/* ===== RESET & VARIABLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a35;
    --card-bg: linear-gradient(145deg, #2a2a50, #1e1e40);
    --accent-hot: #ff3366;
    --accent-cool: #00d4ff;
    --accent-gold: #ffd700;
    --accent-purple: #a855f7;
    --text-white: #ffffff;
    --text-gray: #94a3b8;
    --glow-hot: 0 0 20px rgba(255, 51, 102, 0.5);
    --glow-cool: 0 0 20px rgba(0, 212, 255, 0.5);
    --glow-gold: 0 0 20px rgba(255, 215, 0, 0.5);
}

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

/* ===== ANIMATED BACKGROUND ===== */
.background-effects {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(255, 51, 102, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(168, 85, 247, 0.1) 0%, transparent 60%),
        var(--bg-primary);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: pulse 6s ease-in-out infinite alternate;
}

.glow-1 {
    width: 300px;
    height: 300px;
    background: var(--accent-hot);
    top: -100px;
    left: -100px;
    opacity: 0.3;
}

.glow-2 {
    width: 250px;
    height: 250px;
    background: var(--accent-cool);
    bottom: -80px;
    right: -80px;
    opacity: 0.3;
    animation-delay: 2s;
}

.glow-3 {
    width: 200px;
    height: 200px;
    background: var(--accent-purple);
    top: 40%;
    left: 60%;
    opacity: 0.2;
    animation-delay: 4s;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.2;
    }

    100% {
        transform: scale(1.2);
        opacity: 0.4;
    }
}

/* ===== GAME CONTAINER ===== */
.game-container {
    width: 95%;
    max-width: 600px;
    padding: 15px;
}

/* ===== HEADER ===== */
.header {
    text-align: center;
    margin-bottom: 20px;
}

.logo {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-white);
    text-shadow:
        0 0 10px var(--accent-cool),
        0 0 30px rgba(0, 212, 255, 0.4);
    animation: logoGlow 3s ease-in-out infinite alternate;
}

.logo .accent {
    background: linear-gradient(135deg, var(--accent-hot), var(--accent-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 15px rgba(255, 51, 102, 0.6));
}

@keyframes logoGlow {
    0% {
        text-shadow: 0 0 10px var(--accent-cool), 0 0 30px rgba(0, 212, 255, 0.4);
    }

    100% {
        text-shadow: 0 0 20px var(--accent-cool), 0 0 50px rgba(0, 212, 255, 0.6);
    }
}

/* ===== STATS BAR ===== */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.stat {
    background: linear-gradient(145deg, rgba(42, 42, 80, 0.9), rgba(30, 30, 64, 0.9));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    font-size: 1.2rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.65rem;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-white);
}

.stat.highlight {
    border-color: var(--accent-gold);
    box-shadow: var(--glow-gold), 0 4px 15px rgba(0, 0, 0, 0.3);
}

.restart-btn {
    background: linear-gradient(135deg, var(--accent-hot), #ff6699);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--glow-hot);
    transition: transform 0.2s, box-shadow 0.2s;
}

.restart-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(255, 51, 102, 0.7);
}

/* ===== GAME BOARD ===== */
.game-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    perspective: 1000px;
}

/* ===== CARDS ===== */
.card {
    aspect-ratio: 1 / 1;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
    animation: cardDrop 0.4s ease-out backwards;
    will-change: transform;
}

@keyframes cardDrop {
    from {
        opacity: 0;
        transform: translateY(-30px) rotateX(20deg);
    }

    to {
        opacity: 1;
        transform: translateY(0) rotateX(0);
    }
}

.card:hover:not(.flipped):not(.matched) {
    transform: translateY(-4px);
}

.card.flipped {
    transform: rotateY(180deg);
}

.card.matched {
    animation: matchSuccess 0.5s ease;
}

@keyframes matchSuccess {

    0%,
    100% {
        transform: rotateY(180deg) scale(1);
    }

    50% {
        transform: rotateY(180deg) scale(1.1);
    }
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    will-change: transform;
}

/* CARD BACK - THE HIDDEN SIDE */
.card-back {
    background: var(--card-bg);
    border: 2px solid rgba(0, 212, 255, 0.3);
    font-size: 1.8rem;
    color: var(--accent-cool);
    box-shadow:
        0 5px 20px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    z-index: 2;
}

.card:hover:not(.flipped) .card-back {
    border-color: var(--accent-cool);
    box-shadow:
        var(--glow-cool),
        0 5px 20px rgba(0, 0, 0, 0.4);
}

/* CARD FRONT - THE WORD SIDE */
.card-front {
    background: linear-gradient(145deg, #3d3d70, #2a2a50);
    border: 2px solid var(--accent-cool);
    transform: rotateY(180deg);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 8px;
    text-align: center;
    color: var(--text-white);
    box-shadow:
        var(--glow-cool),
        0 5px 20px rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.card.matched .card-front {
    border-color: var(--accent-gold);
    background: linear-gradient(145deg, #4a4a30, #3a3a20);
    box-shadow:
        var(--glow-gold),
        0 5px 20px rgba(0, 0, 0, 0.4);
}

/* ===== SHAKE ===== */
.shake {
    animation: shake 0.4s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: rotateY(180deg) translateX(0);
    }

    25% {
        transform: rotateY(180deg) translateX(-6px);
    }

    75% {
        transform: rotateY(180deg) translateX(6px);
    }
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 35, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal {
    background: linear-gradient(145deg, #2a2a50, #1e1e40);
    padding: 40px 50px;
    border-radius: 20px;
    text-align: center;
    border: 2px solid var(--accent-gold);
    box-shadow: var(--glow-gold);
    transform: scale(1);
    transition: transform 0.3s ease;
}

.modal-overlay.hidden .modal {
    transform: scale(0.8);
}

.modal-emoji {
    font-size: 3.5rem;
    margin-bottom: 10px;
    animation: bounce 0.8s ease infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.modal h2 {
    font-size: 2rem;
    color: var(--accent-gold);
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.modal-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 25px;
}

.modal-stat {
    display: flex;
    flex-direction: column;
}

.modal-stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-cool);
}

.modal-stat-label {
    font-size: 0.8rem;
    color: var(--text-gray);
    text-transform: uppercase;
}

.play-again-btn {
    background: linear-gradient(135deg, var(--accent-hot), #ff6699);
    border: none;
    color: white;
    padding: 12px 40px;
    border-radius: 30px;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--glow-hot);
    transition: transform 0.2s;
}

.play-again-btn:hover {
    transform: scale(1.05);
}

/* ===== CONFETTI ===== */
#confetti-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999;
    overflow: hidden;
}

.confetti {
    position: absolute;
    animation: confettiFall linear forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(-20px) rotate(0deg);
        opacity: 1;
    }

    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ===== COMBO ===== */
.combo-popup {
    position: fixed;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-gold);
    text-shadow: 0 0 15px rgba(255, 215, 0, 0.8);
    pointer-events: none;
    z-index: 100;
    animation: comboFloat 0.8s ease-out forwards;
}

@keyframes comboFloat {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }

    100% {
        opacity: 0;
        transform: translateY(-40px) scale(1.2);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 500px) {
    .game-board {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .logo {
        font-size: 2rem;
    }

    .stat {
        padding: 6px 10px;
    }

    .stat-value {
        font-size: 0.95rem;
    }

    .modal {
        padding: 25px 20px;
        margin: 15px;
    }
}