.4px;
}

.developer-credit:hover {
    opacity: 1;
    transform: translateY(-2px) scale(1.015);
    box-shadow: 0 6px 18px rgba(255, 193, 111, 0.35);
}

.explorer-signature {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-weight: 500;
    font-size: 0.8rem;
    color: #f3f3f3;
    letter-spacing: 0.5px;
}

.eccentric {
    font-weight: 700;
    font-family: 'Georgia', 'Times New Roman', serif;
    background: linear-gradient(90deg, #fcb045, #fd1d1d, #833ab4);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    background-size: 200% auto;
    animation: shimmerText 4s ease infinite;
}