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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow-x: hidden;
}

.container {
    min-height: 100vh;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 40px;
}

.app-title {
    display: flex;
    align-items: center;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.heart-icon {
    color: #ff6b9d;
    margin-right: 12px;
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 600px;
    width: 100%;
}

/* Navigation Items */
.nav-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-height: 140px;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.nav-item i {
    font-size: 32px;
    margin-bottom: 12px;
    color: white;
}

.nav-item span {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

/* Empty item styling */
.nav-item.empty {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: default;
}

.nav-item.empty:hover {
    background: transparent;
    transform: none;
    box-shadow: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        padding: 15px 0;
        margin-bottom: 30px;
    }
    
    .app-title {
        font-size: 24px;
    }
    
    .nav-grid {
        gap: 15px;
        max-width: 100%;
    }
    
    .nav-item {
        padding: 25px 15px;
        min-height: 120px;
    }
    
    .nav-item i {
        font-size: 28px;
    }
    
    .nav-item span {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .nav-grid {
        gap: 12px;
    }
    
    .nav-item {
        padding: 20px 10px;
        min-height: 100px;
    }
    
    .nav-item i {
        font-size: 24px;
    }
    
    .nav-item span {
        font-size: 12px;
    }
}