/* Navigation */
.nav {
    height: 80px;
    position: fixed;
    top: 20px;
    left: 50%;
    right: auto;
    width: fit-content;
    transform: translateX(-50%);
    background: rgba(10, 10, 15, 0);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    z-index: 1000;
    border: 1px solid rgba(255, 255, 255, 0);
    border-radius: 20px;
    box-shadow: 
        0 0px 0px rgba(0, 0, 0, 0),
        0 0px 0px rgba(0, 0, 0, 0),
        inset 0 0px 0px rgba(255, 255, 255, 0);
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
}

.nav.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        0 2px 8px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav:hover {
    /* Remove the transform that causes jumping */
}

.nav.scrolled:hover {
    background: rgba(10, 10, 15, 0.95);
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.nav-content {
    width: 100%;
    margin: 0;
    padding: 0;
    height: 100%;
    display: flex;
    align-items: center;
    background: none;
}

.nav-inner {
    width: fit-content;
    max-width: none;
    margin: 0;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    gap: 2rem;
}

.nav.scrolled .nav-content {
    justify-content: center;
}

.nav.scrolled .nav-inner {
    width: fit-content;
    max-width: none;
    margin: 0;
    padding: 0 1.5rem;
    justify-content: space-between;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    margin-left: auto;
}

.mobile-menu-btn {
    display: none;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
}

.nav-links a {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    opacity: 0.8;
    transition: var(--transition);
    font-family: 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    letter-spacing: 0.01em;
}

.nav-links a:hover {
    opacity: 1;
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 2rem;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.card:hover {
    transform: translateY(-8px);
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Feature Cards */
.feature-card {
    text-align: center;
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Tutor Cards */
.tutor-card {
    text-align: center;
}

.tutor-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.1);
}

.tutor-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tutor-stats {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    color: rgba(255, 255, 255, 0.6);
    font-family: 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    letter-spacing: 0.01em;
}

/* Game Cards */
.game-card {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    aspect-ratio: 16/9;
    cursor: pointer;
}

.game-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.game-card:hover .game-image {
    transform: scale(1.05);
}

.game-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    transform: translateY(0);
    transition: var(--transition);
}

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

/* Quiz Card */
.quiz-card {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
}

/* Stats */
.stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: rgba(255, 255, 255, 0.6);
    font-family: 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    letter-spacing: 0.01em;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .stats {
        flex-direction: column;
    }

    .stat-card {
        width: 100%;
    }
}