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

body {
     font-family: Arial, sans-serif;
  min-height: 100vh;

  background-image: linear-gradient(
      rgba(0, 0, 0, 0.7),
      rgba(0, 0, 0, 0.7)
    ),
    url("https://images.unsplash.com/photo-1542751371-adc38448a05e");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

@media (max-width: 768px) {
    body {
        background-attachment: scroll;
    }
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    color: white;
    flex-wrap: wrap;
    min-height: 160px;

    background-image: linear-gradient(
        rgba(0, 0, 0, 0.6),
        rgba(0, 0, 0, 0.6)
      ),
      url("https://images.unsplash.com/photo-1511512578047-dfb367046420");

    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.logo {
    font-size: 1.8rem;
}

.auth-buttons {
    display: flex;
    gap: 12px;
}

.auth-buttons button {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600px;
}

.login {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.signup {
    background: #6366f1;
    color: white;
}

@media (max-width: 600px) {
    .header {
        flex-direction: column;
        gap: 14px;
        text-align: center;
    }
}

.nav {
    display: flex;
    gap: 20px;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    position: relative;
}

.nav a::after {
    content: "";
    position: absolute;
    width: 0;
    height: 2px;
    background: #6366f1;
    bottom: -4px;
    left: 0;
    transition: width 0.3s;
}

.nav a:hover::after {
    width: 100%;
}

.hero {
    text-align: center;
    padding: 100px 20px;
    color: white;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 0 0 20px #6366f1;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.games {
    padding: 40px 20px;
    color: white;
    text-align: center;
}

.game-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    padding: 40px 20px;
}

.game-card {
    position: relative;
    flex: 1 1 220px;
    max-width: 260px;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.game-cards.scrollable .game-card {
    flex: 0 0 260px;
}

.game-card::before {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(
        120deg,
        transparent,
        #6366f1,
        #22d3ee,
        #6366f1,
        transparent
    );
    background-size: 300%;
    animation: neonBorder 3s linear infinite;
    z-index: 0;
}

@keyframes neonBorder {
    0% { background-position: 0%;}
    100% { background-position: 300%;}
}

.game-card::after {
    content: "";
    position: absolute;
    inset: 2px;
    border-radius: inherit;
    background: rgba(0, 0, 0, 0.85);
    z-index: 1;
}

.game-card span {
    position: relative;
    z-index: 2;
}

.ttt {
    background-image: url("https://images.unsplash.com/photo-1611996575749-79a3a250f948");
}

.snake {
    background-image: url("https://images.unsplash.com/photo-1605379399642-870262d3d051");
}

.rps {
    background-image: url("https://images.unsplash.com/photo-1525182008055-f88b95ff7980");
}

.memorygame {
    background-image: url("https://images.unsplash.com/photo-1511512578047-dfb367046420");
}

.game-card:hover {
    transform: translateY(-10px) scale(1.04);
}

.game-card .glow {
    position: absolute;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(99,102,241,0.6), transparent);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 1;
}

@keyframes slideup {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-card {
    opacity: 0;
    transform: translateY(40px);
}

.game-card.show {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s ease;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.5);
    transform: scale(0);
    animation: rippleAnim 0.6s linear;
    pointer-events: none;
}

@keyframes rippleAnim {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.locked {
    cursor: not-allowed;
    filter: grayscale(1);
}

.badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ef4444;
    padding: 4px 10px;
    font-size: 0.7rem;
    border-radius: 20px;
    z-index: 3;
}

.badge-new {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ef4444;
    padding: 4px 10px;
    font-size: 0.7rem;
    border-radius: 20px;
    z-index: 3;
}

.features {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 24px;
    padding: 50px 20px;
}

.feature {
    flex: 1 1 200px;
    max-width: 260px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 24px;
    border-radius: 16px;
    text-align: center;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-8px);
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.6);
}

@media (max-width: 768px) {
    .features {
        flex-wrap: wrap;
    }
}   

.about {
    padding: 60px 20px;
    text-align: center;
    color: white;
    background: rgba(0, 0, 0, 0.6);
}

.footer {
    text-align: center;
    padding: 20px;
    color: white;
    opacity: 0.6;
}

@media (max-width: 600px) {
    .hero h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 14px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h2 {
        font-size: 2.2rem;
    }
}

.games-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.game-cards.scrollable {
    display: flex;
    gap: 24px;
    flex-wrap: nowrap;
    position: relative;
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 20px 50px;
    justify-content: flex-start;
}

.game-cards.scrollable::-webkit-scrollbar {
    display: none;
}

.game-cards.scrollable::before,
.game-cards.scrollable::after {
    content: "";
    position: sticky;
    top: 0;
    width: 80px;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.game-cards.scrollable::before {
    left: 0;
    background: linear-gradient(to right, #000 0%, transparent 100%);
}

.game-cards.scrollable::after {
    right: 0;
    background: linear-gradient(to left, #000 0%, transparent 100%);
}

.scroll-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.6);
    border: 2px solid cyan;
    color: cyan;
    font-size: 32px;
    padding: 6px 12px;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.25s ease;
    z-index: 5;
}

.scroll-btn.left { left: 10px; }
.scroll-btn.right { right: 10px; }

.games-wrapper.hover .scroll-btn {
    opacity: 1;
}